イミタンスコンバータの効率特性に関する検討

抄録

The immittance converter has an input impedance that is proportional to the admittance of loads 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 its switching frequency, and is not suitable for power electronics application. So we proposed five types of immittance converters that consist of lumped elements L, C and show improved immittance conversion characteristics at a resonant frequency.
The efficiency 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 voltagecurrent transformation characteristics and efficiency characteristics of T-LCL and π-CLC types immittance converters which consist of L, C elements with losses. These were determined analytically and experimentally.