| 摘要 |
PROBLEM TO BE SOLVED: To continuously vary an oscillation frequency with ease by providing a quaternary winding connected to an external power supply or to an oscillation circuit in an inverter transformer of a Royer inverter circuit. SOLUTION: A quaternary winding 14 is provided in an inverter transformer 6, constituting a resonance-type Royer inverter circuit, and terminals on opposite ends of the quaternary winding 14 are connected to one terminal 17 of a direct- current power supply for control serially via capacitors 15, 16. The other terminal 20 of the direct-current power supply for control is connected to positions overpassing the quaternary winding 14 and the capacitors 15, 16 via impedance elements 18, 19, respectively. |
