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 2 © 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 3 © 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. 7 © 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. 9 © 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.com
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 12 © 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) 14 © 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.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 22 © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
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 23 © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
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 24 © 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) 30 © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
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 33 © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
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 34 © 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 35 © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
Magnetic harmonic forces analysis 36 © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
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 37 © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
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 57 © 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / contact@eomys.com
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