Alternator

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

Member
Location
Shropshire
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.
 
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.
 

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CHAP launches CropMonitor Pro a new digital service for predicting crop pest and disease risks

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CHAP launches CropMonitor Pro â a new digital service for predicting crop pest and disease risks

CHAP is delighted to announce the launch of a new digital service – Crop Monitor Pro. It is designed to help growers and agronomists predict the likelihood of pest and disease outbreaks on their farm.

CropMonitor Pro extends the DEFRA funded, long-standing regional risk evaluation service (Crop Monitor) which was first launched in 2003 by Fera Science Limited (Fera). CropMonitor Pro is a significant advancement on that service by providing field-level risk prediction for a range of pests and diseases affecting winter wheat, winter oilseed rape and...
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