RCA.HARM Analytic harmonic analysis for e-NVH troubleshooting

MANATEE software e-NVH Root Cause Analysis solutions
Sub-module RCA.HARM
Function Analytic harmonic analysis for e-NVH troubleshooting
Validation
See also RCA.PLOT Graphical post-processing for e-NVH root cause analysis
RCA.FILT Harmonic filters for e-NVH diagnosis

Objectives

This module of MANATEE software specialized in electric motor NVH virtual prototyping allows to efficiently analyze the root cause of noise and vibrations based on harmonic analysis.

Summary

The module identifies all main magnetic force harmonics (frequencies and wavenumbers) based on slot/pole/phase combinations, electrical machine topology (PMSM, WRSM, SCIM, SRM), switching frequency and load state using theoretical analytic work (instantaneous calculations).

Example of MANATEE offline analysis of e-NVH excitations in a 48s8p IPMSM
Example of MANATEE offline analysis of e-NVH excitations in a 48s8p IPMSM

It also provides the physical origin of a given force harmonic in terms of permeance, magnetomotive force, flux waves combinations as well as in terms of excitation sources (rotor/stator mmf, PWM time harmonics, eccentricities, saturation, winding or magnetization space harmonics). It is applicable to pulsating tangential stress wave to identify which flux harmonics are responsible for average torque generation or torque ripple. The modules allows to draw in a fraction of second a Campbell diagram of magnetic excitations per physical origin with magnitude estimates.

MANATEE Campbell diagram of main force harmonics in a 48s8p IPMSM
MANATEE Campbell diagram of main force harmonics in a 48s8p IPMSM

Graphical post-processing

The complete list of plot commands is available on MANATEE plot commands webpage. The following visualizations are more particularly related to this module:

  • plot_VS_Campbell
  • plot_MT_main_waves

How-to’s

Tutorials

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