Hazzard
Member
- Location
- Shropshire
Any idea where I can find a nearly new/refurbed 35/40 kva alternator to fit on to an engine?
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?Any idea where I can find a nearly new/refurbed 35/40 kva alternator to fit on to an engine?
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.
Nice chatting with you. Best of luck with it allThanks for comments, have it sorted now.
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.Do we get to know what the project is?
Called Isochronous governors, or something like that.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.
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.AVR or Automatic Voltage Regulator, no?