| Title |
The Ballast for HID Lamps of Preventing the Overvoltage with a Long Distance Resonant Ignition |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2015.29.1.094 |
| Keywords |
HID(High Intensity Discharge) ; Long Distance Ignition ; Parasitic Capacitor ; Over Voltage ; Clamping Diode |
| Abstract |
The electronic ballast for HID lamps needs to ignite lamps even though the length from the ballast to lamp is far away. Therefore, it needs to do the research on a resonant ignition to turn on the HID lamps because the reduction of ignition voltage is not much depending on the distance. However, the parasitic capacitance is increased depending the length of the cable, and it affects the resonant frequency. The ignitor voltage can be increased drastically under the resonant ignition through frequency sweep, and it is the main reason of blowing up . Therefore, the clamping diode is proposed to suppress the voltage of the primary winding during resonant ignition. |