发明名称 |
Current control for high-frequency heating apparatus |
摘要 |
The invention relates to a high frequency heating apparatus and provides a tracking method of a frequency modulation in order to prevent an extension of the harmonic current component of an oscillation threshold ebm which varies from moment to moment in accordance with a change in the temperature of a magnetron. A driving signal for driving a first semiconductor switching element ( 3 ) and a second semiconductor switching element ( 4 ) is transmitted to a driving control IC unit ( 14 ), and an input reference signal Ref is used to perform an input current fixed control. In this case, a variation amount of the input current of the input reference signal Ref is understood as an accumulation information POW and a constant is optimally configured in a resistor network in an ebm-tracking bias circuit ( 20 ).
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申请公布号 |
US7432484(B2) |
申请公布日期 |
2008.10.07 |
申请号 |
US20050577344 |
申请日期 |
2005.10.17 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
MORIYA HIDEAKI;SUENAGA HARUO;SAKAI SHINICHI;SHIROKAWA NOBUO;KINOSHITA MANABU |
分类号 |
H05B6/68 |
主分类号 |
H05B6/68 |
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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