Patent ID: 8159179
Filing Date: 2012-04-17
Classification: H02J,H02M,H02P

Abstract:
1. A battery charging device that is connected between a three-phase alternating current generator having U, V, and W phases and a battery, and is constructed so as to convert alternating current power output from the three-phase alternating current generator into direct current power and supply the direct current power to the battery, and that performs advance angle/delay angle control by either advancing or delaying an energization timing to switching elements of a rectifier portion having a bridge configuration relative to a phase of the alternating current output voltage from the three-phase alternating current generator, the device comprising: an alternating current output voltage detection circuit that: a U, V, W phase voltage generating circuit that: an advance angle/delay angle calculation circuit that determines an advance angle/delay angle amount of the energization timing to the switching elements based on a signal of a differential voltage between a voltage of the battery and a predetermined target voltage, and the synchronous signals of the each phase that are output by the U, V, W phase voltage generating circuit; and an advance angle/delay angle control circuit that performs the advance angle/delay angle control of the switching elements using the advance angle/delay angle amount determined by the advance angle/delay angle calculation circuit.