A Series-Connected 12-Pulse Rectifier Based on the Isolated Transformer with Symmetrical Windings

Wang, Yalan; Wang, Ying

doi:10.1007/978-981-16-9905-4_63

Cited by 1 publication

(2 citation statements)

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“…Figure 13 shows the equivalent circuit of the rectifier in this fault condition. When Q is short‐circuited, due to the existence of a certain impedance in the transformer winding, the injected current i i will approximately straight through between E and F. At this state, the HAC fails and the rectifier system will operate according to the characteristics of the basic series 12‐pulse rectifier, which is consistent with the 12‐pulse rectifier operating conditions in [6].…”

Section: Operation Performance Analysis Of the Rectifiersupporting

confidence: 63%

“…Among all series rectifiers, the 12‐pulse rectifier has significant advantages for low‐footprint application scenarios due to its simple structure, small size, and high reliability [5]. However, conventional series 12‐pulse rectifiers with filter inductors on the source side have a high theoretical total harmonic distortion (THD) value of 15.2% for the AC side voltage, which prevents them from being applied directly in the industry [6]. As a result, it is necessary to improve MPRs' harmonic suppression capability.…”

Section: Introductionmentioning

confidence: 99%

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A new series‐connected 36‐pulse rectifier with hybrid DC‐reinjection method for high power output

Wang

Chen

et al. 2023

IET Power Electronics

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In this study, a new 36‐pulse rectifier with a hybrid DC‐reinjection circuit is proposed. It multiplies the AC‐side input voltage steps from 12 to 36 using a hybrid auxiliary circuit for voltage and current modulation. Both the AC and DC side harmonics of the rectifier system are efficiently suppressed when combined with filter capacitors at DC side. Only 2 more diodes and an IGBT are used in the proposed approach for constituting the injection circuit. The cascaded structure of rectifier bridges allows for significant voltage gain, making it appropriate for high power output rectification applications. The proposed 12‐pulse rectifier's phase shifting structure and 36‐pulse rectifier's operational theory are introduced. The injection transformer's turn ratio and the IGBT's conduction angle are both designed to have the lowest possible harmonic distortion of the voltage at AC side. Analyses are done on the rectifier's impedance matching feature and energy loss of IGBT. The operating performance of the rectifier is assessed when the active switch fails. With the help of a 1.8 kW prototype and a HIL system based on Starsim, the theoretical portion is confirmed. The results of the simulation and experiments support the effectiveness of the hybrid voltage harmonic injection method studied.

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Section: Operation Performance Analysis Of the Rectifiersupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%