Matrix converter is a single-stage converter which directly connects a three-phase voltage source to a three-phase load without dc-link components. Therefore, any harmonic distortion and imbalance in input voltage directly reflect to the output of the converter. Recently, many researchers have made an effort to cope with this problem. In this paper, under distorted input voltage conditions, beh...

In the electrical machines, operated in railway traction drives, the growth of power density requires overproportional more heat to be discharged which leads to the need for more and more advanced cooling techniques. A novel optimization and evaluation approach for internal air cooled traction machines will be presented in this paper. It analyses and investigates the thermo-aeroand thermodynami...

Introduction The increased use of ac and dc motor drives in industrial plants has elevated the power quality application considerations associated with power distribution systems. These considerations have sparked great controversy about the use of drives in industrial applications and have raised questions about their effects on an electrical system. Valuable guide standards, such as IEEE 519-...

Rotor magnets are critical components, which in case of fault, directly affect the performance drives based on permanent magnet synchronous motors. Thus, monitoring rotor status is essential to ensure both high level efficiency and service continuity. The present study focuses investigation a new full-time domain-based method for diagnosis incipient demagnetization vector-controlled asymmetrica...

The efficiency of induction motor drives under variable operating conditions can be improved by predicting the optimum flux that guarantees loss minimization. In this research, a loss-minimization scalar controller, based on determining of modulation index of IGBT inverter-based AC-to-AC converter, which corresponds to optimum flux, is proposed. For this purpose, mathematical models for total p...

AC machines are applied in actuator systems for many applications. The development of fast processors open up the possibilities to apply new techniques for identification and control of electrical drives in real-time, so as to improve and optimize their performances. The paper presents a systematic approach to identify the physically relevant parameters of an ac machine. Special attention is pa...

Adjustable Speed AC Drive (ASD) manufacturer’s recently migrated from Bipolar Junction Transistor (BJT) semiconductors to Insulated Gate Bipolar Transistors (IGBTs) as the preferred output switching device. The advantage of IGBTs is that device rise / fall time switching capability is 510 times faster, resulting in lower device switching losses, a more efficient and smaller drive package. Howev...

The virtual instrumentation (Vl) concept has been applied to ac and dc type electric drives. The Visual Designer is used for a dc motor and the LabView is used for a three-phase, delta connected induction motor. The essential parameters such as the line current, phase voltage, torque and speed are monitored continuously while the machines are operating on load. The data obtained from the drive ...