1. Optimization and Performance Evaluation of an AC-Chopper Ballast for HPS Lamps.
- Author
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Giezendanner, Florian, Biela, Jurgen, and Kolar, Johann W.
- Subjects
- *
BALLASTS (Electricity) , *ELECTRIC lamps , *ELECTROMAGNETIC compatibility , *TOPOLOGY , *ELECTRIC lighting , *ELECTRIC controllers - Abstract
Electronic ballasts for high-pressure sodium lamps based on an ac-chopper topology are proposed as a cheaper and less complex alternative to the industry-standard low-frequency square-wave ballasts. In this paper, the design process of the ac-chopper ballast is reviewed, and the design tradeoffs caused by the single-stage topology are discussed. The analytical and simulation results are verified with measurements of a 250-W prototype system, including a detailed list of the losses for the different circuit components and electromagnetic compatibility measurements. Due to the disadvantages of the single-stage topology, a comparison to a two-stage ballast using the inverter stage of the ac-chopper ballast with a separate power factor correction stage is provided. [ABSTRACT FROM PUBLISHER]
- Published
- 2014
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