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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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 / [email protected]
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
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stator/rotor skewing pole/slot shaping current injection stator/rotor notching randomized PWM
OVERVIEW OF MANATEE FOR E-NVH
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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:
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Third-party sound quality tools
Third-party electromagnetic design tools
Third-party structural design tools
Third-party acoustic design tools
Third-party gearbox NVH design tools
Standalone e-motor NVH solution (electromagnetics
+vibro-acoustics)
© Masta
© Actran
© Oros
© Jmag
© Ansys
Third-party NVH data acquisition tools
© Oros
v1.08 coupling
v1.09 coupling
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
MANATEE v1.07. graphical environment:
Scripting environment (Matlab)
Simple command line post-processings
(Matlab)
GUI for machine & simulation set-up
(Python)
no Matlab toolbox needed
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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 / [email protected]
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, fromW 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
Naval
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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Magnet / current
excitations
ELECTROMAGNETIC MODULE
ELECTRICAL MODULE
STRUCTURAL MODULE
ACOUSTIC MODULE
MANATEE software seamlessly integrates the following multiphysic modules:
Dynamic vibrations
Variable speed NVH
Geometry and control parameters
3D force distribution
THERMAL MODULE
VARIABLE SPEED MODULEMULTI-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 if necessary, resulting in a flexible simulation workflow. Module interface is documented for possible integration in third-party scripts.
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
E-NVH ELECTRICAL MODEL OPTIONS
EQUIVALENT CIRCUIT
Option 1: Simulink® PWM block
Option 2: Analytical / numerical PWM
Phase voltage waveforms
PWM MODEL
User-defined voltage waveforms
Phase currentwaveforms
User-defined currentwaveforms
• PWM model with several strategies (synchronous, asynchronous, calculated, full wave) including randomized switching strategies
• No strong circuit (yet) in v1.07
Machine and converter input
parameters
User-definedequivalent circuit
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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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.
E-NVH ELECTROMAGNETIC MODEL OPTIONS
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
Option 1: 2,5D ANALYTICAL PERMEANCE / MMF MODEL User-defined airgap flux distribution
Phase current waveforms
Option 2: 2,5D SEMI-ANALYTICAL SUBDOMAIN MODEL
Option 3: 2,5D FINITE ELEMENT MODEL (FEMM)
Analytical mmf in linear case using winding function model
Analytical permeance incl. geometrical assymetries (e.g. uneven airgap, eccentricities)
FEA permeance incl. saturation, magnetic wedges, notches…
Airgap time and space flux
distribution
FEA mmf including non linearities
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
Permeance/ MMF Subdomain FEMM
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 permeance waves for IM)
No (except on IPMSM rotor**)
Yes
Static and dynamic eccentricities Yes No Yes
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**SPMSM
SCIMDFIM
WRSM**
IPMSM**SPMSM
SCIMDFIM
WRSM**
IPMSMSPMSM
SCIM (no-load)DFIM
WRSM
*can be modelled but not included yet in MANATEE v1.07**fast hybridation with FEMM
Subdomain model on SPMSM:
Permeance/mmf model on SCIM:
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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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:
Permeance/mmf
SCIM SPMSM, IPMSM, WRSM, SRM
Subdomain
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
• 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 / [email protected]
• High accuracy and fast subdomain model for synchronous machine:
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• Automatic coupling with FEMM finite element software (symmetries, boundary conditions) in order to model more complex problems (e.g. shaped magnets, saturation effects)
Finite elementmagnetostatics (FEMM)
5 min
MANATEE subdomain models0.1 s
spacetimetime
space
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
> 1 hr of calculation 1 s of calculation
• Comparison between Altair Flux® (FEA) and MANATEE ® (SDM) airgap flux distribution in time and space on a loaded SPMSM include non-linearity:
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
E-NVH MAGNETIC FORCE CALCULATION OPTIONS
Stator and rotor nodal or lumped Maxwell harmonic forces and moments
Airgap time and space flux distribution
MAGNETIC FORCE CALCULATION, PROJECTION AND 2D FFT
Option 3: Virtual Work Principle nodal magnetic forces
Torque ripple
r=0 r=2 r=3
• 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
Option 1: Lumped magnetic load vectors
Option 2**: Surface magnetic force densities
**force calculation not coupled to structural model in v1.08
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
