Kwanghwan Lee

TL;DR: In this article, a sensorless on-line monitoring technique for detecting and classifying stator turn faults and high-R electrical connections in induction machines based on the zero sequence voltage or negative sequence current measurements is proposed.

TL;DR: In this paper, a new automated technique for testing voltage source inverter-fed squirrel-cage induction machines at a standstill for rotor faults is proposed, which uses the inverter to excite the machine with a pulsating field at a number of angular positions to observe the variation in the impedance pattern due to broken rotor bars, whenever the motor is stopped.

TL;DR: In this article, a new strategy for monitoring the condition of adjustable speed induction machine drive systems is presented, which uses the inverter to perform off-line tests for quality assessment of the vulnerable components in the inverters, cable, and induction motor automatically whenever the motor is stopped.

TL;DR: In this article, a new automated technique for testing inverter-fed squirrel cage induction machines at standstill for rotor faults is proposed, which uses the inverter to excite the machine with a pulsating field at a number of angular positions to observe the variation in the impedance pattern due to broken rotor bars whenever the motor is stopped.

TL;DR: In this article, a new method for monitoring the quality of the stator core for inverter-fed induction machines without motor disassembly or operation is proposed, where the inverter is used to apply a set of test signals to assess the core quality whenever the motor is at standstill and the power loss is observed as a function of field circumferential position.