| Abstract |
The authors present a new model to evaluate the over-voltages caused partially by the
length of the cables feeding motors driven by PWM-controlled inverters. Using the mobile waves
theory, a full mathematical formula describing the evolution of the transient voltage at the motor
terminals was developed. It takes into account all the parameters on which over-voltages depend in
the ASD-motor systems, particularly the cable length, as well as the inverter output voltage rise and
fall times. The proposed model, based on this mathematical formula, allows the coordination
between the ASD-Motor systems and the length of their feeding cables. The model is validated by
simulation, using Matlab/Simulink software, and by experimental results. |
