Omar El-Sayed Mohammed Youssef
Asst. Professor
A New Method to Start Loaded Induction Motors
Journal of Engineering Research • 2024
Publication Information
Authors
Omar E. M. Youssef
Keywords
Induction motor; required acceleration rate; starting torque; starting current; variable-frequency drive
Journal
Journal of Engineering Research
Publisher
Arab Journals Platform
Volume
8
Issue
1
Pages
Not Available
publication.type
International
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
Three-phase induction motors have a widespread use in industry, and starting of loaded induction motors is an important matter. However, there are few studies on motor starting using variable-frequency drives (VFDs). The existing control schemes, described by these studies, have disadvantages such as dependence on derived characteristics, adjustment of settings, design of controllers, or burden of calculations on the control processor. In this paper, a simple and effective control scheme of VFDs to start loaded motors is proposed. In this scheme, there is no dependence on any characteristic, adjustment of settings, controllers, and rotor speed sensor. By this scheme, the motor is controlled to give the required acceleration rate, provided that the maximum-torque limit is not violated. Also, this leads to keep the starting current at satisfactory values. The proposed scheme is appropriate when a high starting torque is required and /or when the starting is repeated many times per hour.
