MANATEE SIMULATION SOFTWARE - Magnetic Acoustic Noise Analysis Tool for Electrical Engineering - Eomys

 
MANATEE SIMULATION SOFTWARE - Magnetic Acoustic Noise Analysis Tool for Electrical Engineering - Eomys
MANATEE® SIMULATION SOFTWARE
                                   Magnetic Acoustic Noise Analysis Tool for Electrical Engineering

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
MANATEE SIMULATION SOFTWARE - Magnetic Acoustic Noise Analysis Tool for Electrical Engineering - Eomys
OVERVIEW OF MANATEE FOR E-NVH

   MANATEE simulation software can be used for the electromagnetic design optimization of electrical machines
   including the analysis of magnetic vibrations and acoustic noise due to Maxwell forces (“e-NVH”).
   MANATEE unique features include:
   •      - fast electromagnetic Noise Vibration Harshness (e-NVH) calculation in early electromagnetic design loops
          - optimized e-NVH calculation in detailed design phase (coupling with structural FEA) over full operating range
          - advanced post-processing for e-NVH root cause analysis
          - design optimization environments of e-motor noise mitigation technique

         stator/rotor skewing                 pole/slot shaping              current injection           stator/rotor notching   randomized PWM

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       © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
MANATEE SIMULATION SOFTWARE - Magnetic Acoustic Noise Analysis Tool for Electrical Engineering - Eomys
MANATEE is the central point for the integrated Noise, Vibration, Harshness design process of electric
powertrains (e-NVH), from basic vibro-acoustic design at e-motor level to detailed vibro-acoustic design at
system level:

   Third-party electromagnetic                                                                                             Third-party sound
           design tools                                                                                                       quality tools

                                                          Standalone e-motor NVH

                                                                                                                                            © Oros
         © Jmag

                                                         solution (electromagnetics
                                                              +vibro-acoustics)

         Third-party structural                                                                                        Third-party NVH data
              design tools                                                                                                acquisition tools

                                      Third-party gearbox NVH                  Third-party acoustic
                                             design tools                          design tools
                   © Ansys

                                                                                                                                        © Oros
                                                                                                            © Actran
                  v1.08 coupling
                                         © Masta

                  v1.09 coupling
                                                                                                                                                     3
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
MANATEE SIMULATION SOFTWARE - Magnetic Acoustic Noise Analysis Tool for Electrical Engineering - Eomys
MANATEE v1.07. graphical environment:

   GUI for machine &
   simulation set-up
       (Python)

Scripting environment
       (Matlab)

        Simple command line
          post-processings
                                                              no Matlab toolbox needed
              (Matlab)
     © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
MANATEE SIMULATION SOFTWARE - Magnetic Acoustic Noise Analysis Tool for Electrical Engineering - Eomys
MANATEE is currently under Matlab® (R2009b or later), but its GUI is in Python/Qt to set-up the
machine and simulation parameters. MANATEE does not use any Matlab toolbox.

MANATEE built-in fast electromagnetic models are based on geometrical layouts (cf. website).
New lamination shapes can be easily implemented by EOMYS upon request.

The following radial flux electrical machine topologies are included in MANATEE v1.08:
•     SCIM, DFIM
•     Inner or outer rotor SPMSM, ISPMSM, IPMSM
•     WRSM, SynRM, SRM

    © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
MANATEE SIMULATION SOFTWARE - Magnetic Acoustic Noise Analysis Tool for Electrical Engineering - Eomys
A few figures about MANATEE:

•    Up 40 dB acoustic noise reduction after redesign based on EOMYS consulting activities
•    Successfully applied on more than 80 industrial cases with IPMSM, SCIM, WRSM, DFIG, inner & outer rotor, from
     W to MW range, from 5 rpm to 150 000 rpm, from 10mm to 10m diameter machines
•    More than 100 multiphysic validation simulation projects open to MANATEE users
•    More than 120 graphical post-processing commands (such as plot_machine) to ease e-NVH root cause analysis

    © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
                                                                                                                             Naval
MANATEE SIMULATION SOFTWARE - Magnetic Acoustic Noise Analysis Tool for Electrical Engineering - Eomys
MANATEE software seamlessly integrates the following multiphysic modules:

                                                                               3D force                             Dynamic
 Geometry                               Magnet /                                                                                                 Variable
                                                                              distribution                          vibrations
and control                              current                                                                                                speed NVH
parameters                             excitations

                    ELECTRICAL                       ELECTROMAGNETIC                           STRUCTURAL                        ACOUSTIC
                     MODULE                              MODULE                                  MODULE                           MODULE

                                                       VARIABLE SPEED MODULE
                                                      MULTI-SIMULATION MODULE
                                                        OPTIMIZATION MODULE

   The interface between physics (e.g. mesh to mesh projections) are automatically defined.
   All module inputs can be user-defined / imported
                                    THERMAL  MODULE if necessary, resulting in a flexible simulation workflow.
   Module interface is documented for possible integration in third-party scripts.

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       © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
MANATEE SIMULATION SOFTWARE - Magnetic Acoustic Noise Analysis Tool for Electrical Engineering - Eomys
E-NVH ELECTRICAL MODEL OPTIONS
                                                                User-defined voltage             User-defined                 User-defined current
                                                                     waveforms                 equivalent circuit                 waveforms

 Machine and                                                      Phase voltage                                                 Phase current
converter input                                                    waveforms                                                     waveforms
  parameters

                     Option 1: Simulink® PWM block
                     Option 2: Analytical / numerical PWM
                                                                                        EQUIVALENT CIRCUIT
                               PWM MODEL

    •    PWM model with several strategies (synchronous, asynchronous, calculated, full wave) including
         randomized switching strategies
    •    No strong circuit (yet) in v1.07

     © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
MANATEE SIMULATION SOFTWARE - Magnetic Acoustic Noise Analysis Tool for Electrical Engineering - Eomys
E-NVH ELECTROMAGNETIC MODEL OPTIONS

     MANATEE electromagnetic model relies on the fast calculation of the airgap radial and
     tangential flux density with the combination of the following modelling methods :
     •    Permeance / magnetomotive force analytical models (PMMF)
     •    Subdomain semi-analytical models (SDM)
     •    Finite element non-linear magnetostatic model (FEMM)

     Import of airgap flux from third-party electromagnetic software is supported.

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MANATEE SIMULATION SOFTWARE - Magnetic Acoustic Noise Analysis Tool for Electrical Engineering - Eomys
Analytical permeance incl.          FEA permeance incl. saturation,    FEA mmf including non linearities
            geometrical assymetries (e.g.         magnetic wedges, notches…                                              Analytical mmf in linear case using
            uneven airgap, eccentricities)                                                                                    winding function model

                                    Option 1: 2,5D ANALYTICAL PERMEANCE / MMF MODEL                                         User-defined airgap
                                                                                                                             flux distribution

                                    Option 2: 2,5D SEMI-ANALYTICAL SUBDOMAIN MODEL                                          Airgap time and
                                                                                                                               space flux
       Phase current                                                                                                          distribution
        waveforms

                                   Option 3: 2,5D FINITE ELEMENT MODEL (FEMM)

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Permeance/ MMF            Subdomain                FEMM                      Permeance/mmf model on SCIM:
Calculation time                                Very fast              Fast                  Slow
Tangential field calculation                       No                   Yes                   Yes
Torque ripple calculation                          No*                  Yes                   Yes
PWM currents                                       Yes                  Yes                   Yes
Robustness to geometry                           Limited              Limited               Good
Skewing (multi-slice w/o coupling)                 Yes                  Yes                   Yes
Saturation                                 Limited (saturated      No (except on              Yes
                                        permeance waves for IM)   IPMSM rotor**)
Static and dynamic eccentricities                  Yes                  No                    Yes
                                                                                                                        Subdomain model on SPMSM:
Uneven airgap                                      Yes                  No                    No

