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A three-phase asynchronous motor controller and a control method based on slip automatic optimization

A motor controller, three-phase asynchronous technology, applied in motor generator control, motor control, AC motor control, etc.

Active Publication Date: 2018-12-11
浙江金轴机电科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The controller and the control method solve the problem of how to improve the efficiency of the motor while improving the stability

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  • A three-phase asynchronous motor controller and a control method based on slip automatic optimization
  • A three-phase asynchronous motor controller and a control method based on slip automatic optimization
  • A three-phase asynchronous motor controller and a control method based on slip automatic optimization

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Embodiment Construction

[0039] The following are specific embodiments of the present invention, and further describe the technical solution of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0040] Such as Figure 1-2 As shown, this three-phase asynchronous motor controller based on slip automatic optimization includes

[0041] PID regulator 2: used to obtain the angular frequency command ω * and rotor rotation angular frequency ω r The difference err ω And generate the corresponding stator reference voltage u after adjustment s ;

[0042] Velocity Integrator: Used to rotate the angular frequency ω according to the stator voltage vector s After integration, the corresponding control angle θ is obtained;

[0043] Sin-cosine coordinate converter: connected to the output terminal of PID regulator 2 and speed integrator, used for reference voltage u according to the stator s and the stator control angle θ to gene...

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Abstract

The invention provides a three-phase asynchronous motor controller and a control method based on slip automatic optimization, belonging to the technical field of asynchronous motor control. The invention solves the problem of how to improve the efficiency and stability of the motor at the same time. The controller comprises a PID regulator 2, a speed integrator, a sine-cosine coordinate converter,an SVM modulator, a PWM inverter, an abc / Alpha Beta. Converter, an ASO observer and a PID regulator 1. The method comprises the following steps: (1) obtaining a stator inductance value Ls, a stator resistance value Rs, a rotor inductance value Lr, a rotor resistance Rr and a stator-rotor slip s of the motor, and sampling the current and voltage of the three-phase induction motor; (2) converting the sampled current value to a stator alpha and beta coordinate system; (3) According to the formula: A = us Beta is Alpha- Us Alpha isBeta - Omega s [Lsis 2 + Lr (us Alpha is Alpha + us Beta is Beta - Rsis 2) / (Rr / s)] such that A - 0, calculate Omega s; (4) Feedback the calculated stator voltage vector rotation angle frequency Omega s to the control circuit. The stator voltage vector rotationangle frequency Omega s is controlled by a PID regulator such that A - 0, and the motor is controlled to run stably according to the requirements so as to improve the robustness and stability of thesystem.

Description

technical field [0001] The invention belongs to the technical field of asynchronous motor control, and relates to a three-phase asynchronous motor controller and a control method based on slip automatic optimization. Background technique [0002] At present, in the vector control of three-phase asynchronous motors, three types of control strategies are usually adopted: one is rotor magnetic field positioning; the second is stator flux tracking; the third is slip frequency control. [0003] In the rotor magnetic field positioning control mode, the rotor angle is estimated by installing sensors on the rotor or according to the parameters of the motor's resistance and inductance, and then converting the stator current into the rotor coordinate system for decoupling, and obtaining the required voltage through PID control And converted to the stator side. This control method has a large amount of calculation, a complex control framework, and is greatly affected by motor paramete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/13H02P21/12H02P21/14H02P25/02H02P27/08
CPCH02P21/0003H02P21/12H02P21/13H02P21/14H02P25/02H02P27/08H02P2207/01
Inventor 廉晨龙
Owner 浙江金轴机电科技有限公司
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