AN IMPROVED ELECTRONIC TRANSFORMER FOR LOW-POWER HALOGEN CYCLE LAMPS

Halogen cycle lamps are used for both outdoor and indoor lighting alth ough low-power halogen cycle lamps are used in indoor lighting, When l amp power is below 50 W these lamps cannot be connected to power Line directly because a low input voltage, between 6 and 24 V, is needed, T raditional supply equipments for low-power halogen lamps are 50/60-Hz transformers, but they are bulky and heavy, A. low-cost, reliable, hig h-frequency supply system (an electronic transformer) for low-power er halogen cycle lamps, based on a self-oscillating half-bridge inverter , is described in this paper, Compared with a 50-Hz transformer, weigh t and size have been minimized, Moreover, a high power factor, more th an 0.9, has been achieved, and the circuit is reliable and flexible.