All About Electric Motors machinery Controls links tutorials

Handbook of Small Electric Motors free ebook - I Found this site full of free ebook on electrical machinary


Electric Motor Controls
understanding the many various control devices available and their uses and limitations becomes an important part related to reliable operation and protection of the motor and the personnel using the motor.Certain pieces of motor control equipment can accomplish multiple functions from each of the topics or categories.


Instrumentation And Control
Tutorials on Electric Actuators. Electrically actuated system are very widely used in control systems because they are easy to interface with the control systems which are also elecric and because electricity is easily available unlike fluid power which require pumps and compressors.


The Three Phase Induction Motor
Thomas Edison He invented the incandescent lamp in 1879 and began immediately to develop a power generating and distribution system to promote it. His first power plant opened in new York City in 1882 and several others were built over the next few years. Most of the power generated by Edison’s plants went to lighting customers; however, DC motors were in use in industry by the 1880’s. Although Edison’s efforts were a limited financial success, it was soon recognized that DC systems suffered heavy power losses in transmissions over any distance.


A Brief Tutorial On Machine Vibration
These benign vibrations are characteristic of regular operation of a machine doing what it is supposed to do. The amplitudes will vary from machine to machine and are a measure of the quality of manufacturing and load condition. The presence of these benign vibrations at “normal” levels provides a comfortable feeling that the machine is still alive.


Motor Basics
Motors convert electrical energy to mechanical energy.Engines convert chemical energy to mechanical energy. Operating Principle, Motor Parts, Enclosure, Stator, Rotor, Wound Rotor Motors, Bearings, Other Parts,





All electric motors are governed by the laws of electromagnetism, and are subject to essentially the same constraints imposed by the materials copper and iron  from which they are made. We should therefore not be surprised to Wnd that at the fundamental level all motors – regardless of
type – have a great deal in common.  Although there are many diVerent types of converters, all except very low-power ones are based on some form of electronic switching. The need to adopt a switching strategy is emphasised in the Wrst example, where the consequences are explored in some depth. We will see that switching is essential in order to achieve high-eYciency power conversion, but that the resulting waveforms are inevitably less than ideal from the point of view of the motor.