Affiliation:
1. Shijiazhuang Information Engineering Vocational College
2. China Marine Development & Research Center
Abstract
A high efficiency switch-mode power amplifier based on a cascaded multicell multilevel circuit topology is introduced in the paper. A multicell topology being operated in a unipolar phase-shifted PWM control to switch-mode amplifier system is introduced. After analysising a single-phase H-bridge unipolar PWM inverter’s output, the paper emphasis on the researching of the output of a Cascaded Multilevel Class-D Power Amplifier. The paper analyzes the advanced characteristic of the cascaded multilevel technique. Then a cascaded multilevel class-D power amplifier is built in the laboratory. The result of measurement shows a good following performance and stability.
Publisher
Trans Tech Publications, Ltd.
Reference8 articles.
1. Stanley G R, Bradshaw K M. Precision DC-to-AC power conversion by optimization of the output current waveform-The half-bridge revisited , In: Proceeding of the 28th IEEE power Electronics Specialists conference, St. Louis, Missouri, USA, , vol. 35(1997).
2. Isao Takahashi, Kazuki Iways. High efficiency low harmonic distortion switching type power amplifier using multilevel inverter , In: Power conversion conference, Osaka, Japan. ( 2002).
3. H. Ertl, J.W. Kolar and F. C. Zach, Basic considerations and topologies of switched-mode assisted linear power amplifiers, IEEE Trans . Ind. Electron, vol. 44(1997), pp.116-122.
4. WU Hong-yang, HE Xiang-ning. Relationspbip between multilevel carrier-based PWM and SVPWM and its applications , Proceeding of the CESS, vol. 22 ( 2002), pp.10-15.
5. HUO Shao-Cheng, WANG Yong-Ji, Discrete variable structure controller for a brushless dc motor drive , Proceeding of the CESS, vol. 24 (2004), pp.96-99.