This paper presents an Active Voltage Control technique, for series connected freewheel diodes in bridge legs, which suppresses the oscillation due to diode snap recovery, and clamps the overshoot sustained during reverse recovery. The need to utilise passive snubbers with this active voltage control technique to overcome the shortcoming of the active clamping, is analysed. This technique allows active balancing of the reverse voltage sharing among series connected free-wheel diodes. Experimental results are presented for the suppression of the oscillation seen by the free-wheeling diodes and the active clamping of the overshoot voltage with and without passive snubbers.
|Title of host publication||2004 IEEE 35th Annual Power Electronics Specialists Conference|
|Number of pages||6|
|Publication status||Published - 2004|
|Event||2004 IEEE 35th Annual Power Electronics Specialists Conference - Aachen, Germany|
Duration: 20 Jun 2004 → 25 Jun 2004
|Conference||2004 IEEE 35th Annual Power Electronics Specialists Conference|
|Period||20/06/04 → 25/06/04|