Electric Motor
VSD – Power supply connections and earthing
In accordance with accepted practice and the local, power is normally provided to a VSD from a distribution board (DB) or a motor control center (MCC). Adequate arrangements should be made to provide safety isolation switches and short-circuit protection in… Read more
Apr 13, 2011 | By Edvard Csanyi
Electric Motor
Induction machines – historical touch
Faraday discovered the electromagnetic induction law around 1831 and Maxwell formulated the laws of electricity (or Maxwell’s equations) around 1860. The knowledge was ripe for the invention of the induction machine which has two fathers: Galileo Ferraris (1885) and Nicola… Read more
Mar 15, 2011 | By Edvard Csanyi
Electric Motor
Operating Principle Of Three Phase Asynchronous Motors
The operating principle of an asynchronous motor involves creating an induced current in a conductor when the latter cuts off the lines of force in a magnetic field, hence the name “induction motor”. The combined action of the induced current… Read more
Feb 02, 2011 | By Edvard Csanyi
Electric Motor
Keeping Motor Windings Dry
Special provision should be made to protect motor windings which operate in a damp atmosphere or are subject to condensation of moisture when out of service for long periods. Motors located in galleries of dams are frequently subject to continual… Read more
Dec 14, 2010 | By Edvard Csanyi
