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Content Provider | IET Digital Library |
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Author | Guo, Shilin Su, Jianhui Chen, Xuejian Yu, Xiang |
Abstract | An isolated fully soft-switching single-stage three-level power amplifier (SS3L) based on dual auxiliary networks (DAN) is proposed in this Letter. Compared with the conventional class-D power amplifier, the proposed DAN-SS3L achieves high level of integration without bulky dc link capacitor, and high-efficiency by single-stage conversion and zero voltage switching for all the switches under different operating conditions from light load to full load, which is suitable for high-voltage audio distribution systems. By adopting active auxiliary network, the energy stored in the leakage inductor can be recycled, which eliminates the pulse width modulation voltage spikes. The passive auxiliary network provides enough reactive current for primary-side switches, extending soft-switching range. In addition, commutation overlap strategy is employed to enable natural commutation of bidirectional switches. Experimental results of a 200 W prototype are presented to verify the analysis results. |
Starting Page | 1797 |
Ending Page | 1799 |
Page Count | 3 |
ISSN | 00135194 |
Volume Number | 52 |
e-ISSN | 1350911X |
Issue Number | Issue 21, Oct (2016) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/el/52/21 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/el.2016.2220 |
Journal | Electronics Letters |
Publisher Date | 2016-09-08 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Active Auxiliary Network Amplifiers Audio Equipment And System Audio System Bidirectional Switches Commutation Commutation Overlap Dual Auxiliary Network High-voltage Audio Distribution System Inductor Inductors And Transformer Isolated Fully Soft-switching Leakage Inductor Natural Commutation Passive Auxiliary Network Power 200 W Power Amplifier Power Electronics Power Supply Primary-side Switches Pulse Width Modulation Pulse Width Modulation Voltage Spikes Reactive Current Single-stage Conversion Single-stage Three-level Power Amplifier Supervisory Circuit Switched Mode Converter Zero Current Switching Zero Voltage Switching |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering |
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