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

Active Publication Date: 2013-09-11
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides an automatic torque compensation method and an automatic torque compensation system, which are used to solve the technical problem of fluctuations in the rotational speed of the rotor of the permanent magnet motor in the prior art

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  • Method and system for automatically compensating torque

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Embodiment Construction

[0051] Embodiments of the present invention provide an automatic torque compensation method and an automatic torque compensation system, which are used to solve the technical problem of fluctuations in the rotational speed of a rotor of a permanent magnet motor in the prior art.

[0052] The technical solution in the embodiment of the present application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0053] Determining the specified frequency f of the permanent magnet motor * A frequency difference Δf from an actual frequency f; determining a phase angle θ of a rotor of the permanent magnet motor; determining a d-axis current command value I of the permanent magnet motor based on the frequency difference Δf and the phase angle θ d * and the q-axis current command value of the permanent magnet motor I q * ; Based on the d-axis current command value I d * and the q-axis current command value I q * The torque controlling the rotor...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/05
Inventor 钟明陈跃涂小平刘启武
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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