公开(公告)号：US06310405B1

公开(公告)日：2001-10-30

申请号：US09501604

申请日：2000-02-10

申请人： Yong-woon Han ,  Seong-deog Jang ,  Kwang-seok Kang ,  Han-jun Sung

发明人： Yong-woon Han ,  Seong-deog Jang ,  Kwang-seok Kang ,  Han-jun Sung

IPC分类号： H02P1106

CPC分类号： H01R39/54 ,  H02M7/60

摘要： A non-directional frequency generator spark prevention apparatus including a plurality of electric connections connected with a direct current power source, i.e., brushes, and a commutator for converting direct current waveform inputted through the brushes into alternating current waveform by rotational movement thereof, and for outputting the alternating current waveform. A voltage pulse controlling part is connected between the brushes of the non-directional frequency generator, while having a resistor and a transistor which are connected in series with each other, and the transistor is operated synchronously with the rotation of the commutator of the non-directional frequency generator. By controlling the electric current to flow through the transistor during the brush-off period, a spark production during the brush-off period can be prevented. Further, by controlling the transistor to be turned off during a predetermined period between a predetermined time of the brush-off period to a predetermined time of the brush-on period, the electric current does not flow through the transistor at the beginning of the brush-on period, and accordingly, the spark production at the beginning of the brush-on period is prevented. A corresponding pulse generating part includes a photo-interrupter and a photo sensor, for generating a predetermined pulse waveform corresponding to the rotation of the commutator. Based on the pulse waveform, the transistor is operated, and accordingly, the transistor precisely synchronizes with the rotation of the commutator of the non-directional frequency generator.

摘要翻译： 一种无方向性频率发生器防火装置，包括与直流电源（即电刷）连接的多个电连接器，以及用于通过电动机将通过电刷输入的直流电波转换成交流波形的换向器，并且为了 输出交流波形。 电压脉冲控制部分连接在非定向频率发生器的电刷之间，同时具有彼此串联连接的电阻器和晶体管，并且晶体管与非定向频率发生器的换向器的旋转同步地操作， 方向频率发生器。 通过在刷洗期间控制电流流过晶体管，可以防止在刷洗期间产生火花。 此外，通过在刷毛期间的预定时间到刷新期间的预定时间之间的预定时间段期间控制晶体管截止，在电刷开始时电流不流过晶体管 因此，防止刷毛期间开始时的火花生成。 对应的脉冲发生部分包括光断续器和光传感器，用于产生对应于换向器旋转的预定脉冲波形。 基于脉冲波形，晶体管被操作，因此，晶体管与非定向频率发生器的换向器的旋转精确地同步。

公开(公告)号：US06399931B1

公开(公告)日：2002-06-04

申请号：US09778732

申请日：2001-02-08

申请人： Kwang-seok Kang ,  Seong-deog Jang

发明人： Kwang-seok Kang ,  Seong-deog Jang

IPC分类号： H05B668

CPC分类号： H05B6/66

摘要： A microwave oven includes a main casing with a cooking chamber, a door for opening and closing the cooking chamber, and a magnetron in the main casing, for heating food within the cooking chamber. The microwave oven further includes a power supply part, a first door switch closed while the door is closed to supply electric power from the power supply part into the magnetron, a monitor switch connected in series to the first door switch, being operated in reverse relative to the opening and closing of the first door switch, and a control part determining that the first door switch is in trouble where the first door switch and the monitor switch are not operated in reverse to each other, and preventing the electric power from being supplied into the magnetron when the door is opened while the first door switch and the monitor switch are both closed. With this configuration, the number of necessary switches are decreased and the circuits' structure is simplified, and thereby, the cost of production can be lowered and the stability of circuits can be improved.

摘要翻译： 微波炉包括具有烹饪室的主壳体，用于打开和关闭烹饪室的门，以及在主壳体中的磁控管，用于加热烹饪室内的食物。 微波炉还包括电源部分，当门关闭时第一门开关关闭以将电力从电源部分提供给磁控管;监视器开关，串联连接到第一门开关，反向相对操作 涉及第一门开关的打开和关闭;以及控制部，其确定第一门开关处于第一门开关和监视开关彼此不相反操作的问题，并且防止供电 当门打开时，第一个门开关和监视器开关都关闭，进入磁控管。 通过这种结构，必要的开关的数量减少，并且电路的结构简化，从而可以降低生产成本，并且可以提高电路的稳定性。