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Brushless direct current motor vector control system and construction method thereof

A technology of brush DC motor and vector control, which is applied in the direction of vector control system, control system, motor generator control, etc., and can solve problems such as potential safety hazards, system reliability reduction, and development constraints

Inactive Publication Date: 2018-10-30
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 direct current motor vector control system and construction method thereof
  • Brushless direct current motor vector control system and construction method thereof
  • Brushless direct current motor vector control system and construction method thereof

Examples

Experimental program
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Effect test

Embodiment 1

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

[0109] Such as figure 1 As shown, this embodiment 1 provides a brushless DC motor vector control system, including: a dual closed loop regulator, an SVPWM controller and an inverter; wherein the dual closed loop regulator includes a rotational speed adjustment outer loop and a current adjustment inner loop And the rotation speed regulator of the rotation speed adjustment outer loop is suitable for adopting a fuzzy neural network controller; a given rotation speed is adjusted by the double closed-loop regulator and then input to the SVPWM controller; and the SVPWM controller is suitable It generates a control pulse signal and is used as a control signal of the brushless DC motor after being inverted by the inverter.

[0110] Specifically, the brushless DC motor vector control system chooses the dual closed-loop intelligent control design scheme, which is to...

Embodiment 2

[0145] On the basis of embodiment 1, this embodiment 2 provides a construction method of a brushless DC motor vector control system, which includes the following steps:

[0146] Step S1, create a fuzzy neural network controller, determine the structure of the fuzzy neural network, and use historical data samples to train and learn the fuzzy neural network to obtain initial values ​​of network weights and thresholds;

[0147] Step S2, optimize the parameters of the fuzzy neural network controller, and use an 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, rotation speed and rotor position of the brushless DC motor as the feedback value of the vector control system of the brushless DC motor; and

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

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Abstract

The invention relates to a brushless direct current motor vector control system and a construction method thereof, and the brushless direct current motor vector control system comprises a dual closed-loop adjustor, a SVPWM controller and an inverter, wherein the dual closed-loop adjustor comprises a revolving speed adjusting external loop and a current adjusting inner loop, moreover, a revolving speed adjustor of the revolving speed adjusting external loop is suitable for being a fuzzy neural network controller; a preset revolving speed is input into the SVPWM controller after being adjusted through the dual closed-loop adjuster; and the SVPWM controller is suitable for generating a control pulse signal, and the control pulse signal is inverted through the inverter and then taken as a control signal of the brushless direct current motor. For the brushless direct current motor vector control system provided by the invention, a fuzzy neural network is introduced on the basis of the conventional control method, stability of the system is improved, and adaptive performance of the system is increased.

Description

Technical field [0001] The invention relates to a combined application combining a fuzzy neural network and a 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 daily life and production. How to achieve more reliable and effective control of valves has great research value. Although many control methods have been proposed, most of the motor-controlled valve systems have great shortcomings, such as poor anti-interference, insufficient adaptive ability or lack of adaptive ability, and easy failure. With the further development of society, the control requirements of various fields will further increase, and these shortcomings will be gradually enlarged and become factors hindering development. Due to the existence of these deficiencies, the reliability of the system will be reduced, and even potential saf...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/22H02H7/085
CPCH02P21/001H02H7/085H02P21/22
Inventor 李瑶王易钱李德军魏建宏李玉鹏
Owner CHANGZHOU LANLING AUTOMATION EQUIP
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