Abstract
This paper presents a constant power control circuit for a three-stage high-intensity discharge (HID) electronic ballast. The three-stage electronic ballast is composed of a boost pre-regulator to achieve a high power factor, a DC/DC buck converter to regulate lamp current with constant lamp power, and a full-bridge inverter to drive the HID lamp with a low-frequency ac squarewave current. The buck converter operating in current mode utilizes current sense level-shift technique to achieve constant power output. The proposed constant power control circuit is easily designed and implemented for the three-stage HID electronic ballast. Finally, a laboratory prototype of a 70 W HID electronic ballast is implemented. The measured results show that the proposed ballast can be applied for various HID lamps with low lamp power variation (less than 0.6%).
Original language | English |
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Pages (from-to) | 1573-1582 |
Number of pages | 10 |
Journal | IEEE Transactions on Power Electronics |
Volume | 22 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2007 Sept |
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering