t is a common practice to use Direct Current motors in mechatronics devices due to possibilities for their fine and rapid control. Induction electrical motors, on the other hand, are rugged and robust, however, have been a challenge and conventional drives and control mechanisms are not ideal for their fine tuning and control. As such these excellent electrical engines may not be very popular i...

A coil-gun uses pulsed currents of large magnitude to propel ferrous projectiles at high speeds. The various problems associated with high currents and magnetic fields are discussed, as well as the components and design of my experimental coil-gun. I tested the coil-gun at various charge voltages and different projectile sizes, then calculated the efficiency of the coil-gun with measured values...

In a recent paper 3] Espinosa and Ortega presented an output feedback globally stable speed tracking controller for induction motors. An important feature of the scheme is that it does not require state observers, thus reducing the computational burden, a critical limiting factor in physical implementations. The performance of the scheme is limited by the fact that the convergence rate of the s...

In this paper we propose a multiobserver switching control strategy for fault tolerant control of induction motors. The strategy combines three current sensors and associated observers that estimate the rotor flux. The estimates provided by the observers are compared at each sampling time by a switching mechanism which selects the sensors–observer pair with the smallest error between the estima...

Induction motors (IMs) are commonly used in various industrial applications. A spectrum synch (SS) technique is proposed in this chapter for early IM defect detection using electric current signals; fault detection in this work will focus on defects in rolling element bearings and rotor bars, which together account for more than half of IM imperfections. In bearing fault detection, the proposed...

Abstract - Use of efficient signal processing tools (SPTs) to extract proper indices for fault detection in induction motors (IMs) is the essential part of any fault recognition procedure. The Part1 of the two parts paper focuses on Fourier-based techniques including fast Fourier transform and short time Fourier transform. In this paper, all utilized SPTs which have been employed for fault fete...

From a control viewpoint, DC motors must be maintained frequently due to their brushes and rectifiers. Sometimes the motor is installed in a location that makes it difficult or impossible to maintain or repair the motor. Compared to the disadvantages of DC motors, AC motors have a variety of advantages. for example, AC motors feature small size, light weight, low rotary inertia, and low price. ...

1. Sheikh MA, Bakhsh ST, Irfan M, Nor NBM, Nowakowski G. A Review to Diagnose Faults Related Three-Phase Industrial Induction Motors. J Fail. Anal. And Preven. 2022:1-12. https://doi.org/10.1007/s11668.... CrossRef Google Scholar

-As a result of the increasing use of electronic devices and other non-linear loads, the wave-forms of the electricity supply voltage are being distorted and inequalities are appearing between the phases. This deterioration is associated with problems of electromagnetic incompatibility and reductions in the efficiency of loads such as motors. This paper investigates the additional losses caused...