Pole displacement, demagnetization                 Yes                  Yes                   Yes
Stator short-circuit                               Yes                  No*                  No*
IM broken bar                                      Yes                  Yes                  No*
Topologies                                      IPMSM**              IPMSM**               IPMSM
                                                 SPMSM                SPMSM                SPMSM
                                                  SCIM                 SCIM             SCIM (no-load)
                                                  DFIM                 DFIM                 DFIM
                                                WRSM**               WRSM**                WRSM

*can be modelled but not included yet in MANATEE v1.07
**fast hybridation with FEMM

    © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Model hybridation is possible in MANATEE such as
  •    Calculation of mmf using non-linear FEMM (e.g. rotor mmf for interior magnet machines)
  •    Calculation of permeance using non-linear FEMM (e.g. saturation effects, notch effects,
       magnetic wedges)

  Recommended fast electromagnetic models in symmetrical healthy case:

                          SCIM                                                    SPMSM, IPMSM, WRSM, SRM

                 Permeance/mmf                                                           Subdomain

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•    Any winding type can be modelled (integral, fractional, user-defined, multiphase)
  •    A winding pattern defined in Domolites (formerly Koil) freeware can also be imported

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
•   High accuracy and fast subdomain model for synchronous machine:

   Finite element
                                                                                                                             MANATEE subdomain models
magnetostatics (FEMM)
                                                                                                                                       0.1 s
        5 min

                                time                                            time
                                                             space                                         space

     •   Automatic coupling with FEMM finite element software (symmetries, boundary conditions) in order
         to model more complex problems (e.g. shaped magnets, saturation effects)

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•    Comparison between Altair Flux® (FEA) and MANATEE ® (SDM) airgap flux distribution in time and
     space on a loaded SPMSM include non-linearity:

                                    > 1 hr of calculation                     1 s of calculation

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
E-NVH MAGNETIC FORCE CALCULATION OPTIONS

                                     MAGNETIC FORCE CALCULATION,
                                        PROJECTION AND 2D FFT                                        r=0                 r=2       r=3

                                   Option 1: Lumped magnetic load vectors
      Airgap time and space                                                                    Stator and rotor nodal or lumped
         flux distribution                                                                   Maxwell harmonic forces and moments

                                                                                                            Torque ripple
                                   Option 2**: Surface magnetic force
                                   densities

                                   Option 3: Virtual Work Principle nodal
                                   magnetic forces

                              **force calculation not coupled to structural model in v1.08

  •    Torque ripple and cogging torque are naturally obtained as a particular case of magnetic forces
  •    Trade-offs between torque ripple and noise minimization can therefore be obtained with MANATEE

      © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
E-NVH STRUCTURAL MODEL OPTIONS
                             User defined natural frequencies       Natural frequencies
                                 (e.g. experimental data)        automatically calculated by
                                                                     FEM on a 3D model

                                                     Option 1: 2,5D ANALYTICAL CYLINDER MODEL
                                            Natural frequencies of the circumferential
                                            modes of an equivalent ring
                                                                                                                                    BASIC DESIGN
                                                                                               Average dynamic radial deflections

 Stator and rotor nodal or                   Static radial deflections
lumped Maxwell harmonic                                                                                                                Dynamic
   forces and moments                                                                                                                 deflections

                                                 Option 2: 3D FINITE ELEMENT STRUCTURAL MODEL
                                                             Optistruct / Ansys / Nastran / Abaqus*
                                              S=Enveloppe fermée

                                                                                                 3D vibration velocity field
                                                                                                                                    DETAILED DESIGN

                                                 Force application on imported FEA model or
                                                      concept stator built from scratch

                                                                         *available in MANATEE v1.09
     © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Electromagnetic Vibration Synthesis (EVS): faster than a direct coupling, more physical insights
  OPERATIONAL LOADS

