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New energy-storage dc-dc converter with multiple outputs

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2 Author(s)
Matsuo, H. ; Department of Electronics, Nagasaki University, Nagasaki, Japan ; Harada, K.

New energy-storage dc-dc power converter is presented which provides multiple regulated and isolated dc output voltages. The conventional converter circuits have some defects. In the step-up-down type circuit, the operation is easy to be unstable when the feedback loop gain and/or the total output power grows larger. Meanwhile, although the operation of the step-down type circuit is stable, the extraordinary phenomena arise when the magnetomotive force of the energy-storage reactor is discontinuous for the light-load. These phenomena may be eliminated by the use of a dummy load or the reactor of sufficiently large inductance, but it makes the efficiency lower or the size and weight of the reactor larger. In the converter circuit presented here, the operation is stable and the extraordinary phenomena are eliminated by using the magnetic coupling among the multiple windings of the reactor. Hence, the dummy load can be removed and the inductance of the reactor can be made smaller.

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Magnetics, IEEE Transactions on  (Volume:14 ,  Issue: 5 )