CAJ | 학술논문

在重复率脉冲固体激光器中,由于储能电容需要频繁的充放电,通常采用谐振充电电路以适应其负载的大范围变化.为此研制了开关频率为20kHz,充电电流为2.1 A,最高允电电压为1.86kV的半桥串联谐振充电电路.该电路工作于电流断续模式,开关管的开通和关断均为软开关.通过对周期电压、电流递推公式的分析,表明该工作模式中每个周期的平均充电电流均为恒定.应用递推公式计算稳态和暂态谐振屯容电压和电流,结果显示暂态最大工作电压是稳态最大电压的2倍.暂态最大电流为稳态最大峰值电流的1.5倍,为谐振电容和开关管的选取提供了依据.
재중복솔맥충고체격광기중,유우저능전용수요빈번적충방전,통상채용해진충전전로이괄응기부재적대범위변화.위차연제료개관빈솔위20kHz,충전전류위2.1 A,최고윤전전압위1.86kV적반교천련해진충전전로.해전로공작우전류단속모식,개관관적개통화관단균위연개관.통과대주기전압、전류체추공식적분석,표명해공작모식중매개주기적평균충전전류균위항정.응용체추공식계산은태화잠태해진둔용전압화전류,결과현시잠태최대공작전압시은태최대전압적2배.잠태최대전류위은태최대봉치전류적1.5배,위해진전용화개관관적선취제공료의거.
In repetitive pulse solid-state laser,energized capacitance needs charging and discharging frequently,which is usually realized by resonant circuit to suit wide load range.So a half-bridge series resonant charge circuit is developed which supplies charging current 2.1 A and maximum charging voltage 1.86 kV with 20 kHz switch frequency.The circuit runs in current interrupt mode,which guarantees transistor opening and closing at soft-switch.The periodic voltage and cur-rent recursion formula are analyzed,and show that average charging current is permanent in each period,transient maxi-mum voltage of resonant capacitor is twice of the steady state,and the transient maximum current is 1.5 times of steady state peak current.The result instructs the choice of resonant capacitor and switch transistors.