Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A brushless DC motor high-speed delay turn-off angle setting method

A brushed DC motor, turn-off angle technology, applied in motor control, electrical components, electronic commutators, etc., can solve the problems that the technology has not been reported yet, and the high-speed delay turn-off angle setting technology is rarely researched, etc. Effects of high-speed commutation torque ripple

Inactive Publication Date: 2018-12-07
张菊香
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Up to now, there are very few researches on the high-speed delay turn-off angle setting technology in the commutation process of brushless DC motors, and the application technology of the present invention has not yet been reported.

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
  • A brushless DC motor high-speed delay turn-off angle setting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0016] Such as figure 1 As shown, the present invention provides a method for setting a high-speed delayed turn-off angle of a brushless DC motor, comprising the following steps:

[0017] Step 1. After the brushless DC motor enters the high-speed steady-state working state, determine the turn-off phase of the brushless DC motor in the commutation process, and set the initial value of the delayed turn-off angle of the turn-off phase to 0;

[0018] Step 2. In each subsequent commutation cycle, the delay turn-off angle of the turn-off phase is incremented by 1 electrical angle;

[0019] Step 3. Record the non-commutation phase current Ia before commutation in each commutation cycle;

[0020] Step 4. Record the non-commutation phase current Ib during the commutation process in each commutation cycle;

[0021] Step 5, s...

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 brushless DC motor high-speed delay turn-off angle setting method is as follows: after the brushless DC motor enters a high-speed steady working state, the initial value of the delay turn-off angle of a turn-off phase is set to be 0; in each subsequent commutation period, the turn-off phase delay turn-off angle is increased by one electrical angle; a non-commutated phasecurrent Ia before each commutation period is recorded; the non-commutated phase current Ib in each commutation period is also recorded; the Ib is subtracted from the Ia to obtain a non-commutated phase current deviation delta I of the brushless DC motor; and the corresponding off-phase delay turn-off angle when the absolute value of delta I / Ia is minimized is set as a brushless DC motor high-speeddelay turn-off angle.

Description

technical field [0001] The invention belongs to the field of brushless direct current motor control, relates to a brushless direct current motor, in particular to a method for setting a high-speed delayed turn-off angle of a brushless direct current motor. 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 fluctuations generated during commutation of brushless DC motors can cause motor vibration and noise, which limits the application range of this type of motor. Taking the brushless DC motor with 120° conduction and three-phase six-state control as an example, when the high-speed brushless DC motor commutates, the current change rate of the off-phase is too large. During the phase-off process,...

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): H02P6/15H02P6/10
CPCH02P6/10H02P2207/05H02P6/15
Inventor 张菊香
Owner 张菊香
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com