发明名称 |
INVERTER POWER SOURCE CONTROL CIRCUIT FOR HIGH-FREQUENCY HEATER |
摘要 |
<p>An oscillation control signal generated by an inverter power source control circuit (12) includes a reference voltage setting signal for approximating the current waveform of the AC output form the AC power source (1) to a sinusoidal wave by making both sides of the waveform generate current according to the fluctuation of the PWM control signal, and a waveform shaping signal consisting of a peak adjustment signal of a sinusoidal waveform for approximating the waveform peak portion of the current waveform to a sinusoidal wave by subtraction. Accordingly, even if the PWM control signal fluctuates, it is possible to automatically improve the power factor of the power source circuit to a value higher than a predetermined value by approximating the current waveform of the AC output from the AC power source to the sinusoidal wave, thereby improving the efficiency of the power source.</p> |
申请公布号 |
EP1630943(A1) |
申请公布日期 |
2006.03.01 |
申请号 |
EP20040745304 |
申请日期 |
2004.05.25 |
申请人 |
TABUCHI ELECTRIC CO.,LTD.;SHARP KABUSHIKI KAISHA |
发明人 |
MIYAZAKI, SHINOBU;NAKAISHI, MASAKI;MASUDA, SHINICHI |
分类号 |
H05B6/66;H02M7/48;(IPC1-7):H02M7/48 |
主分类号 |
H05B6/66 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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