                                            ELECTROMAGNETIC                        HARMONIC FORCE
   CALCULATION OF

                                                 MODEL      3D airgap flux           PROJECTION
                                                             distribution
                                                                                 r=0        r=2         r=3

                                    •   2D or 3D external FEA software
                                        (e.g. Flux, Jmag, Maxwell, Magnet)      Tangential and radial harmonic
                                    •   MANATEE 2,5D electromagnetic models      magnetic forces (magnitude,
                                        (SDM, PMMF, FEMM)
                                                                                wavenumber, frequency, phase)
                                                                                                                   ELECTROMAGNETIC
                                                                                                                  VIBRATION SYNTHESIS
                                                Unit rotating loads
                                             identified with MANATEE
                                                   r=0, ±2, ±3 …                                                                            Vibration and noise spectrum with
                                                                                Complex FRFs (radial &
                                                                               tangential) for each force                                          modal participation
CHARACTERIZATION

                                                                                    wavenumber r
  STRUCTURAL

                                            STRUCTURAL MODEL                     STRUCTURAL FREQUENCY
                                                                                  RESPONSE FUNCTIONS

                                                                                        r=0             r=2

                                        • 3D external FEA software
                                          (e.g. Optistruct, Ansys, Actran)
                                        • MANATEE 2,5D structural models

                   © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Spectrogram Synthesis Algorithm (SSA): fast calculation of variable-speed NVH behaviour

  •      Calculation of electromagnetic excitations at only 1 to 6 single speeds depending on load state
  •      Extrapolation of operational magnetic loads to variable speed based on the knowledge of the evolution of
         magnetic forces with operating point and Id/Iq strategy (saturation of reference operating point is assumed to
         be constant over speed)
  •      Speeds-up NVH calculation and reduces parasitic forces as there is no need to interpolate magnetic force
         harmonics magnitude between speed
                                                                     Single speed calculation

                         Extrapolation at higher speeds

                       Extrapolation at lower speeds

                                                                                                Vibration and noise waterfalls
                       ELECTROMAGNETIC                         SPECTROGRAM
                                                                                                Operational Deflection Shapes
                      VIBRATION SYNTHESIS                        SYNTHESIS                      Modal contribution

      © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Coupling with third party structural FEA :

    •    Possibility to automatically call from MANATEE an existing FEA model of Optistruct /
         Ansys / Nastran, or to rebuild a lamination model (« concept stator ») from scratch:
          • circular lamination with any slot geometry (possibility to simplify the slot geometry to
              have a lighter structural model)
          • application of physics: orthotropic properties, winding mass
          • application of boundary conditions (e.g. clamped/clamped, free/clamped, fixed nodes)
          • meshing based on the number of nodes in the different regions
    •    Automated magnetic force application (load collectors)

    •    Vibration synthesis post-processing using operational magnetic loads from MANATEE
         electromagnetic model or third party electromagnetic software

   © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Automated identification of cylindrical modes based on enveloppe nodes

 CLAMPED – FREE
Boundary conditions

   FREE – FREE
Boundary conditions

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
E-NVH ACOUSTIC MODEL OPTIONS

                                            Option 1: SEMI-ANALYTICAL ACOUSTIC MODEL
            Dynamic radial         Radiation efficiency of an equivalent cylinder                                            Sound power level
             deflections                                                                                                    Sound pressure level

                                                                                                                            Sound synthesis .wav
                                   2D (analytical) or 3D (FEM) spatial-averaged
                                   vibration velocity

                                             Option 2: NUMERICAL FEA ACOUSTIC MODEL
                                                             Coupling with

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KEY FEATURES OF MANATEE SOFTWARE

     •    Fast variable speed vibroacoustic calculation (from 1 sec to 1 mn) based on efficient
          calculation methods even with 3D effects and converter harmonics
     •    Possibility of decoupling electromagnetics & structural mechanics (EVS algorithm) to speed
          up NVH Vs electromagnetic performances optimization studies
     •    High frequency acoustic calculations (up to 20 kHz) within seconds, contrary to numerical
          approaches
     •    Large number of NVH root cause analysis post processing tools
     •    Easy implementation of all e-machine noise and vibration control actions (e.g. current
          injection, skewing, pole shaping, notching)
     •    Extensive online documentation with tutorials and validation cases

