Voltage fluctuation is one of the important types of power quality aspects originated from heavy fluctuating loads. This phenomenon can influence the behavior of induction motors, produce excessive vibration and increase the ohmic losses. In this paper a simplified model to evaluate the electrical characteristics of three phase induction motors under voltage fluctuation conditions will be prese...

Nowadays an economical and environment crisis is felt in the world due to the increasing fuel prices and high CO2 emissions. This crisis is mostly due to present the transportation system, which uses internal combustion engines. The development and integration of electrical motors with improved electromechanical characteristics, using high temperature superconductors, can provide a sustainable ...

Wavelet Transform is a mathematical tool for time frequency analysis of non stationary signals like the current waveform in electric traction system. The locomotives used in traction system have different types of traction motors –dc and three phase ac motors with different methods of speed control. Hence technologies will be different depending on the type of locomotives. The nature of the loa...

Ultrasonic motors have been expected as a leader of new actuators since 1980th when they were invented. Author has been conducted research on analysis of characteristics of ultrasonic motors, development of novel ultrasonic motors including multi-degree-of-freedom (DOF) ultrasonic motors, and application of ultrasonic motors for robotic field. In this paper, several results are described.

This paper presents a pet-type robot communication system for mental care of single-resident elderies. The robot can communicate with the people autonomously, and also it is Internet-accessible and so that allows the people to communicate with others, directly or using the communication server. The system consists of pettype robots and the information center. The pet-type robot can treat not on...

In electric motors, the use of rare-earth magnets has been increasing rapidly. A stronger magnet force enables motor’s higher performance, resulting in most high-performance motors generally using magnets. However, these have two crucial disadvantages: potential restrictions on supply magnetic materials and sharp fluctuation price. Thus, many recent researches focus developing reducing critical...

in the present study, field oriented control of step motor implementation has been analyzed sothat it can make a sensorless control. efficiency and facilities of step motor is more than othertypes of electromotor. therefore, the numbers of mechanisms and different types of turning canbe made into them. also controlling these motors is easier than other available motors. steppingmotor has been d...

The increasing of world population, forced human beings to produce clean energy, more creative solutions have been developed use the energy with most efficient way. Researches on this topic still working today. Nowadays, new electrical machines are invented and currently used ones being continue be improved. In industry, if a survey is made according electric motors, it will seen that, inductio...

electric motors are the largest consumer of world electric energy, consuming more than twice as much as lighting, the next largest consumer. electric motors account for between 43 and 46% of all global electricity consumption approximately. they give rise to about 6 040 mt of co2 emissions. end‐users approximately spend usd 565 billion per year on electricity [1]. in recent years, increase in e...