One-Chip Class-E Inverter Controller for Driving a Magnetron

A one-chip class-E inverter controller is implemented in a 0.35 mum standard CMOS process. The control IC generates a control signal to turn on or off the insulated-gate bipolar transistor switch of the class-E inverter power supply driving a magnetron load which generates 2.45 GHz microwave for heating. It provides active power factor correction, soft start, and thermal protection. The rated RF output power of the magnetron is around 1.2 kW for a 100 V AC line, and an input power factor of over 0.98 is maintained. The proposed integrated solution gives better system performance with lower cost than conventional discrete solutions.

[1]  Sam Ben-Yaakov,et al.  The simplest electronic ballast for HID lamps , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[2]  Meng Jin,et al.  Power Converter EMI Analysis Including IGBT Nonlinear Switching Transient Model , 2006, IEEE Transactions on Industrial Electronics.

[3]  Dong-Seok Hyun,et al.  A study on the new control scheme of Class-E inverter for IH-jar application with clamped voltage characteristics using pulse frequency modulation , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[4]  N. O. Sokal.  Class E high-efficiency switching-mode tuned power amplifier with only one inductor and one capacitor in load network-approximate analysis , 1981 .

[5]  Izuo Hirota,et al.  Voltage-clamped soft switching PWM inverter-type DC-DC converter for microwave oven and its utility AC side harmonics evaluations , 2000, Proceedings IPEMC 2000. Third International Power Electronics and Motion Control Conference (IEEE Cat. No.00EX435).

[6]  P.C. Sen,et al.  A novel resonant converter topology for DC-to-DC power supply , 1995, IEEE Transactions on Aerospace and Electronic Systems.

[7]  Louis R. Nerone.  Analysis and design of a self-oscillating class E ballast for compact fluorescent lamps , 2001, IEEE Trans. Ind. Electron..

[8]  C. Q. Lee,et al.  A unified averaging technique for the modeling of quasi-resonant converters , 1998 .

[9]  G. Kimura,et al.  Characteristics of ballast for HID lamps using single-ended resonant-type MCT inverter , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[10]  Gyu-Hyeong Cho,et al.  Voltage-Clamped Class-E Inverter With Harmonic Tuning Network for Magnetron Drive , 2006, IEEE Transactions on Circuits and Systems II: Express Briefs.

[11]  Tsuneko Nakazawa,et al.  Development Of Compact inverter power supply for microwave oven , 1991 .

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

[13]  Tadashi Suetsugu,et al.  Feasibility study of on-chip class E DC-DC converter , 2003, Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03..

[14]  Z. Kaczmarczyk.  High-Efficiency Class E,$hboxEF_2$, and$hboxE/F_3$Inverters , 2006, IEEE Transactions on Industrial Electronics.

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

[16]  Mutsuo Nakaoka,et al.  Pulse width and pulse frequency modulation pattern controlled ZVS inverter type AC-DC power converter with lowered utility AC grid side harmonic current components for magnetron drive , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[17]  Sang Kyung Kim,et al.  A Low-Cost High-Efficiency CCFL Inverter With New Capacitive Sensing and Control , 2006, IEEE Transactions on Power Electronics.

[18]  Jian Sun,et al.  On the zero-crossing distortion in single-phase PFC converters , 2004, IEEE transactions on power electronics.

[19]  Frederick H. Raab,et al.  Idealized operation of the class E tuned power amplifier , 1977 .

[20]  M. Kazimierczuk.  Exact analysis of class E tuned power amplifier with only one inductor and one capacitor in load network , 1983 .

[21]  Nam-Ju Park,et al.  A Power-Control Scheme With Constant Switching Frequency in Class-D Inverter for Induction-Heating Jar Application , 2007, IEEE Transactions on Industrial Electronics.

[22]  Issa Batarseh,et al.  Single-switch zero-voltage-switching high power factor electronic ballast , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

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