Title :
Class E amplifier operating from a short circuit to an open circuit
Author :
Kazimierczuk, Marian K. ; Bui, Xung T.
Author_Institution :
Dept. of Electr. Eng., Wright State Univ., Dayton, OH, USA
Abstract :
It is shown that a Class E tuned power amplifier can be improved by adding an inductive impedance inverter. This improvement ensures that zero-voltage switching of the transistor can be achieved over a very wide range of the load resistance. In the extreme case, the load resistance may vary from zero to infinity. Therefore, the amplifier is suitable for many applications, such as resonant DC/DC power converters and high-frequency power sources for electric induction or dielectric process heating. The authors present the design procedure and experimental results for a Class E amplifier with an inductive impedance inverter. Experimental waveforms and characteristics measured at 1 MHz with an IRF620 MOSFET are given for an amplifier that can operate under zero-voltage switching conditions for load resistances ranging from a short circuit to an open circuit
Keywords :
invertors; power amplifiers; power convertors; power supplies to apparatus; 1 MHz; Class E tuned power amplifier; IRF620 MOSFET; dielectric process heating; electric induction; high-frequency power sources; inductive impedance inverter; open circuit; power supplies to apparatus; resonant DC/DC power converters; short circuit; zero-voltage switching; Circuits; Electric resistance; H infinity control; High power amplifiers; Impedance; Inverters; MOSFETs; Power amplifiers; Resonance; Zero voltage switching;
Conference_Titel :
Aerospace and Electronics Conference, 1989. NAECON 1989., Proceedings of the IEEE 1989 National
Conference_Location :
Dayton, OH
DOI :
10.1109/NAECON.1989.40220
