| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce unpleasant sound in an intermittent oscillating operation. <P>SOLUTION: A switching device includes: a switching means for turning voltage on the primary side of a transformer on/off; and a signal transmission means for transmitting a signal according to a voltage to be output from the secondary side to the primary side of the transformer, and performs control so that a plurality of pulse intervals for turning the switching means on become different intervals when the intermittent oscillating operation is performed by lowering the voltage from the secondary side. <P>COPYRIGHT: (C)2012,JPO&INPIT |
