Hybrid Type Immittance Converter

Abstract

The immittance converter has an inputt impedance that is proportional to the admittance of a load connected across output terminals. Therefore. in this converter. the output current is proportional to the input voltage and the input current is proportional to the output voltage. Consequently. it converts a constant voltage source into a constant current source and a constant current source into a constant voltage source.
It is well known that the quarter-wavelength transmission line shows immittance conversion characteristics. However. it has very long line length for the switching frequency of converters and is not suitable for power electronics application. So we proposed five types of immittance converters that consist of lumped elements L. C and showed improved immittance conversion characteristics at a resonant frequency.
The output characteristics and efficiency characteristics of an immittance converter is the most important parameter when it is used in practical applications in a high frequency link. In this paper we show voltage-current transformation characteristics. current-voltage transformation characteristics and efficiency characteristics of a Hybrid type immittance converter which consist of L. C elements with losses. The excellent characteristics were confirmed analytically and experimentally.