double-cage induction motors behavior under flicker conditions

Double-Cage Induction motors behavior under Flicker Conditions

Global Observability Analysis of Induction Motors under Sensorless Conditions

The problem of achieving high performance from induction motor based drives without sensing mechanical variables, i.e. high performance sensorless control is a widely studied topic, specially in the last decade. Several works point out some operating regimes where reliable control and speed estimation fail. However, a complete understanding of the nature of these limitations does not exist due ...

A Novel Equivalent Circuit for Induction Motors under Voltage Fluctuation Conditions

Voltage fluctuation is one of the important types of power quality aspects originated from heavy fluctuating loads. This phenomenon can influence the behavior of induction motors, produce excessive vibration and increase the ohmic losses. In this paper a simplified model to evaluate the electrical characteristics of three phase induction motors under voltage fluctuation conditions will be prese...

Prediction of Thermal Condition of Cage-rotor Induction Motors under Non-standard Supply Systems

A hybrid thermal model for accurate estimation of thermal condition of cagerotor induction motors under non-standard supply systems has been presented. The developed thermal model is a combination of lumped and distributed thermal parameters which are available from motor dimensions and other physical constants. The thermal condition of the motor under non-standard supply systems such as unbala...

Electromechanical interaction in rotordynamics of cage induction motors

Electromagnetic fields in the air gap of an electric machine produce electromagnetic forces between the rotor and stator. The total force exerted on the rotor due to the eccentric rotor position is called the unbalanced magnetic pull. This eccentricity force is directed roughly over the shortest air gap. At low frequencies, the vibration amplitudes of flexural modes may be large enough to coupl...

Dynamical models for fault detection in squirrel cage induction motors

Abstract: Induction motors are the dominant components in industrial processes involving electromechanical energy conversion. Safety, reliability and efficiency are major concerns in modern induction motor applications. Since detecting faults on time could avoid costly unscheduled shutdowns, in recent years there has been an increased interest in induction motor fault detection and diagnosis. I...