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Archive: Category «Electric Motor»

Electric Motor

Cooling and Ventilation of Electric Motors (IC)

All rotating electrical machines generate heat as a result of the electrical and mechanical losses inside the machine. Losses are high during starting or dynamic braking. Also, losses usually increase… Read more

Aug 08, 2011 | By Edvard

Cooling and ventilation of electric motors (IC)
Electric Motor

AC motors – Protection against short circuits

Every electric motor has operating limits. Overshooting these limits will eventually destroy it and the systems it drives, the immediate effect being operating shutdown and losses. A short circuit is… Read more

Jul 29, 2011 | By Edvard

GV2-L magnetic circuit breaker (Schneider Electric) and its graphic symbol
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… Read more

Apr 13, 2011 | By Edvard

VSD - Power supply connections and earthing
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… Read more

Mar 15, 2011 | By Edvard

Induction machines
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… Read more

Dec 14, 2010 | By Edvard

AC motor stator windings

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