Title:
RESISTANCE-ENCOUNTERING STOP CONTROL METHOD FOR SINGLE-PHASE ASYNCHRONOUS ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2022/217699
Kind Code:
A1
Abstract:
Disclosed in the present invention is a resistance-encountering stop control method for a single-phase asynchronous electric motor. The single-phase asynchronous electric motor comprises a controller and an electric motor, wherein the electric motor comprises two control ends, which are respectively used for controlling forward rotation and reverse rotation; the controller comprises an MCU, and a first relay and a second relay, which are controlled by the MCU; the first relay and the second relay are respectively connected to one of the control ends of the electric motor; and one I/O port of the MCU is connected to one control end of the electric motor and the connection position is a first detection point, and the other I/O port of the MCU is connected to the other control end of the electric motor and the connection position is a second detection point. The resistance-encountering stop control method comprises the following steps: 1) a signal detection module respectively detecting voltages at a first detection point and a second detection point, performing rectification and filtering to obtain square wave voltage signals, and then outputting same to an MCU; and 2) the MCU obtaining, according to the two square wave voltage signals, a value Δt of the time difference between adjacent rising edges of the two signals, and when a change in Δt exceeds a certain range, determining that resistance is encountered.
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Inventors:
SUN YONG (CN)
WANG YUEYANG (CN)
BAO BOJUN (CN)
WU LONGWEN (CN)
WANG YUEYANG (CN)
BAO BOJUN (CN)
WU LONGWEN (CN)
Application Number:
PCT/CN2021/095401
Publication Date:
October 20, 2022
Filing Date:
May 24, 2021
Export Citation:
Assignee:
NINGBO DOOYA MECHANIC & ELECTRONIC TECH CO LTD (CN)
International Classes:
H02P3/18; H02P23/24; H02P25/04
Foreign References:
| CN109700173A | 2019-05-03 | |||
| CN108798350A | 2018-11-13 | |||
| CN111456614A | 2020-07-28 | |||
| CN110262332A | 2019-09-20 | |||
| CN110617003A | 2019-12-27 | |||
| CN107359840A | 2017-11-17 | |||
| JP2000087645A | 2000-03-28 | |||
| JPS6489984A | 1989-04-05 |
Other References:
PAN FENG, MA ZHAN-FEI: "Design and Implementation of Electric Curtain with Photosensitive Control Voice Control and Intelligent Anti-theft Function", YINSHAN ACADEMIC JOURNAL (NATURAL SCIENCE EDITION), vol. 30, no. 1, 20 January 2016 (2016-01-20), pages 38 - 40, XP055976965, ISSN: 1004-1869, DOI: 10.13388/j.cnki.ysajs.20151203.002
Attorney, Agent or Firm:
ZHEJIANG SUHAO LAW FIRM (CN)
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