Control system, feed-forward control method and parameter identification method of brushless doubly-fed motor

A technology of control system and doubly-fed motor, applied in control system, vector control system, motor-generator control and other directions, can solve the problem of not considering feedforward parameter identification and other problems
CN108322117BActive Publication Date: 2019-08-13HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2019-08-13

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Abstract

The invention discloses a brushless doubly-fed motor control system, a feed forward control method and a parameter identification method. The control system comprises a d-axis control structure for outputting a d-axis component of a voltage command value and a q-axis control structure for outputting a q-axis component of the voltage command value. The d-axis control structure comprises a first PIcontroller, a first proportional controller, a second proportional controller, a first differential controller, a first superimposer and a second superimposer. The first proportional controller, the second proportional controller and the first differential controller are used for generating a first d-axis intermediate component, a second d-axis intermediate component and a third d-axis intermediate component respectively. The first PI controller is used for outputting a d-axis component of a voltage initial reference value; and the second superimposer is used for carrying out superposition processing on the d-axis feed forward quantity of the voltage reference value and the d-axis component of the voltage initial reference value to output a voltage command value. The control system eliminates a coupling term between the current and voltage of a control winding, and realizes accurate closed-loop control.
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Description

technical field

[0001] The invention belongs to the technical field of motor control, and more specifically relates to a control system, a feedforward control method and a parameter identification method of a brushless doubly-fed motor. Background technique

[0002] With the increasingly serious energy problem, people have developed a series of economical and energy-saving independent power generation forms such as wind power generation and ship shaft power generation. Doubly-fed motors are widely used in independent power generation systems because the required frequency converter is only the slip times power capacity, which can feed (send) grid energy into (out of) the motor and realize variable speed and constant frequency power generation. Compared with the widely used brush doubly-fed motor, the brushless doubly-fed machine (BDFM) adopts a special structural design, which eliminates the brushes and slip rings, improves the reliability of the motor operation, and reduces...

Claims

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