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Bus Voltage Control of Cascaded Buck-Boost Power Amplifier Driving Inductive Load With 2.3-kW Peak Power

Cited 4 time in Web of Science Cited 5 time in Scopus
Authors

Shin, Jong-Won; Danilovic, Milisav; Mao, Yincan; Ngo, Khai D. T.

Issue Date
2017-05
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol.32 No.5, pp.4107-4114
Abstract
Voltage of a bus capacitor in a cascaded buck-boost power amplifier is controlled to shape current in an inductive load. Switch-mode converter and inverter output higher power with higher efficiency than linear amplifiers. However, controlling current in the inductive load with low damping is not straightforward due to its inherent instability. Voltage-mode control of a front-end buck converter adjusts the envelope of the load current through a downstream resonant boost inverter and stabilizes the system. The resonant boost inverter is modeled into a low-frequency equivalent circuit, and a control loop is designed to avoid interaction between the buck converter and resonant boost inverter. Experimental results proved that the buck converter with the voltage loop of which bandwidth and phase margin are 150 kHz and 67 degrees shaped the envelope of load current into 10-kHz (23.5-kHz) sine wave when the average output power was 320W(90 W). Instantaneous maximum power of the prototype circuit was 2.3 kW and estimated efficiency was 96%.
ISSN
0885-8993
URI
https://hdl.handle.net/10371/201453
DOI
https://doi.org/10.1109/TPEL.2016.2594053
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  • College of Engineering
  • Department of Electrical and Computer Engineering
Research Area DC-DC and AC-DC power conversion, DC-DC 및 AC-DC 전력변환, converter modeling, high-density, high-frequency power conversion, 고밀도 고주파 전력 변환, 컨버터 모델링

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