Patent ID: 7755213
Filing Date: 2010-07-13
Classification: B60K,B60L,H02M,H02P,Y02T

Abstract:
1. A power supply device, comprising: first and second power storage devices; a first voltage converter provided between said first power storage device and a load circuit; a second voltage converter provided between said second power storage device and said load circuit; a first current path connected to an output of said first voltage converter; a second current path connected to an output of said second voltage converter and connected to said first current path at a junction; a third current path connected between said junction and said load circuit; a current sensor detecting a current flowing through said third current path; and a control device controlling said first and second voltage converters and monitoring a current value detected by said current sensor, said control device performing pulse width modulation control over said first and second voltage converters based on first and second carrier signals equal in frequency and different in phase, and said control device obtaining an individual value of currents flowing through said first and second voltage converters by sampling said detected current value with a time difference corresponding to said phase difference.