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VALIDATIONS AND DOCUMENTATION

  •     A full website is dedicated to MANATEE validations, post-processings, and tutorials:
                                                              www.manatee-software.com
  •     All modules are validated using special validation projects which can be run and modified by the
        user:
          >>run_MANATEE(‘EM_SPMSM_NL_001');
  •     Validation cases are daily tested on the current version of MANATEE
  •     The input and output simulation data are stored in structures and substructures which are
        documented in an Excel file
  •     Three main tutorials for the electromagnetic and vibroacoustic simulation of squirrel cage
        induction machines, interior and surface PMSM

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      © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
MANATEE SOFTWARE VALIDATIONS
  Case of a traction concentrated winding PMSM with interior magnets at partial load (blind test):

                                   TESTS                                                                        MANATEE

                                                                                                                                Motor B
                                                                                                    -40 dB

                                                                                                  Motor A

                                                                                                       Sound level during a run-up
                    Sound level during a run-up                                                       (MANATEE simulation without
                 (experiments with gearbox+water-                                                        converter harmonics)
                   cooling+converter harmonics)                                                           ~10 sec on a laptop

              Fast electromagnetic model neglecting saturation can be used in basic design phase to avoid
              strong resonances, no need of detailed multiphysic numerical models

   © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Case of a squirrel cage induction motor of a naval dredge pump at no-load:
                                           gearbox lines

         TESTS
Sound level during a run-up
(experiments with PWM +
gearbox +air-cooling)

      MANATEE
Sound level during a run-up
(simulation without PWM)
~2 sec on a laptop

            15 dB reduction reached after redesign with MANATEE (change of rotor slot number)
  © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Case of a railway squirrel cage traction induction machine with Sound Power Level measurements according
    ISO3745 in semi-anechoic chamber:

            TESTS
Sound power level during run-
up (including fan noise)

        MANATEE
Sound power level during a run-up
(without air cooling)
~2 sec on a laptop

                Fast vibroacoustic model neglecting 3D effects can be used in basic design phase to avoid
                strong resonances, no need of detailed multiphysic numerical models

     © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Case of a salient pole synchronous hydroelectric generator with damper bars

                            TESTS                                                                     MANATEE

   2 resonances

                                                                                                   Sound level during a run-up
           Sound level during a run-up                                                                ~10 sec on a laptop

           Fast vibroacoustic model neglecting 3D effects can be used in basic design phase to avoid
           strong resonances, no need of detailed multiphysic numerical models

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Case of a traction distributed winding PMSM with interior magnets at partial load:

                            SPL avg 3
                            micros
            overall

                                                                                                                   Sound level during a run-up
                                                                                                              (MANATEE simulation, linear subdomain)
     Sound level during a run-up                                                                                    ~10 sec on a standard PC
 (experiments in non ideal acoustic       Sound level during a run-up
            conditions)             (MANATEE, coupling with non linear FEMM)
                                          ~6 hours on a standard PC

            Fast vibroacoustic model neglecting 3D effects can be used in basic design phase to avoid
            strong resonances, no need of detailed multiphysic numerical models

 © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
MANATEE INTEGRATION TO E-MACHINE DESIGN WORKFLOW
  Note: these workflows are given as examples, other use may be possible

  Step 1 : basic electromagnetic + basic vibro-acoustic design loops

  Option A. Standalone electromagnetic &                    Option B. Coupling with third partly fast
  vibroacoustic design optimization                         electromagnetic design tools (optional)
                                                                                        Geometry / Currents
                                                                                     (manual - automated import   Speed, FluxMotor, RPMXpert etc.
                                                                                           upon request)
                                                                                                                  Matlab/Python scripts

