Anti-interference permanent magnetic synchronous motor electric current loop control method

A technology of permanent magnet synchronous motor and control method, which is applied in the direction of single motor speed/torque control, etc., can solve the problem of weak suppression ability of back EMF disturbance, and achieve the effect of improving the ability of anti-noise interference

Active Publication Date: 2016-06-08
SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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Problems solved by technology

However, the suppression ability of the system to the back EMF disturbance is weak by using this method.

Method used

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  • Anti-interference permanent magnetic synchronous motor electric current loop control method
  • Anti-interference permanent magnetic synchronous motor electric current loop control method
  • Anti-interference permanent magnetic synchronous motor electric current loop control method

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0040] The invention provides an anti-interference permanent magnet synchronous motor current loop control method, such as Figure 5 As shown, first, a current sampling strategy of average sampling is proposed, which can effectively suppress noise and harmonic interference, and also determine the delay time constant of the system; then, introduce the back EMF into the current closed loop, and establish a new current control The model of the loop; finally, in order to eliminate the static error, a proportional double integral control is proposed and the controller parameters are tuned. The method of the invention improves the traditional control method from two aspects.

[0041] Considering that integration can effectively suppress harmonics and noise, in order to solve the problem of easy introduction of noise and harmonics when sampling the ...

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Abstract

The invention provides an anti-interference permanent magnetic synchronous motor electric current loop control method. The method makes some improvements based on a conventional control method from two aspects. First of all, a current sampling strategy of average sampling is brought forward, the method can effectively inhibit noise and harmonic interference, and at the same time, a time-delay time constant of a system is also determined; then, a counterelectromotive force is introduced into a current closed loop, and a model of a new current control loop is established; and finally, for the purpose of eliminating a static difference, proportional double-integration control is brought forward and controller parameters are set. The method provided by the invention can improve the anti-interference capability of a current loop and accordingly improves the performance of the current loop.

Description

technical field [0001] The invention relates to an AC permanent magnet synchronous motor servo system, in particular to an anti-interference permanent magnet synchronous motor current loop control method. Background technique [0002] Most permanent magnet synchronous motor servo systems adopt a three-loop control structure, the inner loop is the current loop, and the outer loop is the speed loop and position loop. In order to ensure fast tracking of position and speed commands, the current loop is required to have a fast electromagnetic torque response, and the dynamic response of the current loop affects the performance of the entire servo system. [0003] The interference of the current loop mainly comes from back EMF and current sampling. Since the current servo system with digital processor as the core uses PWM to control the motor, the voltage signal output by the inverter contains a large number of harmonics, so the current sampling is inevitably disturbed by noise a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08
Inventor 王志成赵志勇杜桂红孙宇陈猛王泽鹏
Owner SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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