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Archive: Category «Electric Motor»

Electric Motor

5 steps to choose the best motor for your application

For line-operated motors, loads fall into three general categories: constant torque, torque that changes abruptly, and torque that change gradually over time. Bulk material conveyors, extruders, positive displacement pumps, and… Read more

Dec 03, 2011 | By Edvard Csanyi

Few steps you should know before choosing best motor for your application
Electric Motor

Why do we need variable speed drives (VSD)?

There are many and diverse reasons for using variable speed drives. Some applications, such as paper making machines, cannot run without them while others, such as centrifugal pumps, can benefit… Read more

Nov 25, 2011 | By Edvard Csanyi

Danfoss - VLT AutomationDrive Series
Electric Motor

Motors And Drives For Efficient Control – ABB

With electric motors accounting for an estimated 65 percent of industrial energy use, any increases in efficiency clearly provide the potential for major savings. The energy consumption of electric motors… Read more

Nov 23, 2011 | By Edvard Csanyi

ABB Motors and Drives
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 Csanyi

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 Csanyi

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 Csanyi

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 Csanyi

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 Csanyi

AC motor stator windings

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