    • Fast assessment of electrical machines air-borne noise to rank different topologies (ex: SyRM Vs
      IPMSM, slot/pole combinations) at variable speed along torque/speed curve under sine supply

    • Possibility to drive MANATEE models from Python/Matlab scripts

    • First electromagnetic design NVH optimization by implementing electrical noise mitigation
      techniques (skewing, notching)
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Step 2 : detailed electromagnetic + basic vibro-acoustic design loops:

   Coupling with third party FEA
   electromagnetic design tools

                                               Airgap flux                                                NVH maps in torque / speed plane
                                             lookup tables                                                Skew / torque ripple / axial ripple optimization
                               31

• Refinement of electromagnetic force calculation compared to MANATEE built-in electromagnetic
  models (e.g. 3D FEA magnetic model with axial effects, strong circuit coupling)

• Fast study of best trade-offs between NVH, torque ripple, losses etc on the whole operating
  range using MANATEE flux interpolation, skew pattern optimization, noise maps, sensitivity study
  features

 © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Step 3 : detailed electromagnetic + detailed vibro-acoustic design loops:
 Coupling with third party FEA                                                                         Coupling with third partly FEA
     structural software                                                                                 electromagnetic software
                                              FRF                                      Airgap flux
                                            forces                                   lookup tables
                                          vibrations
                                                                       Sound .wav
                                                                                                                            32
                                                  Export to third partly sound
                                                  quality software (optional)

 • Refinement of structural and acoustic calculations using complex structural CAD model including both
   airborne and structure borne vibrations based on Electromagnetic Vibration Synthesis

 • Quantification of e-motor / gearbox interactions by exporting MANATEE magnetic forces

 • Implementation of further NVH minimization focusing on structural solutions (e.g. housing, footings)

 • Potential extension to other sources of noise (e.g. gear whine, aerodynamic noise) and sound quality studies
 © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
BUILT-IN PLOT COMMANDS

  • MANATEE includes more than 120 plot commands directly accessible in command line
  • Example of Matlab

                                                                  quick plot command
                                                                  without arguments
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Geometry, time and space visualization, real and complex spectra for all quantities (permeance, mmf,
radial and tangential flux density, force, acceleration, velocity, displacements), 2d/3d animation

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 © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Magnetic harmonic forces analysis with automated identification of lines expression

                         (PMSM)                                                                                (SCIM)

                                                                                                                  Wavenumber

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Magnetic harmonic forces analysis

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Automated analysis of magnetic force waves in open circuit / partial load

     Example of a 12s10p PMSM (Zs=12, p=5) in open circuit conditions: to know how the origin of the force
     wavenumber r=2 occurring at f=10fs one can simply type:
       >> find_harmonic_PMSM_open_circuit_fr(10, 2, 5, 12)
       Force wave {f=10fs, r=2} is created by the product of flux waves B1=P1.F1 and
       B2=P2.F2 such as:
       B1={0,0}.{9fs,9p} and B2={0,-4Zs}.{fs,p}
       B1={0,0}.{fs,p}      and B2={0,-4Zs}.{11fs,11p}
       B1={0,0}.{7fs,7p}    and B2={0,-4Zs}.{3fs,3p}
       B1={0,0}.{5fs,5p} and B2={0,-4Zs}.{5fs,5p}
       B1={0,0}.{3fs,3p} and B2={0,-4Zs}.{13fs,13p}
       B1={0,0}.{5fs,5p} and B2={0,-4Zs}.{15fs,15p}

                 stator slotting       rotor magnet
                 permeance waves       flux density waves
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Static (top) and dynamic (bottom) radial vibration spectra

                                                                                         Possibility to plot frequencies as electrical
                                                                                         or mechanical orders
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Spectrogram of radial / tangential force harmonics for each spatial wavenumber

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Spectrogram of radial / tangential force harmonics of a given order, including rotation direction

 Operational deflection shapes at a given frequency

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Plot of tangential and radial forces per tooth in time and frequency domain

               r=0                                                    r=2                                                r=3

