| Title |
On-Line Assessment of High Voltage Motor Condition using the Motor Performance Monitor |
| Authors |
김희동(Kim, Hee-Dong) ; 공태식(Kong, Tae-Sik) |
| Keywords |
High Voltage Motor ; Motor Performance Monitor ; Rotor Bar ; Assessment ; End-ring Fault |
| Abstract |
The condition of a high voltage motor was monitored with the motor performance monitor (MPM) at the motor control center. The MPM detected defects in the rotor bar and end ring and input power according to motor and load conditions. The assessment of the condition of a coal pulverizer motor indicated it was clearly in good condition in terms of the rotor bars, over voltage, and motor performance. However, the side bands at frequency, 56.48 Hz indicated existence of rotor end-ring fault. The large torque ripple indicated abnormal operating conditions. After visual inspection, it has been observed that an impeller blade of the circulating water pump was broken off causing the irregular torque pattern. |