A High Efficiency Linear Power Supply with Pure Sine Wave for High Voltage Test
| Autor: | Baichao Chen, Zhou Yuxiong, Gang Xue, Yaojun Chen, Cuihua Tian, Gao Wei |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
high voltage test supply
Computer Networks and Communications Computer science lcsh:TK7800-8360 02 engineering and technology 01 natural sciences law.invention Sine wave law power conversion 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Power semiconductor device Electrical and Electronic Engineering Transformer 010302 applied physics business.industry high efficiency power loss lcsh:Electronics 020208 electrical & electronic engineering Transistor Electrical engineering High voltage Thermal conduction Power (physics) Hardware and Architecture Control and Systems Engineering Signal Processing Partial discharge business Voltage drop Voltage |
| Zdroj: | Electronics, Vol 10, Iss 18, p 18 (2021) Electronics; Volume 10; Issue 1; Pages: 18 |
| ISSN: | 2079-9292 |
| DOI: | 10.3390/electronics10010018 |
| Popis: | The input part of the high-voltage test power supply is usually composed of switching devices; however, the pulse-type periodic interference caused by the switching devices makes the monitoring of the test power supply partial discharge more difficult. Therefore, this paper proposes a high-efficiency and distortion-free linear power supply based on piecewise-linearization with all N-type transistor. Under the same DC input, multiple power transistors are connected to different taps of the same transformer. By controlling the period of linear conduction of each power transistor in turn, we ensure that the power transistor works on the linear side (biased towards saturation) to reduce its conduction voltage drop and the output realizes sinusoidal piecewise linearization, so that the converter can greatly improve the system efficiency. After that, from the perspective of the lowest sum of the transistor loss, an optimization method for the design of the multi-winding transformer ratio at each stage is proposed. Finally, a power supply prototype based on four-piece linear converter with an output voltage of 220 V was built. The experimental efficiency reaches 87.03%, and, additionally, if the linear amplification is divided into more sections, the efficiency can be further improved. |
| Databáze: | OpenAIRE |
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