Control method of brushless double-fed motor and application thereof

A doubly-fed motor and control method technology, applied in the direction of motor generator control, electronic commutation motor control, single motor speed/torque control, etc., can solve the problem of large amount of calculation, error, inability to accurately control torque and flux linkage and other problems, to achieve the effects of simple observer model, simple control algorithm, and small dependence on

Inactive Publication Date: 2011-01-19
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the first method, the direct solution of the electromagnetic torque equation is complicated to implement, the amount of calculation is large, and the dependence on the motor parameters is large; the electromagnetic torque estimation method and the method based on the synchronization angle will introduce errors

Method used

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  • Control method of brushless double-fed motor and application thereof
  • Control method of brushless double-fed motor and application thereof
  • Control method of brushless double-fed motor and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] One of the typical implementation schemes of the brushless doubly-fed motor control method adopts the rotor field orientation of the motor on the control side, and its system block diagram is shown in image 3 , control method flow see Figure 4 , see the description below for details:

[0053] 101: Send the measured stator current of the motor on the power side and the stator current of the motor on the control side to the rotor flux observer and the torque observer to obtain the amplitude, slip angle and motor torque of the rotor flux of the control side motor.

[0054] This step is specifically: In order to realize the direct feedback control of the rotor field orientation of the brushless doubly-fed motor, it is necessary to obtain the direction of the rotor flux linkage of the control side motor to achieve field orientation, and at the same time, it is necessary to obtain the amplitude of the rotor flux linkage of the control side motor and the Torque, take them a...

Embodiment 2

[0080] The second typical implementation scheme of the brushless doubly-fed motor control method adopts the stator field orientation of the motor on the control side, and its system block diagram is shown in Figure 5 , control method flow see Image 6 , see the description below for details:

[0081] 201: Send the measured stator current of the motor on the power side and the stator current of the motor on the control side to the stator flux observer and the torque observer to obtain the amplitude, slip angle and motor torque of the stator flux of the control side motor.

[0082] This step is specifically: In order to realize the direct feedback control of the stator field orientation of the brushless doubly-fed motor, it is necessary to obtain the direction of the stator flux linkage of the control side motor to achieve field orientation, and at the same time, it is necessary to obtain the amplitude of the stator flux linkage of the control side motor and the Torque, take t...

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Abstract

The invention discloses a control method of a brushless double-fed motor and an application thereof, relating to the field of motor control. In the control method, the observed control-side motor flux linkage and motor torque are used as feedback quantities to be compared with a given value by using the influence of a power-side motor on a control-side motor as the disturbance according to the basic principle of feedback control, a regulator regulates errors to obtain a control quantity under a synchronous coordinate system, and the control quantity is subject to rotation transformation and is converted to a control quantity under a static coordinate system so as to realize the control on the control-side motor flux linkage and motor torque. Flux linkage observer and torque observer models have less dependence on motor parameters; the control algorithm is simple and avoids the difficulty in solving the complicated nonlinear equation; and the invention can realize the effective control on the control-side motor flux linkage and motor torque in the dynamic/static process, thereby being especially applicable to variable-frequency speed-regulating, variable-speed constant-frequency constant-voltage and variable-frequency variable-voltage control systems of the brushless double-fed motor.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a control method of a brushless doubly-fed motor and its application, and is suitable for the application occasions of the brushless doubly-fed motor's frequency conversion speed regulation, variable speed constant frequency constant voltage, and variable frequency variable voltage control system. Background technique [0002] In recent years, due to the development and utilization of new energy, especially in the utilization of wind energy, the research on the application and control method of doubly-fed motors has received great attention. Doubly-fed motors mainly include two types: brushed doubly-fed motors and brushless doubly-fed motors. At present, the wire-wound brush double-fed motor is widely used, which feeds power on both sides of the stator and rotor. Generally, the stator side is connected to the power frequency mains, and the rotor side is connected to the inverter thro...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/13H02P6/08
Inventor 夏超英王乐英
Owner TIANJIN UNIV
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