| 摘要 |
In odd-numbered current-supplying periods of a plurality of current-supplying periods constituting the gross current-supplying time, a control unit 42 allows continuous switching actions of only a first set of switching elements (24, 28) at an inverter frequency, with a second set of switching elements (26, 30) remaining OFF. In even-numbered current-supplying periods, the control unit 42 allows continuous switching actions of only the second set of switching elements (26, 30) at the inverter frequency, with the first set of switching elements (24, 28) remaining OFF. As a result of this, the secondary circuit of the power supply apparatus allows a secondary current i2, namely a fusing current I having a substantially trapezoidal current waveform to flow in the positive direction in the odd-numbered current-supplying periods, but to flow in the negative direction in the even-numbered current-supplying periods. <IMAGE> |
