Common-mode voltages are a common phenomenon when variable speed drives (VSD) are employed to control motors. There are many advantages of using VSDs in motors. Speed/torque control, and power consumption …
The presence of harmonic current in a power system increases the current in the neutral conductor due to phase current imbalance (refer to Fig. 1b). To ascertain that the current-carrying …
Before the advent of computers, variable speed drives, soft starters and other non-linear loads, the only source of harmonics in power systems are industrial plants using arc-furnaces. These arc-furnaces require …