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A motor control method and a motor control device

A technology of motor control and motor start, applied in motor generator control, control system, electrical components, etc., can solve the problems of slow system response, affecting the efficiency of electronic expansion valve, and increasing energy consumption.

Active Publication Date: 2021-08-24
HANGZHOU SANHUA RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the motor control method is to set a fixed speed for the motor to meet all working conditions. This method can ensure that the motor does not lose synchronization when the pressure at the inlet and outlet of the electronic expansion valve is the highest, but when the pressure difference between the inlet and outlet of the electronic expansion valve is large Continuing to control the motor at the nominal speed when it is low will cause slow system response, long running time, increased energy consumption, and affect the efficiency of the electronic expansion valve

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  • A motor control method and a motor control device
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  • A motor control method and a motor control device

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Embodiment Construction

[0014] In order to enable those skilled in the art to better understand the solutions of the present invention, 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 are only 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.

[0015] First of all, it should be explained that the motor control method and the motor control device provided by the embodiments of the present invention can be applied to the on-board control system to control the opening and closing degree of the electronic expansion valve, and can also be applied to other systems including a motor control uni...

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Abstract

The invention discloses a motor control method. The method includes: sending a pulse signal to the motor to control the start of the motor; receiving a Hall signal sent by a Hall sensor; judging according to the Hall signal and the pulse signal Whether the motor is out of step; when the motor is not out of step, increase the frequency of the pulse signal, which can increase the running speed of the motor, thereby improving the efficiency of the motor and reducing energy consumption.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a motor control method and device. Background technique [0002] In the vehicle's air conditioning system, the electronic expansion valve is used to precisely adjust the flow of refrigerant, so the pressure difference between the inlet and outlet of the electronic expansion valve will vary greatly with the working conditions and the control strategy of the air conditioner. The difference is directly proportional. When the load is constant and the motor speed of the electronic expansion valve is constant, if the current of the electronic expansion valve is too small, the motor will lose step, and if the current is too large, it will cause waste of energy and increase the heat of the motor. Therefore, how to accurately control the current of the electronic expansion valve to reduce energy waste and unnecessary heat generation is a problem that those skilled in the art must f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P8/10H02P8/12H02P8/16H02P8/38
CPCH02P8/10H02P8/12H02P8/16H02P8/38
Inventor 不公告发明人
Owner HANGZHOU SANHUA RES INST CO LTD