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Which is better to chose an engine with 2900 rpm or 1400 rpm to reach the speed of 2 thousand rpm through an inverter?

It is a3-Phase AC motor for driving a heavy duty machine through an already existing gearbox.

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Question added by Feras Kraidy , Maintenance Manager , Taiba for Food Industry
Date Posted: 2014/05/19
Joby Mathew
by Joby Mathew , Instrumentation Engineer , Trinity Enterprises Ltd, India

1400 Rpm is always overloaded and will no longer run the machine .So it is always choose an engine with more capability,say2900 rpm

Nur Rohman
by Nur Rohman , Electrical Foreman - PT. Jasapower Indonesia , ADARO Group

It is better to choose an engine with2900rpm and give speed reference (2000/2900) x maximum frequency of the engine (Hz) into the inverter.

If you choose an engine with1400rpm, you must give speed reference (2000/1400) x maximum frequency of the engine (Hz) into the inverter. Its mean increasing working voltage above the engine's ability that causing an overvoltage and the engine will be overheated.

Vivek Kumar Gupta
by Vivek Kumar Gupta , Senior Electrical Engineer , siemens

You should go ahead with2900 RPM machine because AC inverters when opeates beyond the base frequency their performance detoriates.

Where as a2900 rpm machine will give you perfect flexibilty to operate at2000 RPM.

Deleted user
by Deleted user

2900rpm would fit the best.

Deleted user
by Deleted user

The better use2900 rpm. Because the speed is under full load speed thats mean the engine can work for longe days. If u use1400 rpm maybe can gave2000 rpm but in over load speed. the enginr fall down after few minutes

Denver Siazon
by Denver Siazon , Electrician , Asmael General Contracting

its better use2900rpm

Mihai Vezeteu
by Mihai Vezeteu , Site manager maintenance , METAV SA

an engine with2900 rpm

mohamed eliwa
by mohamed eliwa , instrument and control engineer , egyptian maintenance company 'emc'

Using2900 rpm is the answer

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