| 摘要 |
PROBLEM TO BE SOLVED: To achieve low cost and compactness compared to conventional devices in the case of constant frequency action which is effective for a multi- port induction heating cooker, or the like. SOLUTION: This inverter is composed of a coil 4 of which one end is connected to a DC power source 1, a first switching element 5 serially connected to the coil 4 to the DC power source 1, a first resonance capacitor 6 to for a resonance circuit with the coil 4, a serial connection of a second switching element 7 and a second resonance capacitor 8 to be connected to the coil 4 in parallel, and a control circuit 3 to control continuity of the first switching element 5 and the second switching element 7. In this case, the control circuit 3 alternately controls both switching elements 5, 7 for continuity at a constant frequency, and changes the continuity ratio of the switching elements 5, 7 to control input power. |
