Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2005-04-05
2005-04-05
Ip, Paul (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S757000, C318S801000, C318S803000, C318S808000
Reexamination Certificate
active
06876171
ABSTRACT:
A driving apparatus of a three-phase induction motor includes: a three-phase power supply unit for supplying three-phase power; a rectifier for rectifying the three phase voltage supplied from the three phase power supply unit; a voltage reducing unit for reducing a DC voltage generated from the rectifier and outputting a stabilized DC voltage; and an inverter unit for varying the DC voltage outputted from the voltage reducing unit to a three-phase AC voltage and driving a three-phase induction motor. A power-factor degradation generated during supplying a DC voltage to the inverter to drive the three-phase induction motor is prevented, a harmonic wave is removed, and because a high-priced inverter component is not necessary, its relevant expense is reduced.
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“A Switched Reluctance Motor Drive Operating at Unity Power Factor”, Sep. 1996.
Greenblum & Bernstein P.L.C.
Ip Paul
LG Electronics
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