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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

Active Publication Date: 2019-08-13
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0009] In view of the above-mentioned defects, the present invention provides a control system for brushless doubly-fed motors, aiming to solve the technical problem that the feed-forward parameter identification in the feed-forward link is not considered in the existing brushless doubly-fed motor control systems

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

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[0087] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0088] The present invention proposes a brushless doubly-fed motor control system and control method on the basis of fully combining the characteristics of the brushless doubly-fed motor and the self-adaption of the controller. The control system can realize the control system of the brushless doubly-fed independent operation vector control Accurate feed-forward compensation realizes the decoupl...

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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.

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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00
CPCH02P21/0003
Inventor 苏婧媛陈宇张德斌康勇
Owner HUAZHONG UNIV OF SCI & TECH
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