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Brushless DC motor vector control system and construction method thereof

A brushed DC motor, vector control technology, applied in vector control systems, control systems, motor generator control and other directions, can solve problems such as safety hazards, system reliability reduction, and development constraints

Inactive Publication Date: 2019-06-07
CHANGZHOU LANLING AUTOMATION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of these deficiencies, the reliability of the system will be reduced, and even security risks will arise.
At the same time, the system maintenance cost caused by these deficiencies will also become an important factor restricting development

Method used

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  • Brushless DC motor vector control system and construction method thereof
  • Brushless DC motor vector control system and construction method thereof
  • Brushless DC motor vector control system and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] figure 1 It is a functional block diagram of the brushless DC motor vector control system of the present invention.

[0109] Such as figure 1 As shown, Embodiment 1 provides a brushless DC motor vector control system, including: a double closed-loop regulator, a SVPWM controller and an inverter; wherein the double closed-loop regulator includes a speed regulation outer loop and a current regulation inner loop loop, and the speed regulator of the outer loop of the speed adjustment is suitable for using a fuzzy neural network controller; a given speed is adjusted by the double closed-loop regulator and then input to the SVPWM controller; and the SVPWM controller is suitable for To generate a control pulse signal, which is used as a control signal of the brushless DC motor after inversion by the inverter.

[0110] Specifically, this brushless DC motor vector control system adopts the design scheme of double closed-loop intelligent control, which is to control the speed r...

Embodiment 2

[0145] On the basis of Embodiment 1, Embodiment 2 provides a method for constructing a brushless DC motor vector control system, including the following steps:

[0146] Step S1, creating a fuzzy neural network controller, determining the structure of the fuzzy neural network, using historical data samples to train and learn the fuzzy neural network, so as to obtain initial values ​​of network weights and thresholds;

[0147] Step S2, optimize the parameters of the fuzzy neural network controller, and use the online supervised learning algorithm to adjust and optimize, so as to improve the dynamic performance of the fuzzy neural network controller;

[0148] Step S3, detecting the three-phase current, rotational speed and rotor position of the brushless DC motor as the feedback quantity of the vector control system of the brushless DC motor; and

[0149] Step S4, designing the motor temperature protection, overcurrent protection, short circuit protection, overvoltage and undervo...

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Abstract

The invention relates to a brushless DC motor vector control system and a construction method thereof. The vector control system comprises a double-closed-loop regulator, an SVPWM controller and an inverter, wherein the double-closed-loop regulator comprises a rotating speed regulation outer ring and a current regulation inner ring, and a rotating speed regulator of the rotating speed regulation outer ring is suitable to adopt a fuzzy neural network controller. A given rotating speed is input into the SVPWM controller after being regulated by the double-closed-loop regulator. The SVPWM controller is suitable to generate a control pulse signal, and the control pulse signal is inverted by the inverter and then is used as a control signal of the brushless DC motor. According to the invention,the fuzzy neural network is introduced on the basis of a traditional control method, the stability of the system is improved, and the self-adaptive performance of the system is improved.

Description

technical field [0001] The invention relates to a combined application combining fuzzy neural network and brushless motor vector control, in particular to a brushless DC motor vector control system and a construction method thereof. Background technique [0002] With the development of society, more and more valve devices are used in life and production. How to realize more reliable and effective control of valves has great research value. Although many control methods have been proposed, most motor-controlled valve systems have great deficiencies, such as poor anti-interference, insufficient or no self-adaptive ability, and prone to failure. With the further development of society, the requirements for its control in various fields will be further enhanced, and these shortcomings will be gradually magnified and become factors hindering development. Due to the existence of these deficiencies, the reliability of the system will be reduced, and even hidden dangers will be gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/22H02P6/34H02H7/085
Inventor 李瑶王易钱李德军魏建宏李玉鹏
Owner CHANGZHOU LANLING AUTOMATION EQUIP
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