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公开(公告)号：US5319174A
公开(公告)日：1994-06-07
申请号：US573407
申请日：1990-08-28
CPC分类号： H02M7/53803 , H05B6/065 , Y02B70/1441
摘要： An induction heating cooker has a rectifier (13) for producing pulsating DC current, an inverter (14) which receives the pulsating current given from the rectifier (13) and produces a high frequency output current and a load circuit (15) including an output coil (21) and a resonance capacitor (22) connected in series to each other to receive high frequency output signal from the inverter, and the variation or adjustment of output electromagnetic power is made by changing duty ratio of the high frequency output current of the inverter by giving variable duty ratio setting signals to switching elements (Qa, Qb) in the inverter 14; the frequency of the high frequency output current of the inverter 14 is fixed, and therefore, unpleasant interference sound is not generated at parallel simultaneous operation.
摘要翻译： 感应加热烹调器具有用于产生脉动直流电流的整流器（13），接收从整流器（13）给出的脉动电流并产生高频输出电流的逆变器（14）和负载电路（15），其包括输出 线圈（21）和谐振电容器（22），它们彼此串联连接以接收来自逆变器的高频输出信号，并且通过改变输出电磁功率的高频输出电流的占空比来进行输出电磁功率的变化或调整 通过向逆变器14中的开关元件（Qa，Qb）赋予可变占空比设定信号; 逆变器14的高频输出电流的频率是固定的，因此在并行同时操作时不产生令人不快的干扰声。
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公开(公告)号：US5571438A
公开(公告)日：1996-11-05
申请号：US402372
申请日：1995-03-13
申请人： Kiyoshi Izaki , Hideki Omori , Kenji Hattori , Hirofumi Noma
发明人： Kiyoshi Izaki , Hideki Omori , Kenji Hattori , Hirofumi Noma
摘要： In a switching device of an induction heating cooker, an oppositely poled diode for conducting a reverse current is coupled across the collector-emitter portion of a switching element provided in the first switching device, and turn-ON operation of the switching devices does not OCCUR in normal operation of the DUTY FACTOR T.sub.2 /T.sub.1 .apprxeq.0.5.
摘要翻译： 在感应加热烹调器的开关装置中，用于导通反向电流的相反极性的二极管耦合在设置在第一开关装置中的开关元件的集电极 - 发射极部分之间，并且开关装置的导通操作不是OCCUR 在DUTY FACTOR T2 / T1 APPROX 0.5的正常运行中。
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