Research on Transient DC Bias Analysis and Suppression in EPS DAB DC-DC Converter
| Autor: | Jinggang Qin, Jiangang Li, Jingyu Zhai, Lican He, Tianli Dai, Gao Ge, Chao Zhou |
|---|---|
| Přispěvatelé: | Energy, Materials and Systems |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
dc~bias
Steady state (electronics) Materials science General Computer Science business.industry General Engineering Electrical engineering Phase (waves) Superconducting magnet law.invention Power (physics) transient extend-phase-shift (TEPS) control strategy law Dual-active-bridge (DAB) General Materials Science high-field SMPS Transient (oscillation) lcsh:Electrical engineering. Electronics. Nuclear engineering Transformer business lcsh:TK1-9971 Voltage DC bias |
| Zdroj: | IEEE Access, 8:9046035, 61421-61432. IEEE IEEE Access, Vol 8, Pp 61421-61432 (2020) |
| ISSN: | 2169-3536 |
| Popis: | During excitation and demagnetization phase for the superconducting magnet, in dual-active-bridge (DAB) converter based power supply, a dc bias may occur in high-frequency transformer and thus lead to the faults. In this paper, an improved transient extend-phase-shift (TEPS) control strategy is proposed to suppress the dc bias without any additional hardware. Unlike the traditional extend-phase-shift (EPS) strategy, the voltages of the transformer are asymmetrical for half a period after changing phase-shift and then remain symmetrical. This makes it take half a switching period for the current of transformer to reach the steady state, and then eliminates the dc bias. The experiment verifies the performance on dc bias suppression. This method provides a good theoretical and experimental basis for the EPS DAB DC-DC converter to realize the optimal control for excitation and demagnetization system in high-field superconducting magnet power supply (SMPS). |
| Databáze: | OpenAIRE |
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