Analysis method for the influence of inverter harmonics on the vibration and noise of permanent magnet synchronous motors for vehicles
A permanent magnet synchronous motor, vibration and noise technology, applied in the direction of AC motor control, electrical components, control systems, etc., can solve the problem of deteriorating vibration and noise of permanent magnet synchronous motors, and achieve the effect of effective analysis
Active Publication Date: 2021-09-07
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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[0003] The present invention aims at the problem that inverter harmonics deteriorate the vibration and noise of permanent magnet synchronous motors, and proposes an analysis method for the influence of inverter harmonics on the vibration and noise of permanent magnet synchronous motors for vehicles, and analyzes the influence of inverter harmonics on the vibration and noise of permanent magnet synchronous motors for vehicles. The influence of vibration and noise of permanent magnet synchronous motors provides a theoretical basis for the design of permanent magnet synchronous motors
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[0065] Such as figure 1 The flow diagram of the method for analyzing the vibration and noise source of the permanent magnet synchronous motor with wide range speed regulation is shown, which specifically includes the following steps:
[0066] Step 1. Theoretical analysis of the permanent magnet synchronous motor PMSM electromagnetic force wave characteristic parameters (force wave order r, force wave frequency f r , force wave amplitude ) and the harmonic sources of force waves of each order.
[0067] 1.1 Deduce the air gap magnetic field of permanent magnet synchronous motor, without considering the influence of iron core reluctance and saturation, the expression of air gap magnetic density when the sinusoidal current is powered is:
[0068]
[0069] Among them, f μ (θ,t) = F μ cos(μpθ-μωt) is the harmonic magnetomotive force of the μ-th rotor permanent magnet, μ=1,3,5..., p is the number of pole pairs of the motor, ω is the angular frequency of the fundamental magnet...
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The invention relates to a method for analyzing the influence of inverter harmonics on the vibration and noise of a permanent magnet synchronous motor for vehicles, and analyzes the vibration and noise of the permanent magnet synchronous motor for vehicles caused by inverter harmonics. Firstly, a multi-physics PMSM vibration and noise analysis model of permanent magnet synchronous motor is established, and the characteristic parameters of PMSM electromagnetic force waves and the harmonic sources of each order of force waves are theoretically analyzed. The characteristic parameters include force wave order r, force wave frequency f r and force wave amplitude P eak ‑r / f r , established the PMSM multi-physics coupling vibration analysis finite element model, calculated the current and electromagnetic force spectrum of the prototype under constant torque speed regulation and weak field speed regulation, and analyzed the vibration and noise spectrum characteristics of different current sources. Theories and simulations are verified. The analysis method of the invention can be extended to the general integer-slot multi-pole logarithmic electric vehicle PMSM, and provides a theoretical basis for the design of the electric vehicle low vibration and noise PMSM.
Description
technical field [0001] The invention relates to a vibration and noise analysis technology of a permanent magnet synchronous motor, in particular to a method for analyzing the influence of inverter harmonics on the vibration and noise of a permanent magnet synchronous motor for vehicles. Background technique [0002] Integer slot PMSM (Permanent Magnet Synchronous Motor) is widely used in electric vehicles due to its high power density, wide speed range, and high efficiency. However, the electromagnetic vibration noise caused by inverter harmonics will reduce the ride comfort and operational reliability of electric vehicles. Therefore, it is of great significance to analyze the influence of inverter harmonics on the vibration and noise of permanent magnet synchronous motors for vehicles, and to guide the optimization design of motor electromagnetic or structure, which is of great significance to improve the comfort, reliability and operation stability of electric vehicles. ...
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IPC IPC(8): H02P27/06
CPCH02P27/06
Inventor李晓华田晓彤刘成健汪月飞吕舒艺章李烽赵文彬李峰
OwnerSHANGHAI UNIVERSITY OF ELECTRIC POWER