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Motor control method

A technology of motor control and motor controller, applied in control systems, AC motor control, electrical components, etc., can solve problems such as difficulty in ensuring motors, different demand torques, and difficulty in adjusting the operation of horses and motors, and achieve stable transmission and stable speed , the effect of simple control steps

Inactive Publication Date: 2018-02-09
SICHUAN CHANGJIANG HYDRAULIC TIANCHENG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the VF control process, the combination of voltage and frequency is adjusted through the VF curve. Once adjustment is required, the two change at the same time. It is difficult to ensure that the control combination of voltage and frequency in each state of the motor is optimal.
During the operation of the motor, it will be affected by various factors (load, single deviation, working voltage, etc.), resulting in different torque requirements; generally, the output voltage and output frequency are judged by detecting the operation of the motor Is it normal? This method of adjustment makes it difficult to adjust the operation of the horse motor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The present invention provides a motor control method, comprising the following steps:

[0015] 1) Set the speed at which the motor needs to run and the voltage required for the motor to run on the motor controller;

[0016] 2) Start the motor and check whether the actual voltage and speed of the motor are consistent with the set values ​​in step 1). If yes, the motor controller does not need to adjust the voltage of the motor; if not, the motor controller adjusts the input motor The voltage and frequency of the motor make the speed of the motor reach a predetermined value;

[0017] 3) When the input voltage of the motor is consistent with the set value but the frequency is inconsistent, the motor controller adjusts the frequency of the input motor;

[0018] 4) When the input frequency of the motor is consistent with the set value but the voltage is inconsistent, the motor controller adjusts the voltage input to the motor.

[0019] In the above step 1), the motor cont...

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PUM

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Abstract

The invention discloses a motor control method. 1) The rotating speed required for operation of a motor and the voltage required for operation of the motor are set on a motor controller; and 2) the motor is started, whether the actual voltage and the rotating speed of the motor are consistent with the set values in the step 1) is checked, and the motor controller does not need to adjust the operation voltage of the motor if the checking result is yes; or the motor controller adjusts the voltage and the frequency inputted to the motor so that the rotating speed of the motor is enabled to reachthe preset value. The motor control method is simple in control steps and great in control effect, and the motor controller is arranged so that the rotating speed of the motor is enabled to be stableand stable transmission can be realized.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a motor control method. Background technique [0002] The power system composed of motor and belt is widely used in various equipment. In motor control, the combined control of output voltage and output frequency (VF control) is the most common and easiest way to implement. However, in the VF control process, the combination of voltage and frequency is adjusted through the VF curve. Once adjustment is required, the two will change at the same time. It is difficult to ensure that the control combination of voltage and frequency in each state of the motor is optimal. During the operation of the motor, it will be affected by various factors (load, single deviation, working voltage, etc.), resulting in different torque requirements; generally, the output voltage and output frequency are judged by detecting the operation of the motor Whether it is normal or not, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/04
CPCH02P27/047
Inventor 张勇
Owner SICHUAN CHANGJIANG HYDRAULIC TIANCHENG MACHINERY