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Speed fluctuation suppression method, control device and compressor control system

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

Active Publication Date: 2016-03-30
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 suppression method for a permanent magnet synchronous motor. The method comprises the following steps: obtaining a target rotating speed and a feedback rotating speed of the permanent magnet synchronous motor, and calculating a fluctuation rotating speed of the permanent magnet synchronous motor according to the target rotating speed and the feedback rotating speed; carrying out iterative learning control on the fluctuation rotating speed to obtain a compensation speed, and superposing the compensation speed to a given rotating speed in a previous control period of the permanent magnet synchronous motor to obtain the give rotating speed in the current control period; and controlling the permanent magnet synchronous motor to suppress rotating speed fluctuation of the permanent magnet synchronous motor according to the given rotating speed of the current control period. According to the control method, the compensation speed is obtained through iterative learning control on the fluctuation speed to correct the given speed of a speed ring, so that effective control on the speed fluctuation when the permanent magnet synchronous motor runs is achieved. The invention further discloses a control device for the permanent magnet synchronous motor, and a compressor control system with the control device.

Description

technical field [0001] The present invention relates to the technical field of PMSM (Permanent Magnet Synchronous Motor, permanent magnet synchronous motor) control, in particular to a speed fluctuation suppression method of a permanent magnet synchronous motor, a control device of a permanent magnet synchronous motor and a control device with the permanent magnet synchronous motor The compressor control system of the installation. 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 ...

Claims

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Application Information

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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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