This paper discusses a novel method for motor fault detection under varying load conditions. Winding Function Approach (WFA) is used to develop a mathematical model to provide indication references for parameters under different load levels and different fault situations. Broken bar defects reference indexes are developed to assess rotor fault severity based on stator current and rotor speed. S...

To carry out the induction machine analysis under dynamic, transient and steady state conditions, the analytical techniques are used to simulate the TPIM. Here, the Park’s transformation is used to transform balanced 3-Φ currents ia,ib, and ic to balanced 2-Φ currents iα, and iβ to accurately model the TPIM. In this paper, an accurate mathematical model is developed for induction motor and the ...

Permanent Magnet Machines (PMM) with a phase number (m) higher than three allow redundancy and lower torque ripple compared to their three phase counterparts. In this paper, a six phase permanent magnet machine with surface rotor magnets, designed with fractional slot tooth winding is proposed. A stator design with fractional slot tooth winding allows the design of a compact machine through sho...

Rotor and stator temperature are of concern in both shortterm machine protection and in longer term condition monitoring for large induction machines. Especially, when operating with overload cycles, it is necessary to monitor rotor bars and stator winding temperatures to make sure that the temperature remains below prescribed limits. The purpose of this paper is to present a thermal monitoring...

Induction motors are usually considered as one of the key components in various applications. To maintain the availability of induction motors, it calls for a reliable condition monitoring and prognostics strategy. Among the common induction motor faults, stator winding faults are usually diagnosed with current and voltage signals. However, if the same performance can be achieved, the use of vi...

A simple method to demodulate the resolver signal is introduced in this article. The proposed method can provide the demodulated resolver quadrature signals, sine and cosine, without requiring the resolver excitation signal as the carrier signal. Therefore, the phase delay between the stator winding and the rotor winding is avoided. The configuration of this approach consists of commercial avar...

This paper presents the application of neural networks for the non-differential protection of salient-pole synchronous generator against internal faults in any winding of the stator. The direct phase quantities and modified winding function approach has been used to simulate different types of internal and external faults using electrical parameters of generators installed by utilities. The cas...

This paper introduces a sensorless nonlinear control scheme based on feedback linearization (FLC) of an open-end winding five-phase induction motor (OeW-5PIM) topology fed by dual neutral point clamped (NPC) inverter. The suggested is combined with the sliding mode (SM) controller to improve dynamic performance (i.e., rising time, overshoot, etc.) studied motor. Furthermore, stator-current-base...

Motors are critical components for electric utilities and process industries. A motor failure can result in the shutdown of a generating unit or production line, or require that redundant plant be utilized to circumvent the problem. One major cause of failures is breakdown of the tum insulation leading to puncture of the groundwall. Early detection of intertum shorts during motor operation woul...

This paper utilizes the wavelet packet transform to study the effects of decreasing the number of slots per pole per phase on the harmonic behavior of the working flux density in the air gap. A surface mounted PM motor is used as an example. The original design contains 6 PM poles and 36 stator slots with three phase winding embedded. The rotor is redesigned to have 4, 8, and 12 poles mounted o...