Patent ID: 7710067
Filing Date: 2010-05-04
Classification: B60L,H02J,H02M,Y02T

Abstract:
1. A power supply system comprising: a load unit including a capacitor, an inverter and a motor; a power accumulating unit connected to the load unit including a first switch section configured and arranged to selectively achieve a first voltage output state in which an output voltage of the power accumulating unit is substantially equal to a first motor driving voltage and a second switch section configured and arranged to selectively achieve a second voltage output state in which the output voltage of the power accumulating unit is substantially equal to a second motor driving voltage that is higher than the first motor driving voltage; a current adjusting part disposed between the power accumulating unit and the load unit, and configured and arranged to suppress a variation in a current that flows between a terminal of the power accumulating unit and a terminal of the load unit; and a voltage switching control part configured to perform a single voltage switching control operation to switch between the first motor driving voltage and the second motor driving voltage while electric power is continuously transmitted between the power accumulating unit and the load unit during the single voltage switching control operation by alternately operating the first and second switch sections of the power accumulating unit to repeatedly switch between the first voltage output state and the second voltage output state before the single voltage switching control operation is completed.