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Permanent magnet synchronous motor system based on measurement error compensator and compensation method

A permanent magnet synchronous motor, measurement error technology, applied in vector control systems, control systems, control generators, etc., can solve the problems of motor speed and torque ripple, errors, etc., to suppress interference, improve dynamic control performance, and improve The effect of stability

Pending Publication Date: 2019-04-02
XUCHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before the stator current is sent to the controller, it needs to go through the current sampling and conditioning process. In this process, errors will inevitably be introduced, and the current measurement error will cause the motor speed and torque to pulsate.

Method used

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  • Permanent magnet synchronous motor system based on measurement error compensator and compensation method
  • Permanent magnet synchronous motor system based on measurement error compensator and compensation method
  • Permanent magnet synchronous motor system based on measurement error compensator and compensation method

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Embodiment Construction

[0031] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "serial", "access", and similar expressions u...

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Abstract

The invention discloses a surface-mounted permanent magnet synchronous motor system based on a current measurement error compensator. A permanent magnet synchronous motor current measurement error compensation controller obtains a pure current measurement error component by subtracting a low-pass filtered current instruction from the measured current in a two-phase stationary [alpha][beta] coordinate system, thereby avoiding motor speed and torque pulsation caused by the motor current measurement error. In addition, through the simple subtraction, the interference of the current instruction incorrecting the current offset error is conveniently eliminated, and the dynamic control capability of the current measurement error compensator is greatly improved. The permanent magnet synchronous motor system is insensitive to changes in electrical parameters, can suppress the interference of an outer loop controller, and is good in dynamic stability, simple in structure and easy to implement.

Description

technical field [0001] The invention relates to the technical field of motor control, and relates to a current error compensator for a surface-mounted permanent magnet synchronous motor, in particular to a surface-mounted permanent magnet synchronous motor system and a surface-mounted permanent magnet synchronous motor system based on a current measurement error compensator. Current error compensation method for permanent magnet synchronous motor. Background technique [0002] In recent years, permanent magnet synchronous motors have gradually become the mainstream of AC servo motors due to their advantages such as simple structure, high power density, high torque-to-current ratio, and easy maintenance. The permanent magnet synchronous motor is a complex system with nonlinear, strong coupling, and time-varying parameters. It is often subject to strong external interference during operation. Therefore, it is very difficult to achieve high-precision servo control of the perman...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P21/22H02P6/28H02P6/08H02P6/10
CPCH02P21/14H02P6/08H02P6/10H02P6/28H02P21/22
Inventor 王红艳陈静方如举葛瑜张飞云
Owner XUCHANG UNIV
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