Power supply system, electric vehicle including the same, and control method of power supply system

摘要

PPROBLEM TO BE SOLVED: To provide a power supply system capable of preventing an excessive current from flowing from a high-voltage side of a converter to an energy storage device at charging of the energy storage device, and to provide a motor-driven vehicle that includes the power supply system. PSOLUTION: Voltage VH of a main capacitor CM rises, by discharging processing of a filter capacitor CF2, following an operation check of second and third SMRs 10-2, 10-3 in the charge of the energy storage device by a charger 18. Accordingly, when a voltage difference between the voltage VH and voltage VB1 is larger than a prescribed value, a first converter 12-1 is driven to step down the voltage VH by a prescribed rate of change. Then, an upper arm of the first converter 12-1 is turned on, after the voltage difference between the voltage VH and the voltage VB1 falls to or below the prescribed value, and charging of a main energy storage device BA is executed. PCOPYRIGHT: (C)2011,JPO&INPIT