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A high‐efficiency diode‐clamped linear amplifier
Author(s) -
Fujita Hideaki
Publication year - 2008
Publication title -
electronics and communications in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.131
H-Index - 13
eISSN - 1942-9541
pISSN - 1942-9533
DOI - 10.1002/ecj.10120
Subject(s) - electrical engineering , clamper , harmonics , electronic engineering , inverter , diode , engineering , amplifier , power mosfet , mosfet , power (physics) , topology (electrical circuits) , computer science , physics , transistor , voltage , cmos , quantum mechanics
Abstract This paper proposes a new power converter without any switching operation and which works as a linear amplifier. The main circuit of the proposed converter consists of series‐connected MOSFETs, series‐multi DC power supplies, and clamping diodes. The circuit configuration is similar to a diode‐clamped multi‐level inverter, except for using complementary power devices, which are n‐ and p‐channel MOSFETs. One of the series‐connected MOSFETs operates in an active state just like a linear amplifier, while the other MOSFETs operate in on or off states like an inverter circuit. As a result, the proposed converter achieves an acceptable efficiency as high as 90% without any ripples or harmonics caused by switching operation. Experimental results demonstrate that the proposed converter has the capability to drive a 2.2‐kW three‐phase induction motor. © 2008 Wiley Periodicals, Inc. Electron Comm Jpn, 91(6): 47–56, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecj.10120