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Brushless motor stepless speed change controller based on FPGA (Field Programmable Gate Array) digitization control

A technology of stepless variable speed and brushless motors, which is applied in the control system, electronic commutator, electronic commutation motor control, etc., can solve the problem of no position sensor brushless DC motor control scheme and achieve high integration and intelligence, reduce external circuits, and improve system efficiency

Inactive Publication Date: 2011-06-08
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Some researchers at home and abroad have applied FPGA to the control of DC motors, but have not used FPGA to realize the control scheme of brushless DC motor without position sensor.

Method used

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  • Brushless motor stepless speed change controller based on FPGA (Field Programmable Gate Array) digitization control
  • Brushless motor stepless speed change controller based on FPGA (Field Programmable Gate Array) digitization control
  • Brushless motor stepless speed change controller based on FPGA (Field Programmable Gate Array) digitization control

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Experimental program
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Embodiment Construction

[0037] Such as figure 1 As shown, the control object selected in this embodiment is a 45W permanent magnet brushless DC motor BLDC5 with a rated voltage of 24V, a rated current of 2A, and a maximum speed of 1600r / min. The controller includes FPGA1, motor power drive circuit 2, counter electromotive force detection circuit 4, and two external potentiometers 6. The external potentiometer adopts 5V gear. When the motor is started, the adjustment of the external potentiometer is used to realize the vibration-free start of the motor by the method of frequency reduction and boosting, and the process of stopping is realized by the method of frequency increase and voltage reduction. The control part is mainly based on FPGA1, and MCU control unit 7, three-phase full-bridge PWM generator 8, high-speed AD detection module 9, PLL time generator 10, and LCD display module 11 are built in FPGA1, and PLL time generator 10 is the MCU control unit 7. The three-phase full-bridge PWM generator ...

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Abstract

The invention discloses a brushless motor stepless speed change controller based on FPGA digitization control, which solves the technical problem of providing a brushless motor stepless speed change controller based on FPGA digitization control to realize the functions of vibration-free start-stop, reversing, and continuous and stable stepless speed change of the brushless DC motor without the control of a position sensor. Therefore, the invention adopts the technical scheme: the brushless motor stepless speed change controller comprises an EPGA, a motor power driving circuit, a counter electromotive force detecting circuit and two external potentiometers. Compared with the prior art, the invention has the obvious advantage and effect of firstly realizing that a digital chip is used as the controller, and solving the problem of realizing vibration-free start-stop, stable speed control, and the like of the brushless motor in the condition without the position sensor.

Description

technical field [0001] The invention relates to a motor controller, in particular to a brushless motor continuously variable speed controller based on FPGA digital control. Background technique [0002] Brushless DC motor (BLDC-Brushless DC Motor) has the advantages of small size, no mechanical contacts, long life, and convenient installation. It belongs to the current research hotspot and frontier of motor applications. At present, the brushless DC motor control basically uses the Hall sensor as the rotor position feedback element. However, the existence of the Hall position sensor not only increases the volume and cost of the motor, but also becomes one of the fault sources of the motor to a large extent, reducing the reliability of the system. Therefore, the control scheme of brushless DC motor without position sensor has become one of the current research hotspots and frontiers. [0003] At present, there are many position sensorless control schemes for brushless DC mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/06H02P6/18H02P6/182
Inventor 李仁旺吴新丽徐兴饶楚楚刘海霞成军乐刘光伟赵东方
Owner ZHEJIANG SCI-TECH UNIV
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