Reflected waves and their associated current

Abstract: Reflected wave transient voltages that result from fast IGBT voltage source inverters have received considerable investigation. The modeling and simulation of these transients requires sophisticated motor and cable models. Most voltage source PWM adjustable speed drive suppliers now provide combinations of passive and active control techniques to mitigate the adverse effects of over voltage stress, however, the cost of the passive fixes often exceed the cost of the drive. Another aspect of low rise time devices, heretofore not examined to the extent of the over voltage problem, is the resulting current from traveling waves. In this paper a historical perspective of the over voltage problem is presented. Models of system components are reviewed and simulation results are compared with experimental results. These models are then employed to predict the peak currents from voltag