S=Enveloppe fermée
Dynamic deflections
Option 1: 2,5D ANALYTICAL CYLINDER MODEL
Static radial deflections
Natural frequencies of the circumferentialmodes of an equivalent ring
User defined natural frequencies(e.g. experimental data)
Natural frequenciesautomatically calculated by
FEM on a 3D model
Force application on imported FEA model or concept stator built from scratch
Average dynamic radial deflections
3D vibration velocity field
Option 2: 3D FINITE ELEMENT STRUCTURAL MODEL Optistruct / Ansys / Nastran / Abaqus*
E-NVH STRUCTURAL MODEL OPTIONS
BASIC DESIGN
DETAILED DESIGN
Stator and rotor nodal or lumped Maxwell harmonic
forces and moments
*available in MANATEE v1.09
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
Tangential and radial harmonic magnetic forces (magnitude, wavenumber, frequency, phase)
3D airgap flux distribution
HARMONIC FORCE PROJECTION
r=2 r=3
ELECTROMAGNETIC MODEL
r=0
STRUCTURAL MODEL
Unit rotating loads identified with MANATEE
r=0, ±2, ±3 …
STRUCTURAL FREQUENCY RESPONSE FUNCTIONS
r=0 r=2
ELECTROMAGNETIC VIBRATION SYNTHESIS
Complex FRFs (radial & tangential) for each force
wavenumber r
Electromagnetic Vibration Synthesis (EVS): faster than a direct coupling, more physical insights
• 2D or 3D external FEA software (e.g. Flux, Jmag, Maxwell, Magnet)
• MANATEE 2,5D electromagnetic models (SDM, PMMF, FEMM)
• 3D external FEA software (e.g. Optistruct, Ansys, Actran)
• MANATEE 2,5D structural models
Vibration and noise spectrum with modal participation
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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
Spectrogram Synthesis Algorithm (SSA): fast calculation of variable-speed NVH behaviour
Single speed calculation
Extrapolation at higher speeds
Extrapolation at lower speeds
• 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
Vibration and noise waterfallsOperational Deflection ShapesModal contribution
ELECTROMAGNETIC VIBRATION SYNTHESIS
SPECTROGRAM SYNTHESIS
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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 / [email protected]
CLAMPED – FREE
Boundary conditions
FREE – FREE
Boundary conditions
Automated identification of cylindrical modes based on enveloppe nodes
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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Dynamic radial deflections
Option 1: SEMI-ANALYTICAL ACOUSTIC MODEL
Radiation efficiency of an equivalent cylinder
E-NVH ACOUSTIC MODEL OPTIONS
Sound power levelSound pressure level
2D (analytical) or 3D (FEM) spatial-averagedvibration velocity
Sound synthesis .wav
Option 2: NUMERICAL FEA ACOUSTIC MODEL
Coupling with
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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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© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
VALIDATIONS AND DOCUMENTATION
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• 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
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
MANATEE SOFTWARE VALIDATIONS
Case of a traction concentrated winding PMSM with interior magnets at partial load (blind test):
Sound level during a run-up (experiments with gearbox+water-cooling+converter harmonics)
Sound level during a run-up (MANATEE simulation without
converter harmonics)~10 sec on a laptop
TESTS MANATEE
Motor A
Motor B-40 dB
Fast electromagnetic model neglecting saturation can be used in basic design phase to avoidstrong resonances, no need of detailed multiphysic numerical models
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
Case of a squirrel cage induction motor of a naval dredge pump at no-load:
Sound level during a run-up (experiments with PWM + gearbox +air-cooling)
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)
TESTS
MANATEE
gearbox lines
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
Case of a railway squirrel cage traction induction machine with Sound Power Level measurements accordingISO3745 in semi-anechoic chamber:
Sound power level during run-up (including fan noise)
Sound power level during a run-up (without air cooling)~2 sec on a laptop
TESTS
MANATEE
Fast vibroacoustic model neglecting 3D effects can be used in basic design phase to avoidstrong resonances, no need of detailed multiphysic numerical models
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
Case of a salient pole synchronous hydroelectric generator with damper bars
Fast vibroacoustic model neglecting 3D effects can be used in basic design phase to avoidstrong resonances, no need of detailed multiphysic numerical models
Sound level during a run-up Sound level during a run-up
~10 sec on a laptop
TESTS MANATEE
2 resonances
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
Case of a traction distributed winding PMSM with interior magnets at partial load:
Fast vibroacoustic model neglecting 3D effects can be used in basic design phase to avoidstrong resonances, no need of detailed multiphysic numerical models
Sound level during a run-up (experiments in non ideal acoustic
conditions)Sound level during a run-up
(MANATEE, coupling with non linear FEMM)~6 hours on a standard PC
Sound level during a run-up (MANATEE simulation, linear subdomain)
~10 sec on a standard PC
