| 摘要 |
PURPOSE:To reduce the capacity of an element, and to simplify the structure of a circuit by connecting a diode in parallel with a switching element, and recycling the reactive current of the switching element to a capacitor having a small capacity. CONSTITUTION:When a device is started, a capacitor 6 is charged in order of a diode 4, the capacitor 6 and an inductor 7, and a primary coil of a transformer 8 and a capacitor 12 are resonated by the ON/OFF operation of a switching element 10 to supply the power to a load 9. During the OFF period of the switching element 10, reactive current is recycled to a capacitor 5 for charge through a diode 11 and the primary coil of the transformer 8, and the capacitor 6 charges the capacitor 5 in spite of a limitation of current by the inductor 7. At this stage, the diode 4 and the switching element 10 are connected in parallel with each other, and the capacitors 5, 6 alternately supply the power to the inverter unit with the ON/OFF operation of the diode 4. Since the charging current of the capacitor 6 is not flowed to the element 10, capacity of the element 10 can be reduced. |
