Drive circuit for a permanent magnet motor
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United States of America Patent
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Feb 19, 2019
Grant Date -
Feb 11, 2016
app pub date -
Aug 10, 2015
filing date -
Aug 8, 2014
priority date (Note) -
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Abstract
A drive circuit for an electric motor having a wound stator and a permanent magnet rotor, includes a controllable bidirectional AC switch connected in series with a stator winding between two terminals for connecting to an AC power supply. First and second position sensors detect the position of magnetic poles of the rotor. A voltage regulating circuit is connected between the two terminals and the controllable bidirectional AC switch and configured to supply power to the first sensor during the positive cycle and to the second position sensor during the negative cycle of the AC power supply such that the controllable bidirectional AC switch is switched between a conductive state and a non-conductive state in a preset manner, thus enabling the stator to rotate the rotor in only one predetermined direction during start-up.
First Claim
Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- JOHNSON ELECTRIC INTERNATIONAL AG
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Cui, Yan Yun | Shenzhen, CN | 36 | 269 |
Huang, Shu Juan | Shenzhen, CN | 32 | 60 |
Li, Yue | Hong Kong, CN | 797 | 4347 |
Liu, Bao Ting | Shenzhen, CN | 55 | 186 |
Sun, Chi Ping | Hong Kong, CN | 46 | 295 |
Wang, En Hui | Shenzhen, CN | 35 | 74 |
Xin, Fei | Shenzhen, CN | 43 | 282 |
Yang, Xiu Wen | Shenzhen, CN | 37 | 270 |
Yeung, Shing Hin | Hong Kong, CN | 39 | 274 |
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