Patent ID: 7692935
Filing Date: 2010-04-06
Classification: B60L,H02M,Y02T

Abstract:
1. A bi-directional DC-DC converter, comprising: a main high-voltage circuit having a first switching device; a main low-voltage circuit having a second switching device; a transformer whose ratio of the number of turns is N a step-down controller configured to control the first and second switching devices in the respective main high-voltage circuit and the main low-voltage circuit using a first switching frequency; and a step-up controller configured to control the first and second switching devices in the respective main high-voltage circuit and the main low-voltage circuit using a second switching frequency which is different from the first switching frequency; wherein the first switching frequency during step-down is set up low compared with the second switching frequency during step-up; and a step-down ratio during step-down is higher than the ratio of the number of the transformer turns (N