Method and system for automatically compensating torque

A torque compensation and automatic compensation technology, applied in the control system, vector control system, motor generator control and other directions, can solve the problem of rotation speed fluctuation, achieve the effect of stable rotation speed and prevent vibration and noise problems
CN103296958AActive Publication Date: 2013-09-11SICHUAN CHANGHONG ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN CHANGHONG ELECTRIC CO LTD
Publication Date
2013-09-11

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Abstract

The invention discloses a method and a system for automatically compensating torque. The method and the system aim to solve the technical problem of fluctuation of the rotation speed of a permanent magnet motor in the prior art. The method is applied to a permanent magnet motor, and includes determining the frequency difference delta f between a specified frequency f<*> and an actual frequency f of the permanent magnet motor; determining a phase angle theta of a rotor of the permanent magnet motor; determining a torque compensation quantity for the rotor of the permanent magnet motor on the basis of the frequency difference delta f and the phase angle theta, and determining a current instruction value I<d><*> of a shaft d of the permanent magnet motor and a current instruction value I<q><*> of a shaft q of the permanent magnet motor by the aid of the torque compensation quantity; controlling and adjusting the torque of the rotor of the permanent magnet motor from a first value to a second value different from the first value on the basis of the current instruction value I<d><*> of the shaft d and the current instruction value I<q><*> of the shaft q.
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Description

technical field

[0001] The invention relates to the technical field of air conditioning control, in particular to an automatic torque compensation method and an automatic torque compensation system. Background technique

[0002] An electric motor is a rotary electric machine that converts electrical energy into mechanical energy. It mainly includes an electromagnet winding or distributed stator winding for generating a magnetic field and a rotating armature or rotor. Under the action of the rotating magnetic field of the stator winding, a current passes through the armature squirrel-cage aluminum frame and is subjected to the action of the magnetic field to make it rotate.

[0003] Among them, during one cycle of the operation of the rotor of the permanent magnet synchronous single-rotor DC motor (especially the single-rotor air-conditioning compressor), due to the change of the pressure in the compressor cylinder, the center of gravity of the rotor is shifted, so that the r...

Claims

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