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A multi-phase motor driver control method

A multi-phase motor and control method technology, applied in the direction of AC motor control, control system, electrical components, etc., can solve the problems of complex engineering implementation, large calculation amount of space vector modulation method, and inability to effectively eliminate the influence of common mode voltage, etc., to achieve The effect of canceling the common mode voltage

Active Publication Date: 2020-03-31
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The space vector modulation method has a large amount of calculation, and the engineering implementation is relatively complicated
The carrier modulation method is simple to implement, but there are certain problems in the existing control methods, such as the inability to effectively eliminate the influence of common-mode voltage

Method used

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  • A multi-phase motor driver control method
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  • A multi-phase motor driver control method

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0023] A kind of multi-phase motor driver control method of the present invention, the content of this method is as follows:

[0024] The multi-phase motor driver is composed of 2n-phase inverters, where n is a natural number, such as figure 1 As shown, among them, the first phase bridge arm and the second phase bridge arm are controlled by the first module 1, the third phase bridge arm and the fourth phase bridge arm are controlled by the second module, ..., and so on, the 2n-1th The phase bridge arm and the 2nth phase bridge arm are controlled by the nth module.

[0025] When selecting n=3 below, specify the control method of the present invention, as figure 2 As shown, the implementation steps of the control method are as follows:

[0026] In the control of the first module, the first modulation wave is subtracted from the second modulati...

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Abstract

The present invention relates to the field of motor drivers, in particular to a method for controlling a multi-phase motor driver. The multi-phase motor driver is composed of 2n-phase inverters, where n is a natural number, wherein the first and second phase bridge arms are controlled by the first module; 3. The 4-phase bridge arm is controlled by the second module; and so on, the 2n-1, 2n-phase bridge arm is controlled by the nth module; in the control of the first module, the first modulation wave and the second modulation wave are subtracted, and then combined with The first carrier compares to generate the control signal of the first module; when the difference between the first modulation wave and the second modulation wave is greater than the first carrier 1, the upper switch of the first phase bridge arm and the lower switch of the second phase bridge arm are turned on, at this time If the current of the first phase bridge arm is less than 0, the upper switch of the first phase bridge arm is turned off, and only the lower switch of the second phase bridge arm is turned on; at this time, if the current of the second phase bridge arm is greater than 0, the second phase bridge arm The lower switch is turned off, and only the upper switch of the first phase bridge arm is turned on. The present invention can eliminate the system common mode voltage only by modulating wave operation and carrier comparison to generate control signals.

Description

technical field [0001] The invention relates to the field of motor drivers, in particular to a control method for multi-phase motor drivers. Background technique [0002] The traditional three-phase motor drive system has been widely used at present, and the technology is relatively mature, but there are some disadvantages. With the development of power electronics technology, the motor drive system is no longer limited by the number of power supply phases, and the control of multi-phase motors and their drivers has become a research hotspot. Compared with the traditional three-phase motor drive system, the multi-phase motor drive system has more degrees of control freedom, good torque control performance and fault tolerance performance, etc., in the fields of electric vehicles, military ships, rail transit and aerospace It has advantages and broad application prospects. [0003] In practical applications, there are two control methods for multiphase motor drivers, one is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/06H02M7/537
CPCH02M7/537H02P27/06H02M1/123
Inventor 郭小强
Owner YANSHAN UNIV
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