Synchronous Motor

[Vaibhav111]

Where can i find 1500 Hp, 4kv Synchronous Motor Efficiency? I talked to siemens rep, he sent me induction motor's efficiency chart. When I asked him again about synchronous motor, he replied they do not make synchronous motors of this size. Pleas see if someone can help me..

Thanks,
Vaibhav

 

[hesselberth]

You might try contacting WEG Electric, they make motors this size.

 

[jraef]

Apparently Siemens doesn't make MV synchronous motors that small.

But efficiency in something that is built-to-order as these are will vary by design, speed, features etc. Usually you specify an efficiency you would like to see, then they tell you how much that will cost. In general though if you are just looking for an estimate, Synchronous motors tend to be more efficient than equivalent asynchronous motors, so if all you need is an estimate, using some data you can find on a SCIM will be a safe bet.


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[dpc]

Check with EM if you're looking in the US:

http://www.electricmachinery.com/majic/pageServer/1h030000hl/en/Synchronous-Motors.html

What is the speed?

 

[TurbineGen]

I seem to remember a Toshiba synchronous motor at the chemical plant where I used to work. It was 4000V, 2000 HP. Perhaps try them.

Why do you need a synchronous motor? Are you using it as a condenser?

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If it is broken, fix it. If it isn't broken, I'll soon fix that.

 

[Vaibhav111]

Speed would be 1800 RPM.

We require synchronous motor because of their higher efficiency which will help our client in reducing energy cost in long run.

 

[electricpete]

I agree with above comments - it's most productive to compare specific motors since there is variability.

Here was previous discussion of sync vs induction motors and their efficiency

http://www.eng-tips.com/viewthread.cfm?qid=135734

good link by GE. Comments about other things to consider (like complexity, reliability, maintainability... all weigh in on the side of induction motors imo).

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