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Current feedforward control method and device based on proportional integral coefficient adjustment

A current feed-forward, proportional-integral technology, applied in the control of electromechanical transmission, motor generator control, electronic commutation motor control, etc., can solve the problems of signal command amplitude distortion, feedforward signal amplitude and phase deviation, etc.

Active Publication Date: 2018-10-26
上海频控科技有限公司
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Problems solved by technology

[0016] The traditional low-pass filter current feedforward command i is obtained by the above method f(k) , where the low-pass filtering time coefficient τ often requires engineering experience to determine the value, and the low-pass filtering will cause amplitude distortion of the signal command, such as figure 2 As shown, the amplitude and phase of the feedforward signal processed by the low-pass filter signal have deviations

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  • Current feedforward control method and device based on proportional integral coefficient adjustment
  • Current feedforward control method and device based on proportional integral coefficient adjustment
  • Current feedforward control method and device based on proportional integral coefficient adjustment

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Embodiment Construction

[0126] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0127] The structural diagram of the current feedforward control method based on proportional integral coefficient adjustment is as follows: image 3 shown, including:

[0128] The permanent magnet synchronous motor unit 1, the stator of the permanent magnet synchronous motor unit 1 receives the pulse width modulation waveform output by the power modulation unit 14, and drives the rotor to rotate;

[0129] The encoder unit 2 is used to measure the current position of the rotation angle of the rotor of the permanent magnet synchronous motor unit 1, and output the mechanical rotation angle θ of the rotor of the permanent magnet synchronous motor unit m ;

[0130] An electrical angle conversion unit 3, used to convert the mechanical angle θ obtained by the encoder unit 2 m Converted to the electrical angle θ used for the calculation of the space vector coordin...

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Abstract

Embodiments of the invention relate to a current feedforward control method and device based on proportional integral coefficient adjustment for improving the response speed of a speed ring of an AC servo drive control system. The current feedforward structure can realize the independent calculation of a current feedforward instruction without being affected by the external disturbance, referenceis made to a feedback control system model in the establishment of a current feedforward model, the calculation accuracy of the current feedforward instruction of the control system is improved, and compared with the traditional current feedforward system based on flow pass filtering, the novel current feedforward system has better instruction tracking capability, eliminates the distortion causedby the low pass filtering feedforward to the instruction filtering and effectively improves the response speed tracking capability of the control system.

Description

technical field [0001] The present invention is mainly aimed at the control process of permanent magnet synchronous motors, and is a current feedforward control method and device based on proportional integral coefficient adjustment. The method and device can effectively eliminate the distortion problem caused by traditional low-pass filtering to current feedforward commands , to improve the response speed of the speed loop of the control system. Background technique [0002] In order to ensure the smooth and stable input of the current feedforward command, the traditional current feedforward command system performs low-pass filter calculation on the current feedforward command, and the upper computer inputs the current command i ref , get the current loop acceleration command a after calculation and processing ref , after the low-pass filter link, the acceleration feed-forward command a is obtained f , and then according to the moment of inertia J of the permanent magnet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22H02P21/00
CPCH02P21/0003H02P21/22
Inventor 王磊任齐民张洪鑫张永德
Owner 上海频控科技有限公司
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