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Speed ​​fluctuation suppression method, control device and compressor control system

A speed fluctuation and control device technology, applied in the control system, vector control system, motor generator control, etc., can solve the problems of low system reliability and complex algorithm implementation, and achieve low control model dependence, simple and reliable control, Effective suppression of speed fluctuations

Active Publication Date: 2018-04-10
ANHUI MEIZHI PRECISION MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 3. Use torque compensation, specific harmonic elimination and other control methods to suppress speed fluctuations. The algorithm implementation of this type of control method is relatively complicated, and the system reliability is relatively low

Method used

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  • Speed ​​fluctuation suppression method, control device and compressor control system
  • Speed ​​fluctuation suppression method, control device and compressor control system
  • Speed ​​fluctuation suppression method, control device and compressor control system

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Embodiment Construction

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0033] First, let's briefly describe the vector control system of the permanent magnet synchronous motor in the prior art. The vector control system of the existing permanent magnet synchronous motor in the d-axis target current When the control principle block diagram is as follows figure 1 As shown, the double closed-loop control of the outer loop speed and the inner loop current is adopted, in which, the speed loop is generally set with a lower bandwidth, which is determined by the kinematic equation of the permanent magnet ...

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Abstract

The invention discloses a speed fluctuation suppressing method of a permanent magnet synchronous motor, which comprises the following steps: obtaining the target rotational speed and the feedback rotational speed of the permanent magnet synchronous motor, and calculating the fluctuation rotational speed of the permanent magnet synchronous motor according to the target rotational speed and the feedback rotational speed; The speed is iteratively learned and controlled to obtain the compensation speed, and the compensation speed is superimposed on the given speed of the previous control cycle of the permanent magnet synchronous motor to obtain the given speed of the current control cycle; according to the given speed of the current control cycle The magnetic synchronous motor is controlled to suppress the speed fluctuation of the permanent magnet synchronous motor. The suppression method obtains the compensation speed by performing iterative learning control on the fluctuation speed to correct the given speed of the speed loop, so as to effectively suppress the speed fluctuation of the permanent magnet synchronous motor during operation. The invention also discloses a control device of the permanent magnet synchronous motor and a compressor control system with the same.

Description

technical field [0001] The present invention relates to the field of PMSM (Permanent Magnet Synchronous Motor, permanent magnet synchronous motor) control technology, in particular to a speed fluctuation suppression method for a permanent magnet synchronous motor, a control device for a permanent magnet synchronous motor, and a permanent magnet synchronous motor. The compressor control system of the motor control device. Background technique [0002] When the permanent magnet synchronous motor is running at low frequency, the speed fluctuates greatly due to the unbalanced load, which brings noise and vibration to the entire system, affects the reliability of the system, and reduces the comfort of users. The speed fluctuation of the motor is suppressed. [0003] In the related art, there are the following problems in the control technology of the permanent magnet synchronous motor: [0004] 1. Double closed-loop control based on classical control theory In order to enable t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/10H02P6/06H02P21/05
Inventor 刘超丛任新杰宋万杰王世超杜鑫龙
Owner ANHUI MEIZHI PRECISION MFG
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