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Compensate control method for AC servo motor moment disturbance

An AC servo motor, compensation control technology, applied in the direction of motor generator control, electronic commutation motor control, control system, etc., to overcome the influence of electromagnetic torque changes or periodic changes in load torque, improve stability accuracy, simple and effective implementation Effect

Active Publication Date: 2006-06-14
桂林星辰科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the hysteresis of the feedback control, the speed inevitably fluctuates up and down due to the influence of the torque disturbance

Method used

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  • Compensate control method for AC servo motor moment disturbance
  • Compensate control method for AC servo motor moment disturbance

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] In the specific embodiment of the compensation control method for the torque disturbance of the AC servo motor of the present invention, the servo driver and the speed and torque dual-loop control are adopted, and the speed servo control of the motor is performed by controlling the three-phase current vector. The principle block diagram is as follows figure 1 Shown.

[0009] The first step is to obtain the law of the reluctance stress change before the compensation control, that is, find the law of the reluctance stress experienced by the motor rotor at different positions and other periodic disturbance torque changes on the motor shaft.

[0010] The method to obtain the law of magnetoresistance stress change is: do not apply periodic disturbance torque compensation to the servo drive, control the motor to rotate slowly at a uniform speed for one cycle, and record the amplitude of the control output of the drive speed loop to obtain figure 2 The relationship between the ro...

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Abstract

The invention relates to a servo-driver for realizing compensate control method for AC servo motor moment disturbance, wherein speed and torque double ring control is employed to fine the variance rule of the torque disturbance before conducting compensate control, the rule information is then stored into the servo-driver, which feeds the controlling quantity signal directly into the initialized port of the torque ring.

Description

(1) Technical field [0001] The invention relates to a control method of an AC servo motor, in particular to a compensation control method of AC servo motor torque disturbance. (2) Technical background [0002] In AC servo motors, there are many factors that periodically perturb the output torque: such as the asymmetry of the rotor magnetic pole mechanical structure, the distribution of stator and rotor cogging, and the unilateral magnetic pull caused by the non-concentric installation of the stator and rotor. These are generally called magnetoresistive stresses. Reluctance stress is related to the position of the rotor, so it changes periodically with the rotation of the rotor. In addition, there are periodic torque fluctuations that may be caused by the load on the shaft. The servo drive generally controls the angle of the three-phase current vector or the stator and rotor magnetic field vectors to keep the torque output by the motor in the best working state. Due to the existen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00
Inventor 吕虹
Owner 桂林星辰科技股份有限公司