A self-adjusting sinusoidal power source suitable for driving capacitive loads

Abstract

Abstract-A new self-adjusting current-fed push-pull parallel inverter (SA-CFPPRI) is presented and tested by simulation and experimentally. The power source includes a soft switching control circuitry and a controllable inductor. The SA-CFPPRI can drive a capacitive load at any frequency within the design range. It will maintain zero voltage switching of the main transistors and follow the input frequency signal even when the resonant elements and/or the load vary. Possible range of applications for the proposed power source is: piezoelectric transformers and motors, ac bus for a distributed power system and other loads that need to be fed by a sinusoidal waveform. The experimental results of the laboratory unit (160Vrms at 93kHz and nominal output power of 5W) verify the analytical analysis and proposed design procedure.

A new control method for electronic ballasts based on magnetic regulators

“…The detailed description of modeling, design and construction of a variable inductance is out of the scope of this paper and can be found in references [7] [8]. Interesting applications of the variable inductance in power electronics topologies can be found in references [9] [10]. …”