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1. 发明授权

US06169682A Non-directional frequency generator spark removal circuit 失效
标题翻译：无方向频率发生器火花去除电路
公开(公告)号：US06169682A
公开(公告)日：2001-01-02
申请号：US09501605
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： H02M760
CPC分类号： H01R39/46 , H02M7/60
摘要： A non-directional frequency generator for converting direct current into alternating current includes a direct current input end connected with a direct current power source and an alternating current output end connected with an alternating current output section to prevent a spark of the non-directional frequency generator. The non-directional frequency generator converts direct current inputted from the direct current power source into alternating current, and outputs the alternating current to the alternating current output section. First and second switching sections are connected with the direct current input end and the alternating current output end in order to control the conducting status of the direct current input end and the alternating current output end of the non-directional frequency generator, respectively. A third switching section is connected in parallel with the first switching section, and is intermittently switched on when the second switching section is switched on and the first switching section is switched off. The first and second switching sections are relays, while the third switching section is an integrated gate bipolar transistor. When direct current is applied, a microcomputer switches on the non-directional frequency generator and the second switching section, and intermittently applies the direct current to the non-directional frequency generator through switching means until the first switching section is switched on. Accordingly, difference between impedances of input and output sides of the non-directional frequency generator is decreased, and the spark is prevented. Further, since direct current is intermittently applied during a brush-on period in which a conductive part and a brush of the non-directional frequency generator are in contact, the spark which is caused at the beginnings of the brush-on/off periods, is also prevented.
摘要翻译：用于将直流电转换为交流电的非定向频率发生器包括与直流电源连接的直流输入端和与交流输出部分相连的交流输出端，以防止非方向频率发生器的火花。无方向频率发生器将从直流电源输入的直流电转换成交流电流，并将交流电输出到交流输出部。第一和第二开关部分与直流输入端和交流输出端连接，以分别控制非方向频率发生器的直流输入端和交流输出端的导通状态。第三开关部分与第一开关部并联连接，并且当第二开关部分接通并且第一开关部分断开时间歇地接通。第一和第二开关部分是继电器，而第三开关部分是集成栅极双极晶体管。当施加直流电时，微型计算机接通无方向频率发生器和第二开关部分，并且通过开关装置间歇地将直流施加到非方向性频率发生器直到第一开关部分接通。因此，非方向性频率发生器的输入侧和输出侧的阻抗之间的差异减小，并且防止了火花。此外，由于在非定向频率发生器的导电部分和电刷接触的刷毛期间间歇地施加直流电，所以在刷毛/断开时段开始时引起的火花，也被阻止。

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