专利名称：BATTERY TYPE INSULATION RESISTANCE TESTER
发明人：HAYASHI EIJI,EZURE TAKASHI
申请号：JP27369985
申请日：19851205
中国联通怎么查话费
公开号：JPH0513469B2奥运会的由来
电磁炉加热原理
公开日：
武汉市长江大桥
19930222
包菜怎么炒好吃专利内容由知识产权出版社提供
姑娘茶摘要：PURPOSE:To prolong the life of a power switch by intermitting the output of a battery power source which is supplied through the primary coil of a transformer by a transistor (TR). CONSTITUTION:A switch 70 is turned on to supply a source voltage from the battery 10 respective gates and a plus voltage is applied to a NOT gate 63 through a resistance element 73 to place respective parts in operation. Con quently, a rectangular wave oscillator 20 outputs a rectangular wave with 1/2 duty. This rectangular wave drives the TR 32 through an amplifier 31. Con quently, the output of the battery 10 is intermitted through the primary coil 34 of the transformer 33 and boosted by the transformer 33. The boosted voltage led out of the condary coil 35 is rectified 40 to a double voltage, which is applied to the insulation resistor 90 to be measured as a DC output high voltage E0 through measurement terminals E and L, so that a current flowing through the resistor 90 is converted 81 logarithmically and outputted on an indicator 80.
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A current flowing to a control circuit 60 compod of a C-MOS logic circuit is small, so even when this current is intermitted, no spark is generated at the switch 70, who life is prolonged.
申请人：YOKOGAWA ELECTRIC CORP
中学生字帖
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