Patent ID: 6075328
Filing Date: 2000-06-13
Classification: H02M,H02P

Abstract:
A converter control apparatus comprising:converter circuits having a rectifying circuit for rectifying ac power to a dc voltage, a smoothing circuit and a chopper circuit for incrementing and decrementing the dc voltage by means of switching operation of switching elements and an energy storage effect by inductance; a dc voltage detection circuit for detecting a dc voltage value of a load coupled to said converter circuit; and a dc voltage control means for controlling the switching operation of said chopper circuit such that said dc voltage value coincides with a dc command value on the basis of an output value from said dc voltage detection circuit and said dc voltage command value; wherein when the switching operation of said chopper circuit is started by said dc voltage control means, the dc voltage value is caused to increase gradually to coincide with a predetermined value, and when the switching operation of said chopper circuit is stopped, the dc voltage value is caused to decrease gradually to coincide with a predetermined value.