High Power VSDS motor (Urgent)
High Power VSDS motor (Urgent)
(OP)
Hi,
I need to size an Electric Motor (VSDS type) to drive centrifugal compressor. Required power at motor shaft is about 27 MW. Gearbox will be included between motor and compressor.
Is it better to go for 2 poles or 4 poles for this range of power as per referenced applications ?
It seems the available Voltage is 6.6 kV on site.
Thanks in advance for your feedback
Best regards
Wimple
I need to size an Electric Motor (VSDS type) to drive centrifugal compressor. Required power at motor shaft is about 27 MW. Gearbox will be included between motor and compressor.
Is it better to go for 2 poles or 4 poles for this range of power as per referenced applications ?
It seems the available Voltage is 6.6 kV on site.
Thanks in advance for your feedback
Best regards
Wimple





RE: High Power VSDS motor (Urgent)
Thanks
RE: High Power VSDS motor (Urgent)
Acronym Definition
VSDS Vermont State Dental Society
VSDS Variable Speed Drive System
VSDS Video Symbology Display System
VSDS Velocity Selection by Doppler Shift
So ASS-u-Me-ing Variable Speed Drive System then, is the 60 - 105% referring to Speed? Current? Torque? Flow? Tribbles?
Is your gear ratio 1:1, 2:1, 3:1, 300:1, 3,000,000:1?
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RE: High Power VSDS motor (Urgent)
> VSDS Vermont State Dental Society
what relation with electric motor to drive Compressor??
> VSDS Video Symbology Display System
what relation with electric motor to drive Compressor??
>VSDS Velocity Selection by Doppler Shift
what relation with electric motor to drive Compressor??
where do we are here?
RE: High Power VSDS motor (Urgent)
"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln
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RE: High Power VSDS motor (Urgent)
By the way, what are the Pros/Cons to have this motor with two driving end shaft?
Rgds
RE: High Power VSDS motor (Urgent)
On the other issue, are you saying that someone is specifying a motor with 2 drive shafts, one on each end? Typically that is done when you have two mechanical driven units, twin cage blowers are the most common thing that comes to my mind. But I've seen it done with centrifugal compressors in combined cycle applications where they have the compressor on one side and a turbine on the other, so I suppose that means it can be done with 2 compressors.
As to 2 pole or 4 pole, that is one for the mechanical side of the equation. A 2 pole motor of the same MW output will put out less shaft torque. So the role of the gearbox will be a determining factor.
"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies
RE: High Power VSDS motor (Urgent)
Just as an aside PWM is Pulse Width Modulation which describes the type of Variable Speed Drive (VSD)also refered to as a VFD Variable Frequency Drive.
RE: High Power VSDS motor (Urgent)
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If we learn from our mistakes I'm getting a great education!
RE: High Power VSDS motor (Urgent)
You should also be able to get some help from motor suppliers.
"Theory is when you know all and nothing works. Practice is when all works and nobody knows why. In this case we have put together theory and practice: nothing works... and nobody knows why! (Albert Einstein)
RE: High Power VSDS motor (Urgent)
I agree with dpc. Ask by all means but with an application rated 27MW, I'd be wanting to know a little more information than you have provided.
RE: High Power VSDS motor (Urgent)
Thks for feedback
jaref,
QUOTED /
As to 2 pole or 4 pole, that is one for the mechanical side of the equation. A 2 pole motor of the same MW output will put out less shaft torque. So the role of the gearbox will be a determining factor.
UNQUOTED/
here it is mechanical drive application. What do you mean by the role of the gearbox?
Thks
Rgds
Wimple
RE: High Power VSDS motor (Urgent)
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If we learn from our mistakes I'm getting a great education!