Electro-hydraulic differential cylinder drives with variable-speed displacement units as their central transmission element are subject to an increasing focus in both industry and academia. A main reason is the potential for substantial efficiency increases due avoidance of throttling flows. Research contributions have mainly been focusing on appropriate compensation volume asymmetry developmen...

The power <span>electronic component has been widely used in the current industrial era. It considered more efficient than previous devices as it saves space and uses less power. One example of electronic components is variable speed drive for regulation electric motors world. Another application to be energy-saving lamps. use these two loads generates harmonic distortion reduces network ...

Almost all electricity in the UK is generated by rotating electrical generators, and approximately half of it is used to drive electrical motors. This means that efficiency improvements to electrical machines can have a very large impact on energy consumption. The key challenges to increased efficiency in systems driven by electrical machines lie in three areas: to extend the application of var...

In this paper, a new method is proposed for the speed control of a three-phase current forced synchronous machine drive. This metohd is based on the use of an approximate constant commutation safety margin angle in the output thyristor bridge of the drive system as well as on the compenastion of stator magnetization reaction. The commutation process in the output converter of the machine driv...

This paper shows a comparison simulation results for two controllers using the same name plate of 2750 KW, 6.6 KV, 50 HZ for wound and squirrel cage motors using two methods of controlling, the first method is achieved by a conventional method and the second method is achieved by a frequency inverter respectively. Keywords— Squirrel cage and slip ring motors, conventional and VSD controllers si...