Patent ID: 8120294
Filing Date: 2012-02-21
Classification: H02M,H02P

Abstract:
1. A power transducer which outputs alternating current (AC) power having a variable voltage and a variable frequency, the power transducer comprising: a converter for rectifying the AC voltage of an AC power supply to convert it to a direct current (DC) voltage; a DC intermediate circuit having a smoothing capacitor for smoothing the DC voltage of the converter; a detecting circuit for detecting the voltage of the DC intermediate circuit; a regenerative braking circuit disposed in the DC intermediate circuit; a drive circuit for driving the regenerative braking circuit when the detecting circuit detects a specified voltage; a timer for accumulating the operating time of the regenerative braking circuit to obtain the cumulative operating time; and an inverter for converting the DC voltage of the converter to an AC voltage, wherein a permissible duty factor and a resistance value of a regenerative braking resistor connected to the regenerative braking circuit of the DC intermediate circuit are individually set.