TY - JOUR
T1 - Electronic ballast for fluorescent lamps with phase-locked loop control scheme
AU - Lin, Ray Lee
AU - Chen, Yen Tsou
N1 - Funding Information:
Manuscript received October 6, 2004; revised July 8, 2005. This work was supported by the National Science Council of Taiwan, R.O.C., under Awards NSC 92-2213-E-006-87 and NSC 93-2213-E-006-138. Recommended by Associate Editor J. M. Alonso. R.-L. Lin is with the Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan, R.O.C. (e-mail: rayleelin@ee.ncku.edu.tw). Y.-T. Chen is with ACBEL Company, Taipei 251, Taiwan, R.O.C. Digital Object Identifier 10.1109/TPEL.2005.861180
PY - 2006
Y1 - 2006
N2 - This paper proposes a phase-locked loop (PLL) control scheme for the electronic ballast employing a parallel-serial resonant tank (PSRT), in which the resonant frequency of the circuit is continuously tracked, in order to drive the fluorescent lamps even with low equivalent resistance at steady-state. Compared with the conventional PLL control of the electronic ballasts for cold cathode fluorescent lamps, the proposed PLL control scheme, by sensing the phase signals at the both ends of the resonant inductor, is able to have resonant frequency tracked for the electronic ballasts, where the equivalent resistance of the fluorescent lamps is even equal to hundreds of ohms or lower at steady-state. By employing the current regulator circuit, the proposed PLL controller regulates the values of the lamp's current by adjusting the operating frequency from the resonant frequency as a reference frequency point, the lamp's current is accurately controlled. The analysis of the proposed PLL control scheme will be presented in this paper. Finally, the implementation of a prototype circuit is provided to demonstrate the performance of the proposed PLL control scheme by associating with a current regulator circuit.
AB - This paper proposes a phase-locked loop (PLL) control scheme for the electronic ballast employing a parallel-serial resonant tank (PSRT), in which the resonant frequency of the circuit is continuously tracked, in order to drive the fluorescent lamps even with low equivalent resistance at steady-state. Compared with the conventional PLL control of the electronic ballasts for cold cathode fluorescent lamps, the proposed PLL control scheme, by sensing the phase signals at the both ends of the resonant inductor, is able to have resonant frequency tracked for the electronic ballasts, where the equivalent resistance of the fluorescent lamps is even equal to hundreds of ohms or lower at steady-state. By employing the current regulator circuit, the proposed PLL controller regulates the values of the lamp's current by adjusting the operating frequency from the resonant frequency as a reference frequency point, the lamp's current is accurately controlled. The analysis of the proposed PLL control scheme will be presented in this paper. Finally, the implementation of a prototype circuit is provided to demonstrate the performance of the proposed PLL control scheme by associating with a current regulator circuit.
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U2 - 10.1109/TPEL.2005.861180
DO - 10.1109/TPEL.2005.861180
M3 - Article
AN - SCOPUS:33947109458
VL - 21
SP - 254
EP - 262
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
SN - 0885-8993
IS - 1
ER -