Electric motors and drives

Electric Motors and Drives This Page Intentionally Left Blank Electric Motors and Drives

Electric Motors and Drives in Torsional Vibration Analysis and Design

Two types of prime movers are continuously applied for rotating machinery: mechanical and electric drives. This tutorial focuses on electric drives, which are actually composed of separate components: electric motor, frequency converter (optional), and electric network including transformers. The main aim of this tutorial is to explain the phenomena of electric drives related to the torsional v...

Reference frames for simulation of electric motors and drives

Simulations of AC electric machines are usually performed in a coordinate system, or reference frame, with two axes (often denoted by d and q, or represented as a complex space vector). A third axis, the zero-sequence axis, is a homopolar axis that is necessary for handling certain unbalanced conditions. Historically, the transformation was essential to getting reasonable results, since computa...

Fuzzy Logic Control of Electric Motors and Motor Drives: Feasibility Study

Electric motors use 60% of the electrical energy generated in the U.S. An improvement of 1% in all electric motors’ operating efficiency could result in reduced coal combustion of 6.5 to 10 million tons* per year. New techniques are required to extract the ultimate performance from modern motors. This study examined the feasibility of Fuzzy Logic Motor Control (FLMC). The investigation included...

Selection of Servo Motors and Drives

The choice of motor and drive as well as mechanical transducer is a very important step in servo system design, because non-optimal selection leads to poor system performance and increased installation and maintenance costs. It is still an iterative process with skill in choice dependant on obtaining correct specifications and safety margins. Fundamental principles and procedures in selecting p...