Driving apparatus and method of three phase induction motor
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United States of America Patent
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Apr 5, 2005
Grant Date -
Apr 22, 2004
app pub date -
Apr 16, 2003
filing date -
Oct 17, 2002
priority date (Note) -
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status (Latency Note)
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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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