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A method and system for suppressing common-mode noise of an asymmetrical six-phase AC motor

A technology of AC motor and common mode noise, which is applied in the direction of AC motor control, control system, vector control system, etc. It can solve the problems of shortened service life of the motor, increase of electromagnetic interference noise, damage of motor components, etc., and achieves strong versatility and eliminates Common mode noise, effect of improving system reliability

Active Publication Date: 2020-11-24
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a method for suppressing the common-mode noise of an asymmetric six-phase AC motor, which aims to solve the problem of system electromagnetic interference noise caused by the common-mode voltage of the asymmetric six-phase AC motor. increase, the motor components are continuously damaged, which leads to the problem of shortening the service life of the motor

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  • A method and system for suppressing common-mode noise of an asymmetrical six-phase AC motor
  • A method and system for suppressing common-mode noise of an asymmetrical six-phase AC motor
  • A method and system for suppressing common-mode noise of an asymmetrical six-phase AC motor

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[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] The invention provides a method and system for suppressing common-mode noise of an asymmetrical six-phase AC motor, the purpose of which is to suppress the common-mode noise of an asymmetrical six-phase AC motor system, protect motor bearings, and improve system reliability.

[0042] refer to figure 1 A method for suppressing common-mode noise of an asymmetrical six-phase AC motor provided by the present invention comprises the following steps:

[0043](1) Calculate the reference voltage of each phase of the first three-phase inverter and the reference voltage of each phase of the second th...

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Abstract

The invention discloses a method and system for suppressing the common mode noise of an asymmetrical six-phase AC motor. Phase, so that the two sets of three-phase inverters driving the asymmetric six-phase AC motor output common-mode voltages with opposite amplitudes, so as to eliminate the total common-mode voltage input from the inverter to the asymmetric six-phase AC motor, thereby suppressing the non-symmetrical six-phase AC motor. Common mode noise generated by symmetrical six-phase motors; at the same time, the control method and system of the present invention do not require additional hardware, and can be realized only by improving software algorithms, have strong versatility, can protect motor bearings, and improve system reliability.

Description

technical field [0001] The invention belongs to the technical field of motor control, and more specifically relates to a method and system for suppressing common-mode noise of an asymmetrical six-phase AC motor. Background technique [0002] Compared with the three-phase AC motor, the asymmetric six-phase motor can increase the motor capacity due to the increase in the number of phases; at the same time, the asymmetric six-phase motor can eliminate the torque ripple caused by the 5th and 7th harmonics in the three-phase motor, reducing The torque ripple of the small motor; in addition, the asymmetric six-phase motor has more degrees of control freedom, which can realize the fault-tolerant operation of the motor under phase loss and fault, and improve the reliability of the system. Based on the above characteristics, asymmetric six-phase AC motors are widely used in fields requiring high power and high reliability such as ship electric propulsion, aerospace and electric vehic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P27/08
CPCH02P21/50H02P27/08H02P25/22H02P27/085
Inventor 蒋栋沈泽微刘自程叶东林李健曲荣海
Owner HUAZHONG UNIV OF SCI & TECH
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