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eng.hmk
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Join Date: Jan 2008
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AC Induction Motors Load Sharing

11/02/2013 8:29 AM

Dear all

is there any reference or standard for the optimum motor size for load sharing, which mean from cost and operation wise to make load sharing between motors it should be started from load requirement not less than ?? HP

i hope my question is clear

Thx
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Tornado
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#1

Re: AC Induction Motors Load Sharing

11/02/2013 1:08 PM

No.

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bigg
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#2

Re: AC Induction Motors Load Sharing

11/02/2013 1:58 PM

Load sharing?
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lyn
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#3

Re: AC Induction Motors Load Sharing

11/02/2013 9:40 PM

Don't start them at the same time.
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7anoter4
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#4

Re: AC Induction Motors Load Sharing

11/03/2013 4:53 AM

If you would intend to put two motor of different characteristics on the same axe in order to drive a certain load then you could have such a problem. The correct load of the motor-less losses =high efficiency ,less reactive power=elevated power factor will be from 3/4 to full rated load of the motor. A suitable standard could be IEC60034-30 or NEMA MG1-or else, of course.

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lyn
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#5
In reply to #4

Re: AC Induction Motors Load Sharing

11/03/2013 6:36 AM

Let's hope OP is smarter than that.
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TonyS
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#6
In reply to #5

Re: AC Induction Motors Load Sharing

11/03/2013 7:44 PM

Highly unlikely!

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eng.hmk
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#7
In reply to #4

Re: AC Induction Motors Load Sharing

11/05/2013 6:03 PM

Thx a lot, but if two identical motor is used, do you think what's motor size should be cost effective, for example use two 100HP motors instead of 200 HP one

is there any standard to guide me what is the size of motors to be replaced by two or more motors in order to achieve load sharing advantages

Regards
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Tornado
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#8
In reply to #7

Re: AC Induction Motors Load Sharing

11/05/2013 6:11 PM

No.

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bigg
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#9
In reply to #7

Re: AC Induction Motors Load Sharing

11/05/2013 6:50 PM

Why? What are you trying to accomplish? You haven't even stated the load or load characteristics which might suggest doing this.
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