Alternator

[Hazzard]

Any idea where I can find a nearly new/refurbed 35/40 kva alternator to fit on to an engine?

 

[davidroberts30]

3 phase??
find a motor and run it

 

[Dave W]

Unless you've a reason to want to mess I doubt you'll do it cheaper than just buying a complete generator.

 

[TripleSix]

Any idea where I can find a nearly new/refurbed 35/40 kva alternator to fit on to an engine?

https://m.europages.co.uk/SHROPSHIRE-REWIND-SERVICES/00000004145545-001.html

https://gb.kompass.com/c/telford-rewinds-ltd/gb92028933/

 

[Pheasant Surprise]

Any idea where I can find a nearly new/refurbed 35/40 kva alternator to fit on to an engine?

What engine have you got for it?

Don’t forget the engine will need to be setup to produce the required rated power at 1500rpm, so don’t go looking at rated power at 2600rpm for instance. For a 40 kVA set the engine needs to be producing around 20% more power than that @ 1500 rpm due to mechanical losses, and the ability to hold its revs steady and maintain close to 50Hz output when you load it (or unload it)...

Most sets have a governor setup with tight “droop” control so that the set maintains its regulation within 2 to 3% of 50Hz

Have a read of this article on speed droop for diesel set governors from Woodward. They know a thing or two about governor control.

Also this article about converting general purpose vehicle diesel engines for use on gensets.

Would agree with comments above - in general it’s going to be cheaper and easier to buy a ready made set with all the controls etc ready to go. But as a “development” project it could be interesting. Good luck.

 

[Hazzard]

What engine have you got for it?

Don’t forget the engine will need to be setup to produce the required rated power at 1500rpm, so don’t go looking at rated power at 2600rpm for instance. For a 40 kVA set the engine needs to be producing around 20% more power than that @ 1500 rpm due to mechanical losses, and the ability to hold its revs steady and maintain close to 50Hz output when you load it (or unload it)...

Most sets have a governor setup with tight “droop” control so that the set maintains its regulation within 2 to 3% of 50Hz

Have a read of this article on speed droop for diesel set governors from Woodward. They know a thing or two about governor control.

Also this article about converting general purpose vehicle diesel engines for use on gensets.

Would agree with comments above - in general it’s going to be cheaper and easier to buy a ready made set with all the controls etc ready to go. But as a “development” project it could be interesting. Good luck.

Thanks for comments, have it sorted now.

 

[Pheasant Surprise]

Thanks for comments, have it sorted now.

Nice chatting with you. Best of luck with it all

 

[Dave W]

Do we get to know what the project is?

 

[Hazzard]

Do we get to know what the project is?

Project is to marry an alternator to a gardner engine. Have now sourced the alternator and will work on it over the spring. Thanks for all comments.

 

[Right-arm fast]

What engine have you got for it?

Don’t forget the engine will need to be setup to produce the required rated power at 1500rpm, so don’t go looking at rated power at 2600rpm for instance. For a 40 kVA set the engine needs to be producing around 20% more power than that @ 1500 rpm due to mechanical losses, and the ability to hold its revs steady and maintain close to 50Hz output when you load it (or unload it)...

Most sets have a governor setup with tight “droop” control so that the set maintains its regulation within 2 to 3% of 50Hz

Have a read of this article on speed droop for diesel set governors from Woodward. They know a thing or two about governor control.

Also this article about converting general purpose vehicle diesel engines for use on gensets.

Would agree with comments above - in general it’s going to be cheaper and easier to buy a ready made set with all the controls etc ready to go. But as a “development” project it could be interesting. Good luck.

Called Isochronous governors, or something like that.

 

[Mursal]

AVR or Automatic Voltage Regulator, no?

 

[Pheasant Surprise]

AVR or Automatic Voltage Regulator, no?

AVR will control excitation on the alternator, hence voltage output. Frequency control is down to the driving machine to offer frequency stability, hence engine governor stability and droop control.