Triple buck converter – an efficient low-distortion switch-mode power amplifier topology

The Journal of Engineering

Johann Walter Kolar¹  Mario Mauerer¹ 

[1] ETH Zurich;

关键词: bridge circuits;    inductors;    harmonic distortion;    dc-dc power convertors;    mechatronics;    amplifiers;    power convertors;    switched mode power supplies;    switching convertors;    power amplifiers;    power levels;    triple buck converter;    low-distortion switch-mode power amplifier topology;    high conversion efficiency;    low-output signal distortion;    ultra-high precision amplifiers;    nanometre-accuracy mechatronic positioning applications;    integrated semiconductor manufacturing;    efficient class-d power stage;    inherent half-bridge interlock time;    dual buck conversion stage;    half-bridge switching waveforms;    low-harmonic output signal distortion;    converter stages;    conversion efficiencies;    output total harmonic distortion values;    noise figure -100.0 db;   

DOI  :  10.1049/joe.2019.0019

来源: DOAJ

【 摘 要 】

A switch-mode power amplifier topology that can achieve both a high conversion efficiency and low-output signal distortion is introduced. Such systems are desirable for ultra-high precision amplifiers that, for example, drive actuators in nanometre-accuracy mechatronic positioning applications in integrated semiconductor manufacturing. An efficient Class-D power stage, which is limited in output signal quality due to its inherent half-bridge interlock time, is combined through a magnetically coupled inductor with a dual buck conversion stage that does not require interlock time and, due to its circulating bias current that defines the half-bridge switching waveforms, achieves very low-harmonic output signal distortion. The control system can seamlessly adjust the current sharing of the two converter stages such that overall conversion efficiencies over 95% and output total harmonic distortion values below −100 dB are achievable at power levels up to several kilowatts. Detailed computer simulations demonstrate the feasibility of the concept.

【 授权许可】

Unknown