| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a half bridge type power converter capable of stable constant value control of an output voltage even in the case where a DC power supply voltage becomes large and an output current value becomes small to the extent of being limited by a pulse width limit of a rectified voltage. <P>SOLUTION: Series connection circuits of voltage dividing capacitors 2 and 3, and a first and second switching elements 4 and 5 are each connected in parallel to a DC power supply 1, and a primary winding 81 of a transformer 8 is connected between a node of the voltage dividing capacitors 2 and 3 and a node of the switching elements 4 and 5, and AC power is supplied to the primary winding 81 by turning on and off the switching elements 4 and 5 by turns. Provided are a rectifier circuit 9 converting an AC voltage transformed from a secondary side of a transformer 8 into a DC rectified voltage, and a filter circuit 10 smoothing the rectified voltage and supplying a prescribed output voltage to a prescribed load circuit 13, and an insertion reactor 21 is made to be inserted in series in the primary winding 81 of the transformer 8 by detecting that the output current to the load circuit 13 becomes a prescribed current value or less. <P>COPYRIGHT: (C)2012,JPO&INPIT |
