Motor specs required for a generator.
Motor specs required for a generator.
(OP)
Hi,
I currently have a windblue dc 540 PMA that I would like to power using a motor. The reason for this is that I would like to determine the output of the generator to a battery at different speeds. I'm planning on using a pulley driven system to drive the generator from 0 to 2000RPMs with a drive pulley ratio of 1:2. I'm thinking I would need an AC motor and a speed controller to vary the speed. So the thing is I'm not quite certain what are the requirements for the motor to operate the generator. Any help would be greatly appreciate, thanks.
I currently have a windblue dc 540 PMA that I would like to power using a motor. The reason for this is that I would like to determine the output of the generator to a battery at different speeds. I'm planning on using a pulley driven system to drive the generator from 0 to 2000RPMs with a drive pulley ratio of 1:2. I'm thinking I would need an AC motor and a speed controller to vary the speed. So the thing is I'm not quite certain what are the requirements for the motor to operate the generator. Any help would be greatly appreciate, thanks.





RE: Motor specs required for a generator.
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
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RE: Motor specs required for a generator.
A small battery will take more current than a large battery. A dead battery will take more current than a charged battery.
Try a 1/4 HP or 1/3 HP three phase motor and a VFD suitable for single phase input. If you find a 200 Volt or 208 Volt rated motor at 1760 RPM the VFD will be able to drive it to 2000 RPM.
Try different sized batteries at different states of charge.
Bill
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"Why not the best?"
Jimmy Carter
RE: Motor specs required for a generator.
RE: Motor specs required for a generator.
I would just go get a good quality variable speed drill motor and be done with it, at least it's good for something else afterward.
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies
RE: Motor specs required for a generator.
RE: Motor specs required for a generator.
For a motor to act as generator it should outputs about 1.2 the rate power at when it is driven at 1.07 (107 percents) the synchronous RPM.
FYI: There are many efforts to lower its synchronous RPM using VFD (variable frequency drive) let's say to 100RPM . . . . and . . .then using the prime force (wind turbine) to drive it to 107 RPM (107%)- Theoretically it should act as generator, but somehow it does not work that way. For centuries it stay as a challenge for the community to find the way to operate a motor in generator mode at low speed. You may take a look at: http://
Good luck!