Patent ID: 6246209
Filing Date: 2001-06-12
Classification: H02P

Abstract:
A control device for an AC motor, the device comprising:an alternating electric current power source for supplying an alternating current to the motor;a converter for converting the alternating current supplied from the power source into a direct electric current;a condenser for smoothing the direct current outputted from the converter;an inverter for inverting the direct current from the condenser into an alternating current, the inverter having a plurality of power switching devices;a pulse width modulation signal generator for supplying a control signal to switch the power switching devices;a controller for controlling a generation of the control signal of the pulse width modulation signal generator; anda reactor provided between the inverter and the motor, and having a bar shaped core, with at least two individual phase coils wound thereon, for minimizing voltage consumption during a starting or accelerating operation of the motor.