Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2006-09-05
2006-09-05
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S767000, C318S727000, C318S606000, C318S684000, C332S117000
Reexamination Certificate
active
07102326
ABSTRACT:
A motor variator and a driving method thereof are provided for controlling the operating speed of a fan, which employ an alternate current chopper to change the working cycle and the rotary speed of a stepless motor. The motor variator includes a high-frequency alternate current chopper connected to an induction coil of an induction motor, an alternate current power supply connected to the high-frequency alternate current chopper and a controller connected to the high-frequency alternate current chopper for outputting a switch signal to the high-frequency alternate current chopper, such that the high-frequency alternate current chopper is controlled by the switch signal to perform a chopper action for the alternate current power supply and output a drive voltage, so as to change the rotary speed of the induction motor.
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Chang Chin-Hsiung
Chen Yu-Kai
Wang Wen-Yang
Wu Tsai-Fu
Wu Yung-Chun
Fego Precision Industrial Co., Ltd.
Leykin Rita
Troxell Law Office PLLC
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