This article deals with standstill identification of an induction motor drive for sensorless self-commissioning purposes. The proposed method is based on advanced model a squirrel-cage motor. includes the deep-bar effect and magnetic saturation characteristics. excitation signals are fed to stator using standard inverter without compensating its nonlinearities. saturable inductance first identi...

In this paper, a series of tests were conducted on the bearings induction motors to investigate vibration signal analysis-based diagnosis bearing faults, and thorough analysis was also conducted. engineering field, kurtosis coefficient acceleration root mean square velocity, as well resonant demodulated spectrum acceleration, have been widely used for fault diagnosis. These are integrated in al...

This paper has proposed and substantiated the application of an additional diagnostic parameter for assessing state stator windings induction motors during operation. The dependences values phase shifts between currents voltages have been obtained. These showed that when inter-turn short circuit occurs in windings, are same all phases motor. That made it possible to obtain dependence change shi...

Rotor cage faults as broken rotor bars, increased bars resistance and end-ring faults can be caused by thermal stresses, due to overload, overheating and thus mechanical stresses, magnetic stresses and dynamic stresses due to shaft torques. Environmental stresses as contamination or abrasion also contributes to the rotor cage faults. The rotor cage faults can also lead to the shaft vibration an...

The advantages/disadvantages of energy storage devices, which can provide nonpolluting automobile systems are discussed. Four types of storage devices are identified: electro-chemical (batteries) hydrogen electro-mechanical (flywheels) Molten salt heat storage A high speed flywheel with a small permanent magnet motor/generator has more advantages than any of the other systems and might become a...

The squirrel-cage Induction motors (SCIMs) are approximately 80% of the overall electricity use in industrialized countries. In the agricultural and commercial sectors also, power consumption by high power SCIMs are quite substantial. On an average, the energy consumed by a motor during its life cycle is 40-80 times the initial cost of the motors. Therefore efficiency and power factor (PF) of t...

Electric motors have revolutionized the way of human living and resulted in the modern life style. In every product that one consumes or uses today or in any service field that one benefits, it is for sure that there is an electric motor contributing to the production. These motors are playing important role in the industries called as horses of modern industry. Induction motors often operate i...

The squirrel-cage induction motor remains the workhorse of the petrochemical industry because of its versatility and ruggedness. However, it has its limitations, which if exceeded will cause premature failure of the stator, rotor, bearings or shaft. This paper is the final abridgement and update of six previous papers for the Petroleum and Chemical Industry Committee of the IEEE Industry Applic...