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High precision torque control method for three-phase asynchronous motor

A three-phase asynchronous, electric motor technology, applied in the direction of motor generator control, electronic commutation motor control, control of generators, etc., can solve the problem of difficult adjustment of PI controller parameters, so as to improve control performance, realize precise control, realize The effect of automatic adjustment

Active Publication Date: 2019-07-02
JIAXING UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Another purpose of the present invention is to solve the problem that the parameters of the PI controller are difficult to adjust according to the parameters of the controlled object when the closed-loop control of the torque of the three-phase asynchronous motor adopts a PI controller, and propose a three-phase asynchronous motor torque PI controller. Control Method

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  • High precision torque control method for three-phase asynchronous motor
  • High precision torque control method for three-phase asynchronous motor
  • High precision torque control method for three-phase asynchronous motor

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Embodiment Construction

[0039]The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0040] It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

[0041] The invention provides a high-precision torque control method for a three-phase asynchronous motor, such as figure 1 As shown, the system adopted in the torque control method includes: a controller 110, a first power drive unit 120, a three-phase asynchronous motor 130, a torque sensor 140, a stator voltage control unit 600, a second power drive unit 700, a temperature measuring Device 900 and recording instrument 500.

[0042] Wherein said controller 110 is made up of comparator 111, proportioner 112, integrator 113 and adder 114, and the first input terminal of described...

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Abstract

The invention discloses a high precision torque adjusting method of a three-phase asynchronous motor, and belongs to the field of three-phase asynchronous motor control. A system adopted in the control method comprises a controller, a first power driving unit, the three-phase asynchronous motor, a torque sensor, a stator voltage control unit, a second power driving unit, a temperature measuring device and a recording instrument, wherein the controller comprises a comparator, a proportioner, an integrator and a summator; the control method comprises the following steps: firstly identifying the equivalent moment inertia parameter Ai of the three-phase asynchronous motor, and then adjusting the proportional control parameter Kp and the integral control parameter Ki of the controller. During debugging, as the parameters of the PI controller are adjusted according to the parameters of the three-phase asynchronous motor, the parameters of the PI controller can be adjusted, the blindness of parameter adjustment of the PI controller is contained, time and vigor are saved, and a good torque control effect can be obtained.

Description

technical field [0001] The invention belongs to the field of three-phase asynchronous motor control, and relates to a three-phase asynchronous motor torque control system. More specifically, the invention relates to a high-precision torque control method for a three-phase asynchronous motor. Background technique [0002] The torque control of the three-phase asynchronous motor must adopt closed-loop control to obtain excellent torque control performance. The torque closed-loop control system of the three-phase asynchronous motor includes the controller and the controlled object. Targeted adjustment of PI (proportional-integral) controller parameters is a problem to be solved in the prior art. At present, in the known prior art, the proportional control parameters and integral control parameters of the PI controller are directly adjusted by trial and error method or empirical method, instead of adjusting according to the parameters of the controlled object, and the adjustment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/20
Inventor 张今朝朱海燕
Owner JIAXING UNIV
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