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Motor control method and system, and motor

A technology of motor control and motor stator, applied in control system, vector control system, motor generator control, etc., can solve the problems of low precision and poor anti-interference ability, and achieve the effect of fast tracking

Active Publication Date: 2019-04-19
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the accuracy of the existing extended state observer is not high, and the anti-interference ability is poor

Method used

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  • Motor control method and system, and motor
  • Motor control method and system, and motor
  • Motor control method and system, and motor

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Embodiment Construction

[0067] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0068] like figure 1 As shown, the present invention provides a motor control method, the method comprising:

[0069] Collect the three-phase current at the stator end of the motor;

[0070] Obtain the two-phase voltage of the motor according to the three-phase current and the stator resistance;

[0071] determining an extended back EMF es...

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Abstract

The invention relates to a motor control method and system, and a motor. The motor control method includes the steps: collecting three-phase current of a stator end of the motor; obtaining two-phase voltage of the motor according to the three-phase current; determining an extended back electromotive force estimated value through the two-phase voltage of the motor; and controlling the extended backelectromotive force by means of phase locked loop to obtain a motor feedback rotating speed; and controlling the motor according to the motor feedback rotating speed. The technical solution providedby the motor control method determines the feedback rotating speed of the motor according to the extended back electromotive force to control the motor, improves the observation accuracy of the back electromotive force, accelerates the dynamic response speed and the anti-interference ability at the same time, and can quickly track changes of the rotor position and the rotating speed by using the phase locked loop position tracker.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a motor control method, system and motor. Background technique [0002] The permanent magnet synchronous motor has the advantages of simple structure, small size, high efficiency and high power factor. At present, permanent magnet synchronous motors have been used in the metallurgical industry (ironworks and sintering plants, etc.), ceramics industry (ball mill), rubber industry (internal mixer), petroleum industry (pumping unit), textile industry (two-for-one twister, spinning machine) Machine) and other industries in the medium and low voltage motors to obtain performance, and gradually accumulate design and operating experience. [0003] The starting and running of the permanent magnet synchronous motor is formed by the interaction of the magnetic field generated by the stator winding, the rotor squirrel cage winding and the permanent magnet. When the motor is at rest, a three-p...

Claims

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Application Information

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IPC IPC(8): H02P21/13
CPCH02P21/13
Inventor 郭清风张有林宋泽琳米雪涛
Owner GREE ELECTRIC APPLIANCES INC