A Noise Control Method for Permanent Magnet Synchronous Motor of New Energy Vehicle Based on Harmonic Injection
A technology for permanent magnet synchronous motors and new energy vehicles, which is applied in the direction of motor generator control, electronic commutation motor control, control systems, etc., and can solve the problem of ineffective noise control of permanent magnet synchronous motors and the lack of noise control methods and means and other issues, to achieve the effect of convenient control and operation
Active Publication Date: 2021-11-05
BEIJING INSTITUTE OF TECHNOLOGYGY +2
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Problems solved by technology
At present, the noise control effect of permanent magnet synchronous motors is not effective. The main reason is that motor manufacturers and automobile manufacturers have not adopted appropriate noise control methods and means, and have not taken effective control of the main sound source of motors - electromagnetic noise measure
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[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.
[0020] The theoretical method is used to derive the analytical expression of the electromagnetic excitation force wave of the permanent magnet synchronous motor, as shown in formula (7):
[0021]
[0022] In formula (7): F r (θ,t) is the electromagnetic excitation force; μ 0 is air permeability; C μ is the magnetomotive force amplitude; Λ 0 is a constant component of the permeability function; Λ k is the harmonic component of the permeability function; μ is the order of time harmonics; ν is the order of space harmonics; p is the number of pole pairs of the motor; ω is the angular frequency of motor rotation; t is time; Z is the number of stator slots; θ...
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The invention provides a method for controlling electromagnetic noise of a permanent magnet synchronous motor of a new energy vehicle based on harmonic injection. The specific process is: (1) constructing an equivalent model of the motor control system, and obtaining the three-phase current output by the equivalent model; (2) For each phase current, extract the amplitude and phase corresponding to the first 8 harmonic components with the largest amplitude; (3) For each phase current, use the amplitude and phase extracted in step (2) to construct a current simulation The resultant function is fed back to the current excitation of the synchronous motor. The invention can effectively control the electromagnetic noise of the motor from the noise source by constructing a current fitting function and injecting it into the current excitation, and has the effect of convenient, fast, simple and correct vibration and noise control operation.
Description
technical field [0001] The invention belongs to the technical field of new energy vehicles, in particular to a method for controlling noise of a new energy vehicle motor based on harmonic injection. Background technique [0002] The noise generated by the new energy vehicle motor during operation is the superposition of aerodynamic noise, electromagnetic noise and mechanical noise, of which electromagnetic noise energy accounts for a large part of it. At present, the noise control effect of permanent magnet synchronous motors is not effective. The main reason is that motor manufacturers and automobile manufacturers have not adopted appropriate noise control methods and means, and have not taken effective control of the main sound source of motors - electromagnetic noise measure. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of the prior art, in order to effectively control the electromagnetic noise of the motor from the...
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IPC IPC(8): H02P21/05
CPCH02P21/05
Inventor 李惠彬李耀健曹诚张炟严小俊胡冬枚胡志宏宋志环
Owner BEIJING INSTITUTE OF TECHNOLOGYGY