An AC chopper controller with symmetrical Pulse-Width Modulation (PWM) is proposed to achieve better performance for a single-phase induction motor compared to phase-angle control line-commutated voltage controllers and integral-cycle control of thyristors. Forced commutated device IGBT controlled by a microcontroller was used in the AC chopper which has the advantages of simplicity, ability to...

Abstract This paper focuses on a topic frequently involved in the dynamics of transient phenomena rotary machines driven by an AC induction motor supplied three-phase four-wire electrical system: free response dynamic system mirrored torsional vibrations its rotor. is reducible at single degree freedom system, equivalent spring-mass-damper but as vibratory composed rotor (having moment inertia)...

In this paper, a comparative study of modified phase-angle, extinction-angle, and pulse width modulation control techniques for the purpose of power factor improvement of single-phase AC-AC voltage regulators have been illustrated as applied to a singlephase ac voltage converter by an example of the widely used single-phase induction motor as a dynamic load. Observations on power factor, displa...

The objective is to supply a three phase motors from a single phase AC mains. It is common to have only a single phase power grid in residential, commercial, manufacturing and mainly in rural areas, while adjustable speed drives may require a three phase power grid. Hence we need to convert from single phase to three phase supply to operate the drive system. Parallel converters can be used to i...

The aim of this paper is to review the origin and developments of Direct Torque Control (DTC), an advanced control technique of induction motor drives yielding superior performance. The direct torque control is one of the excellent control strategies available for torque control of induction machine. It is considered as an alternative to Field Oriented Control (FOC) technique. The DTC is charac...

Induction motors are the most widely used for appliances, industrial control, and automation; however, many applications need variable speed operations. The rapid development of power electronics controllers in recent years has attracted the attention of researchers for making use of flexible characteristics of an induction motor in variable frequency drives. It presents a compact embedded fuzz...

Purpose – The aim of this paper is to optimize the capacitor value of a single phase open well submersible motor operating under extreme voltage conditions using fuzzy logic optimization technique and compared with no-load volt-ampere method. This is done by keeping the displacement angle (α) between main winding and auxiliary winding near 90, phase angle (φ) between the supply voltage and line...

Abstract Agriculture is a socially significant sector of the economy. The growth agricultural production contributes to stable development society. It necessary use new mechanisms driven by induction motors increase productivity. Three-phase are mainly used in electric drive machines. At same time, it advisable single-phase network supply power remote farms. In this regard, using three-phase be...

A boost Power Factor Correction (PFC) front end converter followed by a circulating current for the soft switching flows only through the auxiliary circuit and a In recent years, dc power supplies have been widely used in industrial Lr is delivered to the capacitor C1 via transformer T. iLr (t) decreases linearly. I believe that I understand how a starting capacitor is used with an induction mo...