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Electronic Ballast for Metal Halide Lamps Using a Quasi-Resonant Inverter With Digital Control.
- Source :
-
IEEE Transactions on Industrial Electronics . Dec2011, Vol. 59 Issue 4, p1825-1840. 16p. - Publication Year :
- 2011
-
Abstract
- A digital control electronic ballast for the metal halide lamp is proposed based on the low-frequency square wave, and a comprehensive control strategy is employed for the zero-voltage-switching quasi-square-wave dual buck converter. To achieve the self-adaptive zero-voltage-switching control, the digital control method is used, which greatly reduces the switching losses of the circuit. A single-cycle-peak-current control method is adopted to restrain the overcurrent generated by reversing during the low-frequency transition from the turn-on to the steady state. The complicated process of igniting is analyzed in detail, and a constant-current control method is proposed to diminish the power overshoot and to decrease the current and voltage stress in the transition stage. A power closed-loop duty ratio control method is adopted, and its correctness is proved. An experimental prototype of 70 W is implemented, and the system can achieve reliable operation from the transient state to the steady state, with the highest efficiency of 92% and with no acoustic resonance occurring. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02780046
- Volume :
- 59
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Industrial Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 66964595
- Full Text :
- https://doi.org/10.1109/TIE.2011.2141100