Drive circuit for a permanent magnet motor

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United States of America Patent

PATENT NO 10211762
APP PUB NO 20160043666A1
SERIAL NO

14822292

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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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.

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Patent Owner(s)

  • JOHNSON ELECTRIC INTERNATIONAL AG

International Classification(s)

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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