MANATEE SIMULATION SOFTWARE - Magnetic Acoustic Noise Analysis Tool for Electrical Engineering - Eomys
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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
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 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
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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
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 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
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 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
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
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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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
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)
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.comPermeance/ 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.comModel 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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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com• 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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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com• 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.comE-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.comE-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.comElectromagnetic 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.comSpectrogram 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.comCoupling 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.comAutomated 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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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.comKEY 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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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.comVALIDATIONS 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.comMANATEE 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.comCase 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.comCase 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.comCase 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.comCase 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.comMANATEE 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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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.comStep 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
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• 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.comStep 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
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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.comBUILT-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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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.comGeometry, 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.comMagnetic harmonic forces analysis with automated identification of lines expression
(PMSM) (SCIM)
Wavenumber
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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.comMagnetic harmonic forces analysis
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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.comAutomated 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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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.comStatic (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.comSpectrogram 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.comSpace 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
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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.comContribution 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.comOrder 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.comAcoustic 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.comAutomated 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.comUnbalanced 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.comAutomated 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.com5D « 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
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