| Title |
Soft-Start Open Circuit Voltage and Constant Current Sequence Control of 2.5[㎾] HID Search Lamp for Ship |
| Authors |
Noh-Sik Park ; Soon-Jae Kwon ; Dong-Hee Lee |
| Keywords |
HID(High Intensity Discharge) Search Lamp ; Voltage And Current Sequence Control |
| Abstract |
HID(High Intensity Discharge) search lamp for shipment requires a high open circuit and output current compare than vehicle. This paper presents a soft-start open circuit voltage and constant current sequence control method for 2.5[㎾] HID search lamp. The proposed mehtod controls the open circuit voltage and discharge current of HID lamp according to ignition signal with a simple 8-bit micro-processor and PWM device. For the stable control of lamp, micro-processor checks the output voltage and current. And the checked signals are compared with ignition signal and changes the control mede for stable operation. An ignition signal and micro-processor change the control mode from open circuit voltage contorl to constant current control. The proposed control scheme is verified from experimental tests of 2.5[㎾] HID search lamp for shipment. |