Analysis and design of a self-oscillating class E ballast for compact fluorescent lamps

The Class E inverter is the basis for a low-cost high-frequency ballast, but the control system is more complex than the self-oscillating Class D inverter. The added complexity neutralizes any cost savings gained by the single switch inverter. This paper explores a novel self-oscillating Class E ballast from a design perspective. A qualitative analysis shows how this self-oscillating system operates, from startup, through ignition to the steady state. Optimum component values are found from a quantitative analysis of the inverter. This mathematical model is the basis for the design methodology. Analytical results are compared with the physical model.

[1]  M. Kazimierczuk,et al.  Resonant Power Converters , 1995 .

[2]  No Sokal,et al.  CLASS-E - NEW CLASS OF HIGH-EFFICIENCY TUNED SINGLE-ENDED SWITCHING POWER AMPLIFIERS , 1975 .

[3]  Marian K. Kazimierczuk.  Class E tuned power amplifier with nonsinusoidal output voltage , 1986 .

[4]  M. Radecker,et al.  Single-chip class-E converter for compact fluorescent lamp ballast , 1997, 1997 IEEE International Solids-State Circuits Conference. Digest of Technical Papers.

[5]  Jaime Arau,et al.  Analysis of the class E amplifier with two current sources used as a high-power-factor electronic ballast for fluorescent lamps , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).

[6]  Marian K. Kazimierczuk,et al.  Exact analysis of class E tuned power amplifier at any Q and switch duty cycle , 1987 .

[7]  E. E. Hammer.  Comparative Starting-Operating Characteristics of Typical F40 Systems , 1989 .

[8]  K. Harada,et al.  A self-excited electronic ballast for electrodeless fluorescent lamps operated at 10 MHz , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[9]  J. C. Mandojana,et al.  A discrete/continuous time-domain analysis of a generalized class E amplifier , 1990 .

[10]  L.R. Nerone.  A complementary Class D converter , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[11]  M. Kazimierczuk,et al.  Class E high-efficiency tuned power oscillator , 1981 .