연세대 전기전자 기초실험 09년도 A+ 레포트 예비5
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연세대학교 전기전자 기초실험 09년도 A+ 레포트
목차
Chapter 5
Battery Tester and Charging Circuit Analysis
1. Economical battery test circuit
2. Auto battery charging circuit
3. PSPICE simulation
4. Reference
본문내용
1. Economical battery test circuit
① Explain the mechanism of Economical battery tester
Economical battery tester is used when we check the voltage of battery is full. Connect battery to and switch on, is discharged and then LED is on. But if the voltage is not enough then LED is off because the small voltage can`t operate the trasistor.
② Analyze the elements of Economical battery tester and its circuit system.
1) Explain the quality difference in accordance with capacitor.
Big accordance, time of charging can be long. So the battery tester can operate longter.
2) Applying the characteristics of transistor, explain the mechanism of circuit system.
Transistor have three terminals : Emitter, Collector and Base.
Current of collector and that of base flow into emitter. Typically when voltage between base and emitter() is same or greater than 0.7V, curret can be flow. So if is not big enough so if is under smaller than 0.7V then LED is off.
3) Explain the difference in accordance with resistance ratio.
and is voltage divider so they decide . So we have to make that when is the minimum voltage, is greater than 0.7V. And when is big, the currents of and go up so time of charging get loger.
참고 자료
①『전기전자기초실험』, 2006, 김재석 외 4명 공저.
②『ELECTRIC CURCUIT』6th edition , 2008, RICHARD C.DORF.
③ http://en.wikipedia.org (위키대백과사전)
