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    • 24. 发明授权
    • Discharge lamp operating circuit
    • 放电灯工作电路
    • US5166579A
    • 1992-11-24
    • US554891
    • 1990-07-20
    • Kenji KawabataIkuya Nomoto
    • Kenji KawabataIkuya Nomoto
    • H05B41/24H05B41/295H05B41/392
    • H02M7/53871H05B41/295H02M2007/4815Y02B70/1441Y10S315/05Y10S315/07
    • The discharge lamp operating circuit comprises two series circuits, each including two switching devices, connected in parallel with the power supply, a series circuit, including a choke coil, a first capacitor, and a parallel circuit with a discharge lamp and a second capacitor, and connected between the middle points of the one and the other series circuit, reverse-direction rectifiers connected in parallel with the corresponding switching devices, said discharge lamp operating circuit turning on and off said discharge lamp by turning on and off the switching devices alternately. In this discharge lamp operating circuit, the timing of switching the switching devices is set from the closed condition to the open condition at a time when the current flowing through the switching devices is almost at zero level.
    • 放电灯操作电路包括两个串联电路,每个串联电路包括与电源并联连接的两个开关装置,包括扼流线圈,第一电容器和具有放电灯和第二电容器的并联电路的串联电路, 并且连接在一个和另一个串联电路的中点之间,与相应的开关装置并联连接的反向整流器,所述放电灯操作电路通过交替地打开和关闭所述放电灯来打开和关闭所述放电灯。 在该放电灯工作电路中,在开关器件流过的电流几乎为零电平时,将开关器件切换的定时从闭合状态设定为开启状态。