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Control method and control system of motor

A control method and technology of a control system, applied in the control system of a motor and the control field of a motor, can solve the problems of lack of phase protection, inability to operate safely and reliably, and overcurrent, and achieve the effect of safe and reliable operation and avoiding overcurrent faults of the motor.

Active Publication Date: 2015-03-04
MIDEA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, a large number of experiments have shown that when the air conditioner operates at high temperature, there are many problems exposed, such as overcurrent, stall, phase loss protection, overvoltage protection, etc.
Therefore, when the compressor motor is running in a relatively harsh environment, it is prone to failures such as stall and overcurrent caused by abnormal current, so that it cannot run safely and reliably.

Method used

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  • Control method and control system of motor
  • Control method and control system of motor
  • Control method and control system of motor

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Embodiment Construction

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0036] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicat...

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Abstract

The invention discloses a control method of a motor. The control method comprises the following steps that: the rotation speed of the motor is detected; the change rate of the rotation speed of the motor is calculated according to the detected rotation speed of the motor and the given rotation speed of the motor; and when the change rate of the rotation speed of the motor is greater than a preset value, the proportional-integral parameter of a speed ring in a control system of the motor is adjusted, and amplitude reduction adjustment is performed on the q-axis current upper limit of the motor. With the control method of the motor adopted, over-current or stall faults of the motor which are caused by abnormal current can be avoided, and safe and reliable operation of the motor in a low-frequency and heavy-load state and in an entire operation process can be ensured. The invention also discloses a control system of the motor.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a motor control method and a motor control system. Background technique [0002] The quality of the vector control of the compressor motor has a direct impact on the performance and reliability of the entire air conditioner. Due to the scattered customer groups, the temperature difference in the place where the air conditioner is installed will be relatively large, which makes the operating conditions of the air conditioner very complicated. Therefore, the air conditioner needs to be able to operate stably and reliably in different environments, which requires the compressor motor in the air conditioner to be able to operate stably under different working conditions. [0003] However, a large number of experiments have shown that when the air conditioner is running at high temperature, there are many problems exposed, such as overcurrent, stall, phase loss protection, over...

Claims

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Application Information

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IPC IPC(8): H02P21/00
Inventor 陈毅东
Owner MIDEA GRP CO LTD
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