| 摘要 |
<P>PROBLEM TO BE SOLVED: To control power supplied by a positive half-wave and a negative half-wave in a control period such that the power has symmetry even in a case where a safety circuit having a hardware circuit operates. <P>SOLUTION: When supply of power from an AC power supply 401 to a heater 301 is limited by the safety circuit during a third half-wave (power supply waveform interval C-D) in the control period, a CPU 202a controls to supply the power of six half-waves from a third half-wave to a eighth half-wave (power supply waveform interval E-K), after the limitation of the supply of the power by the safety circuit is released. <P>COPYRIGHT: (C)2012,JPO&INPIT |
