Patent ID: 6876171
Filing Date: 2005-04-05
Classification: H02M,H02P

Abstract:
1. A driving apparatus for a three-phase induction motor comprising: a three-phase power supply that supplies three-phase voltage; a rectifier that rectifies the three phase voltage supplied from the three phase power supply; a voltage reducer that reduces a DC voltage generated by the rectifier and outputs a stabilized DC voltage; and an inverter that varies the DC voltage output from the voltage reducer to a three-phase AC voltage and that drives the three-phase induction motor, said voltage reducer comprising: an integrated circuit that measures the DC voltage generated by the rectifier and that outputs a control signal to control the DC voltage output from the rectifier to the inverter; a gate driver that generates a drive signal to drive the inverter according to the control signal output from the integrated circuit; a DC stabilizer that reduces the DC voltage generated from the rectifier according to the drive signal of the gate driver, and that generates a stabilized DC voltage; and a DC link that links the DC voltage generated from the DC stabilizer to a load supplier that supplies the DC voltage applied to the DC link to the inverter.