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    • 8. 发明公开
    • METAL HALOGENATION LAMP ELECTRON DRIVER
    • METALLHALOGENIERUNGSLAMPE-ELEKTRONENTREIBER
    • EP1976342A1
    • 2008-10-01
    • EP05824078.9
    • 2005-12-27
    • Huen, WaikeiPoon, Lock Kee RockyLi, Yun
    • Huen, WaikeiPoon, Lock Kee RockyLi, Yun
    • H05B41/02
    • H05B41/2886H05B41/2882H05B41/2925Y02B20/208
    • An electric driver for metal halide lamp, comprises: an input circuit, a power factor correction circuit, a DC-DC switch power, a control circuit and an output circuit. Advanced PWM current control and PWM voltage control are applied in the invention. For purpose of power saving and higher efficiency, high frequency PWM technique and push-pull output without transformer are utilized in circuit switching. The power factor of the circuit according to the invention can reach up to 99% after parameter adjustment and optimization. The circuit in the invention can also advantageously achieve: a wider range of input voltage (165-265kV), constant current and constant power, stable luminance free of external interference, advanced over-current protection and over-voltage protection circuit and break protection, and higher operational stability.
    • 一种用于金属卤化物灯的电驱动器,包括:输入电路,功率因数校正电路,DC-DC开关电源,控制电路和输出电路。 本发明采用先进的PWM电流控制和PWM电压控制。 为节省电能并提高效率,电路切换采用高频PWM技术和无变压器的推挽输出。 参数调整优化后,本发明电路的功率因数可达99%以上。 本发明的电路还可以有利地实现:更宽的输入电压(165-265kV),恒定电流和恒定功率的范围,稳定的无外部干扰的亮度,先进的过电流保护和过电压保护电路和断路保护, 更高的运行稳定性。