Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 30, Issue 6, Pages 3200-3214Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2014.2331494
Keywords
Peak to average power ratio; power control; power transistors; radio frequency amplifiers; resonant inverters; soft switching
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Single-Switch inverters such as the conventional Class-E inverter are often highly load sensitive, andmaintain zero-voltage switching over only a narrowrange of load resistances. This paper introduces a design methodology that enables rapid synthesis of Class E and related single-switch inverters that maintain ZVS operation over a wide range of resistive loads. We treat the design of Class-E inverters for variable resistance operation and show how the proposed methodology relates to circuit transformations on traditional Class-E designs. We also illustrate the use of this transformation approach to realize Phi(2) inverters for variable-resistance operation. The proposed methodology is demonstrated and experimentally validated at 27.12 MHz in a Class E and F2 inverter designs that operate efficiently over 12: 1 load resistance range for an 8: 1 and 10: 1 variation in output power, respectively, and a 25-W peak output power.
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