Bearing currents resulting from common-mode voltage

For voltage or current source inverters, the common-mode voltage (CMV) contains high rates of change of voltage with respect to time (high dV/dt), so its frequency content can be in the MHz range.

Common mode currents are created due to capacitive coupling of the CMV, since I = C×dV/dt, where “C” is the capacitance of the common mode circuit element. There are many potential current paths via this capacitive coupling from the motor stator winding to ground, many of which are considered as insulators.

Linqing Nine Star Bearing Science & Technology Co., Ltd            

(Insulated bearing, Hybrid ceramic bearing and  Brass cage DGBB)

Follow us via E-mail info@jxkjzc.com; Website www.ninestarbearing.com.