| 摘要 |
A novel DC/DC converter is provided which performs a power equalizing control such that the power supplied to the output side is equal to the supplied power of a fuel cell on the input side, thereby making the cell charge current constant. Moreover, the number of the components is reduced and a stabilized charging is achieved. A DC/DC converter, which uses an input source (Vfc) such as a fuel cell exhibiting a relatively large output impedance during a power supply, has, on its output side, a secondary battery (B) and an arbitrary load (Ro) which is wound about a single winding and constituted by such a magnetic coupling that the voltage value of the arbitrary load is decided by the ratio of the numbers of turns. A second converter (30) is connected between the output of the secondary battery and the load. A current control circuit (10), which is connected to the secondary battery, increases a charging current, which is to flow into the secondary battery, when the current of the load decreases due to an effect of the magnetic coupling. Conversely, the current control circuit reduces a charging current, which is to flow into the secondary battery, when the current of the load increases. Thus, the current control circuit controls the output voltage of the secondary battery such that it is maintained at a drooping voltage that has been set. ® KIPO & WIPO 2007
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