Motor phase loss detection and protection method, motor phase loss protection system

A phase loss detection and phase loss protection technology, which is applied to emergency protection circuit devices, electrical components, etc., can solve the problems of inability to detect the lack of phase A of the motor, low detection accuracy, etc. Accuracy, the effect of preventing the motor from running without phase

Active Publication Date: 2017-09-01
BYD CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to this detection method, if there is indeed a phase loss in the motor, and the rotor position of the motor is in sector 1 or 6 at this time, and the output duty cycle of phase A meets the range of no phase loss, then the phase loss of the motor phase A cannot be detected. Therefore, there is a certain blind area of ​​judgment
[0004] The disadvantage of the existing technology is that there is a certain blind spot in the detection, and the detection accuracy is not high

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
  • Motor phase loss detection and protection method, motor phase loss protection system
  • Motor phase loss detection and protection method, motor phase loss protection system
  • Motor phase loss detection and protection method, motor phase loss protection system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0029] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicat...

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 present invention proposes a motor phase loss detection method, comprising the following steps: obtaining the current state of the motor; if the motor is in a running state, sampling the three-phase current of the motor, and according to the sampled three-phase current judging whether the motor is out of phase; and if the motor is in a non-operating state, sampling the three-phase current and three-phase voltage of the motor, and judging the three-phase current and three-phase voltage according to the sampling Whether the motor is out of phase. The method can avoid the blind area of ​​phase lack judgment, and greatly improves the detection accuracy. The invention also provides a motor phase loss protection method and a motor phase loss detection system.

Description

technical field [0001] The invention relates to the technical field of electric motors, in particular to a motor phase loss detection method, a motor phase loss protection method and a protection system. Background technique [0002] For the phase loss detection of the motor, it is relatively simple to detect whether the motor has a phase loss during the operation of the motor. It can be judged directly according to whether the integral value of the sampling current of one phase is 0 within a period of time. That is to say, if the current integral value of one phase is 0 and the other two phases are not 0, then it can be determined that the phase is missing. It is more difficult to judge whether the motor is out of phase when the motor does not turn, that is, the motor is not started or the rotating speed of the motor is very low. [0003] At present, when the motor is not rotating, the existing motor phase loss detection method is based on the corresponding relationship be...

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 Patents(China)
IPC IPC(8): H02H7/09
Inventor 杨桃桃陈焕龙
Owner BYD CO LTD
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