Device and method for shortening phase changing time of brushless direct current motor

A brushless DC motor and DC voltage source technology is applied in the field of devices for shortening the commutation time of a brushless DC motor, and can solve the problems affecting the detection of rotor position signals, so as to shorten the commutation time, weaken the commutation torque ripple, and reduce the commutation time. low cost effect

Active Publication Date: 2013-02-27
JIANGSU HENGTE GRP VALTTE ELECTRIC
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, during the operation of the brushless DC motor without a position sensor, the commutation torque ripple will also affect the detection of the rotor position signal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for shortening phase changing time of brushless direct current motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] figure 1 Shown is a block diagram of the driving part of the brushless DC motor control system including the method of the present invention, which is composed of a brushless DC motor 4, a three-phase full-bridge inverter 2, a DC voltage source 1, and a thyristor circuit 3. Each bridge arm of the three-phase full-bridge inverter is composed of a power tube and a freewheeling diode connected in parallel, which are respectively the power tube VT 1 , VT 3 , VT 5 , VT 2 , VT 4 , VT 6 and freewheeling diode VD 1 , VD 3 , VD 5 , VD 2 , VD 4 , VD 6 ; T 1 , T 3 , T 5 , T 2 , T 4 , T 6 Respectively anti-parallel thyristor; R a , L a Respectively, the resistance and inductance of phase A, R b , L b Respectively, the resistance and inductance of phase B, R c , L c Respectively, the resistance and inductance of phase C.

[0015] The technical solution adopted in the present invention is: on the wires connecting the three-phase bridge inverter and the brushles...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a device and a method for shortening the phase changing time of a brushless direct current motor. The device comprises a direct current voltage source, a triphase full bridge inverter and a thyristor circuit, wherein the direct current voltage source supplies power for the triphase full bridge inverter, and the triphase full bridge inverter controls the brushless direct current motor through the thyristor circuit. The method is as follows: each phase of the triphase full bridge inverter is correspondingly connected with each branch of the thyristor circuit; when the phase is changed, the disconnection and the connection of the triple bridge of the triphase full bridge inverter and the corresponding branch of the thyristor circuit are controlled simultaneously; the required disconnection phase of the brushless direct current motor is disconnected through the branch in the thyristor circuit, the phase required to be disconnected cannot form a continuous current channel, so that the current of the connected channel cannot be distributed; and the current of the phase required to be disconnected is reduced to zero, the current of the phase required to be connected is increased to be equal to the current of the connected phase, and accordingly, the time for changing the phases is shortened. Hardware is low in cost, the original operation control mode of the motor does not need to be changed, and the software is simple to realize.

Description

technical field [0001] The invention relates to a device and method for shortening the commutation time of a brushless direct current motor, which is suitable for the technical field of electric drive control. Background technique [0002] Brushless DC motors have many advantages such as simple structure, high power density, and simple control. In recent years, brushless DC motors have been increasingly widely used in industrial fields such as high-performance speed regulation systems and servo control systems. [0003] Commutation torque pulse is a prominent problem of brushless DC motors, which restricts its application in speed regulation systems requiring low ripple speed and high-precision position servo control systems. In addition, commutation torque ripple is also one of the causes of motor rotation noise. From the perspective of commutation duration, the shorter the commutation time, the larger the current change rate and the smaller the commutation torque ripple....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/14H02P6/15
Inventor 魏海峰张懿冯友兵王玉龙朱志宇
Owner JIANGSU HENGTE GRP VALTTE ELECTRIC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap