Field analysis of TWT HVPS transformer and HV module

Kim, S.C.; Nam, Sang Hoon; Kim, D.T.; Ha, Kuendong; Jeong, Soo‐Hwan; Park, D.S.; Kwon, H.M.; Chun, Jaeyoon

doi:10.1109/modsym.2002.1189526

Cited by 3 publications

(1 citation statement)

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“…From the fundamental parameters, turn ratios of the transformer are calculated as 16. 4 From the fundamental parameters, turn ratios of the transformer are calculated as 15.4 and 7.2 for 4.1 and 1.9 kV secondary outputs, respectively. In the case of direct winding of the transformer, turn ratios are relatively large and, thus, increase the values of parasitic elements, such as leakage inductance and parasitic capacitance.…”

Section: Introductionmentioning

confidence: 99%

Development of High-Power Density, 4-kV Pulse Transformers for TWTA

Kim

Nam

Kim

2004

IEEE Trans. Plasma Sci.

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Pulse transformers suitable for high-frequency and high-voltage operations in a traveling-wave tube amplifier (TWTA) had been designed, fabricated, and tested. Two transformers with different operation frequency of 100 and 80 kHz were designed, fabricated, and tested. The transformer with 100-kHz switching frequency had input and output voltages of 250 Vdc and 4.1 kV, respectively. Operating power was 3.06 kW. Achieved power density of the 100-kHz transformers was 22.26 W/cm 3 . The transformer with 80-kHz switching frequency had input and output voltages of 265 Vdc and 4.1 kV, respectively. Normal operating power of the transformer was 1.67 kW. Achieved power density of the 80-kHz transformer was 12.15 W/cm 3 . Three different winding arrangements for the 80-kHz transformer were tested and it was found that the one with a sandwiched primary between secondary windings had the best performance in electrical characteristics. It was possible to reduce the stray capacitance while maintaining low-leakage inductance with the best arrangement. Therefore, the self-resonant frequency was far separated from the operating frequency, and, thus, the new arrangement minimized the self-resonant current that is generally one of source for transformer temperature rise.Index Terms-High-power density, pulse transformer, travelingwave tube amplifier (TWTA).

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Section: Introductionmentioning

confidence: 99%