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Motor control method and device

A motor control and current technology, which is applied in the direction of motor generator control, electromechanical transmission control, electronic commutation motor control, etc., can solve the problems of poor motor control effect, inability to track motor speed in time, and complexity

Inactive Publication Date: 2020-02-25
SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] For the existing motor control method, firstly, it goes through multiple processes such as determination of the initial value of the excitation current, calculation of the we

Method used

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  • Motor control method and device

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Embodiment Construction

[0077] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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 It is a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection of the present invention. scope.

[0078] Such as figure 1 As shown, the embodiment of the present invention provides a motor control method, the method may include the following steps:

[0079] Step 101: Obtain the command speed and estimated speed of the target motor, wherein the command speed is the speed required to control the operation of the target motor, and the estimated speed ...

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Abstract

The invention provides a motor control method and device. The motor control method comprises the following steps of: acquiring a command rotating speed and an estimated rotating speed of a target motor, detecting whether the rotating speed error is greater than a preset rotating speed error threshold value or not, if the duration that the rotating speed error is greater than the rotating speed error threshold value is larger than a preset duration threshold value, conducting flux-weakening PI adjustment on the rotating speed error to obtain a first direct-axis reference current, the first direct-axis reference current being a negative value, and the first direct-axis reference current and the rotating speed error being in negative correlation, determining a first direct-axis voltage and afirst quadrature-axis voltage according to the first direct-axis reference current, and controlling the target motor to operate according to the first direct-axis voltage and the first quadrature-axisvoltage. The scheme can improve the control effect of the motor.

Description

technical field [0001] The invention relates to the technical field of electromechanical engineering, in particular to a motor control method and device. Background technique [0002] Field-Oriented Control (FOC) is a technology for efficient control of brushless DC motors and permanent magnet synchronous motors. Field-Oriented Control can precisely control the magnitude and direction of the magnetic field, making the motor torque stable and low noise , high efficiency, and has a high-speed dynamic response. In the process of controlling motor operation based on field-oriented control technology, as the motor speed increases, the direct-axis voltage and quadrature-axis voltage output by the current PI regulator will increase accordingly, but because the current PI regulator usually has a limiting mechanism, Ensure that the output voltage value will not exceed the highest voltage that the inverter can provide. Therefore, when the direct-axis voltage and reference voltage out...

Claims

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Application Information

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IPC IPC(8): H02P21/18
CPCH02P21/0089H02P21/18
Inventor 任艳华唐婷婷王声纲朱绯杨正潘军
Owner SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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