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High-power pulsewidth controlled current source GTO inverter for high switching frequency

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4 Author(s)
Holtz, J. ; Wuppertal Univ., Germany ; Stamm, M. ; Thur, J. ; Linder, A.

High-power GTO inverters require regenerative snubbers to ensure operation at predefined values of di/dt and du/dt. The use of regenerative snubbers for voltage source inverters is a well established technology. However, the proliferation of high-power PWM current source inverters is impeded by the nonavailability of an appropriate regenerative snubber scheme. The paper proposes a regenerative snubber for current source GTO inverters and reports experimental results of a 1.2 MVA prototype inverter. Energy recovery from the snubbers enables operation at extreme high switching frequency of 1 kHz and reduces the total filter kVA from 70% to 20% of the inverter power

Published in:

Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE  (Volume:2 )

Date of Conference:

5-9 Oct 1997

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