| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power processing apparatus capable of effectively consuming electric power and suppressing generation of noise. <P>SOLUTION: The power processing apparatus includes a control circuit 3 which controls an inverter circuit 2 for supplying an alternating current to an electronic resistor 1 formed by connecting a coil L for induction heating with a capacitor C for resonance in series. The inverter circuit 2 is formed by connecting two bridge circuits in parallel between DC buses. The bridge circuits 2a, 2b are composed of two switching elements S1, S2 and S3, S4, respectively, and the two switching elements are connected with each other in series. To change the power consumption of the electronic resistor 1 according to the magnitude of input power of the inverter circuit 2, the control circuit 3 on-off controls respective switching elements S1-S4 of both the bridge circuits 2a, 2b or on-off controls the respective switching elements S1, S2 of the one bridge circuit 2a and implements control with the one switching element S4 of the other bridge circuit 2b fixed in an on state and the other switching element S3 fixed in an off state. <P>COPYRIGHT: (C)2012,JPO&INPIT |
