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Motor control method and control system thereof

A control system and control method technology, applied in the field of motor control and motor control systems, can solve problems such as unsafe and reliable operation, phase loss protection, overvoltage protection, etc., and achieve the goal of avoiding motor overcurrent faults and safe and reliable operation Effect

Active Publication Date: 2017-09-22
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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  • Motor control method and control system thereof
  • Motor control method and control system thereof
  • Motor control method and control system thereof

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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 motor control method, comprising the following steps: detecting the rotational speed of the motor; calculating the rotational speed change rate of the motor according to the detected rotational speed of the motor and a given rotational speed of the motor; when the rotational speed change rate of the motor is greater than a preset value , adjust the proportional-integral parameter of the speed loop in the motor control system, and adjust the lower limit of the q-axis current upper limit of the motor. The control method of the motor avoids motor overcurrent or stall failure caused by abnormal current, and ensures safe and reliable operation of the motor under low-frequency heavy load and during the entire operation process. The invention also discloses a motor control system.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H02P29/032H02P29/10H02P21/22
Inventor 陈毅东
Owner MIDEA GRP CO LTD
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