Three phase induction motor is one of the most widely used motors as industrial, commercial and residential load. This motor has the simplest construction, reliable in operation, low initial cost, easy operation, simple maintenance, high efficiency and simple speed control. The popularity of this motor has resulted into lot of research including the transient behaviour of the motor. In this pap...

The wind energy is free, inexhaustible and it produces no waste or greenhouse gases. Furthermore, it is a good method of supplying energy to remote areas. With growing application of wind energy conversion systems (WECSs), various technologies are developed for them. Squirrel cage induction motors are the most commonly used electrical machine in AC drives. In this paper, a new wind energy conve...

This paper proposes a new diagnosis algorithm to detect broken rotor bars (BRBs) faults in induction motors. The proposed algorithm is composed of a frequency signal dimension order (FSDO) estimator and a fault decision module. The FSDO estimator finds a number of fault-related frequencies in the stator current signature. In the fault decision module, the fault diagnostic index from the FSDO es...

The detection of broken rotor bars in three-phase squirrel cage induction motors by means of current signature analysis is presented. In order to diagnose faults, a Neural Network approach is used. At first the data of different rotor faults are achieved. The effects of different rotor faults on current spectrum, in comparison with other fault conditions, are investigated via calculating Power ...

This paper presents a method for determining the load capacity of three-phase squirrel-cage induction motors supplied with balanced distorted voltage containing rotating harmonics (1st, 5th, 7th, 11th, 13th,...). The is based on dependence motor power losses in rotor cage. was determined short-circuit measurements made frequencies equal to harmonic frequencies. To evaluate capacity, factor prop...

A fault diagnosis system based on pattern recognition techniques is developed for cage induction machine broken bar detection. The developed algorithm uses the stator current and, if available, motor speed as input data. Several features are extracted from the Frequency spectrum of the current signal derived using the Fast Fourier Transform. The relevance of the features for the purpose of faul...

Permanent magnet (PM) motors are rapidly replacing the squirrel cage induction for its energy efficient operation, smooth control and high power density. Although PM Motors efficient, they inherently affected by cogging torque ripple. Magnetic alignment between teeth of stator permanent rotors produce torque. Torque ripple is a dynamic oscillation during steady-steady operation which leads to v...

Original scientific paper This paper discusses the risks of ignition sources of electric motors in areas at risk of explosive atmospheres. The basis for this work is research on the occurrence of the source of ignition resulting from an induction motor rotor cage fault. The research was targeted at the heating effects on the rotor cage of the "Ex e" type of protection motor, as a result of diff...