Title:
THE THREE-PHASE AC SPEED ADJUSTABLE MOTOR
Document Type and Number:
WIPO Patent Application WO/2005/074104
Kind Code:
A1
Abstract:
Three-phase AC speed adjustable motor, relates speed adjusting techniques in the field of electrical engineering. Said three-phase AC speed adjustable motor is composed of an AC motor and a counter electromotive force generator which is connected with one end of the three stator windings of the AC motor, wherein the output voltage, output current and their phases of the counter electromotive force generator are variable. Instead of adjusting the speed of the motor by returning energy back to the network in prior art, it applies a counter electromotive force to the motor as to counteract a part of motor's energy and to control the magnitude of the DC voltage as to alter ideal no-load angular speed. By these techniques described above, the speed of motor is adjusted. Compared with the prior art, there isn't the part which gets energy from the motor and return to the network, therefore energy is saved and various undesirable influences to the network can be avoid. Its construction is more simple and more easily to makeso the cost is greatly reduced.
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Inventors:
WU JIALIN (CN)
Application Number:
PCT/CN2005/000057
Publication Date:
August 11, 2005
Filing Date:
January 14, 2005
Export Citation:
Assignee:
WU JIALIN (CN)
International Classes:
H02K7/00; H02K16/00; H02K53/00; H02P9/00; H02P23/00; (IPC1-7): H02K7/622
Foreign References:
| CN2143846Y | 1993-10-13 | |||
| CN2138365Y | 1993-07-14 | |||
| CN2162737Y | 1994-04-20 |
Attorney, Agent or Firm:
CHINA PATENT AGENT (H.K.) LTD. (Great Eagle Centre 23 Harbour Roa, Wanchai Hong Kong, CN)
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