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Permanent magnet motor torque compensation method and device

A technology of torque compensation and permanent magnet motor, which is applied in the direction of motor control, AC motor control, motor vibration suppression control, etc., can solve the problems of insufficient compensation, poor compensation effect, poor adaptability, etc., and achieve the goal of self-adaptive compensation Effect

Active Publication Date: 2018-12-28
GREE ELECTRIC APPLIANCES INC
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AI Technical Summary

Problems solved by technology

In the prior art, the torque feedforward compensation has the following two methods: (1) According to the predetermined torque compensation curve, it is solidified into the table. Using this method, the compensation curve needs to be re-corrected for different compressors to adapt to Poor sex
(2) Using online calculation, when using the online compensation method, the compensation strength is often insufficient, and the load torque uses an open-loop calculation method, which is easy to introduce large interference, resulting in poor compensation effect

Method used

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  • Permanent magnet motor torque compensation method and device
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  • Permanent magnet motor torque compensation method and device

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Embodiment Construction

[0031] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

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Abstract

The invention provides a permanent magnet motor torque compensation method and device. The method comprises the steps that the driving torque of a motor is acquired; the load torque of the motor is obtained according to the first rotating speed signal of the motor; compensation amount is obtained according to the driving torque and the load torque; and a compensation signal used for representing the compensation amount is outputted to the motor. Therefore, compensation for the load torque of the motor is enabled to be determined according to the load torque and the driving torque so as to realize self-adaptive compensation for the load torque of the motor.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a torque compensation method and device for a permanent magnet motor. Background technique [0002] At present, the variable frequency air conditioner compressor widely adopts the control method of permanent magnet synchronous motor without position sensor. For single-rotor inverter compressors, due to its periodic suction and discharge, the load torque is unbalanced, which is easy to cause vibration. Especially at low frequencies, the vibration phenomenon is more obvious, resulting in greater pipeline stress and noise. [0003] For this reason, torque feed-forward compensation is widely used in single-rotor variable frequency compressors to reduce vibration. In the prior art, the torque feedforward compensation has the following two methods: (1) According to the predetermined torque compensation curve, it is solidified into the table. Using this method, the compensation curve need...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P23/14H02P23/12H02P23/04H02P25/022
CPCH02P23/0022H02P23/04H02P23/12H02P23/14H02P2207/05
Inventor 黄翰庞伟宋德超
Owner GREE ELECTRIC APPLIANCES INC
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