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Space vector diagram to analyze the origin of a radial or tangential force harmonic in terms of flux
  density waves

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Space vector diagram to analyze the origin of a radial or tangential flux density in terms of
  permeance and magnetomotive force waves

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Modal contribution to acoustic and vibration spectra up to 20000 Hz

                                                                                                                         44
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Contribution of each structural mode to the acoustic noise at variable speed

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Spectrogram and order analysis with automatic identification of main magnetic force
  harmonics orders and frequencies

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
« Spatiogram » noise analysis: decomposition of acoustic noise spectrogram per force wavenumber

                                                                                                            r=0

                                                                          =

                                  r=2                                                                        r=4

 +                                                                        +                                              +…

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Order analysis per circumferential vibration wavenumber (including rotation direction)
                                    r=0                                             r=1

                                  r=-2                                                 r=+2

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Acoustic noise maps in torque/speed plane

     Example of a 48s8p IPMSM with stepped-skew rotor

                                                                                            First resonance depends on torque/current level
                                                                                            -> due to armature/pole/slot interactions

                                                                                              Second resonance independent of torque/current level
                                                                                              -> due to pole/slot interactions (open circuit noise)

                                                                       NVH behaviour is different in traction and braking

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Automated skew optimization environment

    •    Automated study of torque maximization / torque ripple minimization / noise minimization tradeoffs
    •    Fast calculation based on flux lookup table as a function of Id/Iq
    •    Possibility to use this tool based on FEMM or third party FEA electromagnetic software

  © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Automated harmonic analysis

    •    Automated study of e-motor NVH harmonic sources
    •    Rotor/stator winding space harmonics, rotor/stator slotting, PWM, saturation, eccentricities

  © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Unbalanced magnetic pull calculation (example of the slotting effect on eccentric UMP
including skew of the stator)

  © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Listen to your electrical machine (direct sound synthesis)

 •       Sound synthesis can be carried at single speed or variable speed

                                                                                                                   Run-up at variable speed

                                                                  Sound under sine supply           Sound with 4800 Hz PWM           Sound with 10000 Hz PWM

     •    Sound can be exported to third party sound quality software (e.g. Artemis from HeadAcoustics) for
          further analysis

     © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Automated harmonic source analysis on electromagnetically-excited noise
                                                                                                 corr factor   High correlation between maximum noise level
                                                                                                         1     and nominal noise level

   LwrA_max

                                                                                                        0.8    High correlation between maximum noise level
        LwrA
                                                                                                               and rotor slotting harmonics
     is_slotR
                                                                                                        0.6     High correlation between maximum noise level and
      is_slotS
                                                                                                                rotor mmf
is_ideal_mmfr
                                                                                                        0.4
     is_mmfr                                                                                                    Low correlation between maximum noise level and
                                                                                                                stator winding armature spatial harmonics
is_ideal_mmfs
                                                                                                        0.2

     is_mmfs

                                                                                                        0
                                                                      isslotR
                                        ismmfr

                                                 dealmmfr

                                                                                       LwrAmax
                                                            isslotS
                   ismmfs

                            deal mmfs

                                                                                LwrA

       © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
5D « Muti-simulation Viewer » for post processing sensitivity & optimization results

© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
CONCLUSIONS
   •   MANATEE is the only software fully dedicated to the assessment of magnetic forces, magnetic vibrations
       and acoustic noise with validated force projection algorithms and validated noise results
   •   MANATEE is the only simulation environment giving physical insights on e-NVH, combining noise
       troubleshooting and noise mitigation tools
   •   MANATEE can be integrated both in pre-sizing and detailed design workflows and provides accelerated
       simulation times compared to a direct coupling approach
   •   MANATEE semi-analytic models and numerical algorithms give no parasitic numerical noise
   •   MANATEE is highly flexible based on Matlab/Python scripting
   •   MANATEE can be used as a standalone electromagnetic design software of electrical machines

                     See licensing options and subscribe to our newsletter at www.eomys.com

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   © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
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