DC-DC CONVERTER FOR ELECTRIC AUTOMOBILE

摘要

Provided is a cost-reduced DC-DC converter for an electric automobile. This DC-DC converter (20) is interposed between an accumulation device (10) and a drive motor of the electric automobile for raising the electric power of the accumulation device (10) at the power driving time of the drive motor by using a reactor (L1), a boosting switching element (Q2) and a boosting diode (D1), and for lowering a regenerative electric power at the regenerating time of the drive motor by using the reactor (L1), a step-down switching element (Q1) and a step-down diode (D2). The boosting switching element (Q2) has a higher current allowance than that of the step-down switching element (Q1).