Control circuit of metal halide headlamp of digitized locomotive
A technology for controlling circuits and headlights, applied in electric light sources, lighting devices, electrical components, etc., can solve problems such as troublesome and complex control circuits, unstable lamp arcs, damage to lamp life, etc., to promote technological innovation and reduce energy. consumption, improve the effect of transport energy
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[0019] Example one
[0020] This embodiment is a digital locomotive metal halide headlamp control circuit, and its circuit block diagram is as follows figure 1 As shown, it includes an input circuit, APFC circuit, DC / DC conversion circuit, DC / AC conversion circuit, CPU control circuit and HID lamp. The input circuit rectifies and filters the input voltage and outputs it to the APFC circuit after electromagnetic wave suppression. The APFC circuit performs power After factor correction, the DC voltage is output to the DC / DC conversion circuit. The DC / DC conversion circuit performs power processing and outputs the DC voltage to the DC / AC conversion circuit. At the same time, the DC / DC conversion circuit outputs current sampling and voltage sampling to the CPU control circuit. The DC / AC conversion circuit converts the DC voltage into an AC voltage, and at the same time receives the control signal from the CPU control circuit and outputs the AC voltage to the HID lamp. Between the DC / D...
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