overall
SPL avg 3 micros
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
Geometry / Currents (manual - automated import
upon request)
MANATEE INTEGRATION TO E-MACHINE DESIGN WORKFLOW
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Step 1 : basic electromagnetic + basic vibro-acoustic design loops
Option A. Standalone electromagnetic & vibroacoustic design optimization
Option B. Coupling with third partly fast electromagnetic design tools (optional)
Speed, FluxMotor, RPMXpert etc.
• 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)
Matlab/Python scripts
Note: these workflows are given as examples, other use may be possible
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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Step 2 : detailed electromagnetic + basic vibro-acoustic design loops:
Coupling with third party FEA electromagnetic design tools
Airgap flux lookup tables
NVH maps in torque / speed plane
Skew / torque ripple / axial ripple optimization
• 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 / [email protected]
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FRF
Export to third partly sound quality software (optional)
Coupling with third party FEA structural software
Sound .wav
Step 3 : detailed electromagnetic + detailed vibro-acoustic design loops:
• 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
Coupling with third partly FEA electromagnetic software
forcesvibrations
Airgap flux lookup tables
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
BUILT-IN PLOT COMMANDS
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• MANATEE includes more than 120 plot commands directly accessible in command line• Example of Matlab
quick plot command without arguments
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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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
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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Magnetic harmonic forces analysis with automated identification of lines expression
(PMSM) (SCIM)
Wavenumber
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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Magnetic harmonic forces analysis
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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Automated analysis of magnetic force waves in open circuit / partial load
>> 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}
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:
stator slottingpermeance waves
rotor magnetflux density waves
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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 / [email protected]
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 / [email protected]
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 / [email protected]
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 / [email protected]
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 / [email protected]
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 / [email protected]
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Modal contribution to acoustic and vibration spectra up to 20000 Hz
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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 / [email protected]
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 / [email protected]
« 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 / [email protected]
Order analysis per circumferential vibration wavenumber (including rotation direction)
r=0 r=1
r=+2r=-2
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
Acoustic noise maps in torque/speed plane
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)
Example of a 48s8p IPMSM with stepped-skew rotor
NVH behaviour is different in traction and braking
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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 / [email protected]
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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 / [email protected]
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 / [email protected]
Listen to your electrical machine (direct sound synthesis)
• Sound synthesis can be carried at single speed or variable speed
Sound with 4800 Hz PWM Sound with 10000 Hz PWMSound under sine supply
Run-up at variable speed
• 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 / [email protected]
is_mmfs
is_ideal_mmfs
is_mmfr
is_ideal_mmfr
is_slotS
is_slotR
LwrA
LwrA_max
ism
mfs
de
alm
mfs
ism
mfr
de
alm
mfr
isslo
tS
isslo
tR
LwrA
LwrA
max
corr factor
0
0.2
0.4
0.6
0.8
1
Automated harmonic source analysis on electromagnetically-excited noise
High correlation between maximum noise level and rotor slotting harmonics
High correlation between maximum noise level and rotor mmf
Low correlation between maximum noise level and stator winding armature spatial harmonics
High correlation between maximum noise level and nominal noise level
© 2013-2019 EOMYS ENGINEERING / 121 rue de Chanzy CS10128 59030 Lille Cedex FRANCE / www.eomys.com / [email protected]
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 / [email protected]
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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