I'm wanting to power a DC motor with a generator and I'm trying to figure out how if this gen will work.
Motor: At 144 VDC, 28.5 HP continuous, 30.4 HP for one hour, 48.8 HP for five min., 100 HP peak
One hour kW rating is 17.3kW@96VDC, 20.8kW@120VDC,22.9kW@144VDC
Generator: Continuous Output 20KW
Voltage 120/240
Current (Amps) 166/83
Poles 4
Phase Single Phase
Rotational Direction Clockwise or Counter Clockwise
Rotation Speed 1800 RPM
The Motor will be running continuously at an estimated 20-25HP with some variance in demand. There will be a 12 battery bank for the motor to pull from if demand exceeds the generator. Here are the specs of the battery;
Voltage: 12 V
AH: 42 AH
Terminal: B
Weight: 34 Lbs
If demand on the batteries are needed it wont last for more than a couple minutes at a time and shouldn't happen a lot. I'd like the gen to maintain the batteries after if/when they are needed also. Thanks
Answer:
Your motor is 28.5 HP.
Your generator is 20KW, which is 26.8 HP.
I see a problem here. You say the motor will be running continuously at 20-25 HP, but it's not just the motor, it's the control circuitry as well.
Equipment has a high failure rate when it's always running full bore. If it can loaf along at 70% or 80% of capacity, you'll see dramatically lower costs. I'd want a 30KW generator as a minimum - and I'd feel more comfortable with a 35KW or 40KW generator.
it sounds close,
but if the generator is UL rated, it has some extra ability built in to it,
I have run a UL listed generator (40KW) for 2 hours at 150%
and it was fine, and not really that hot either.
I bet it will be just fine, unless it will be running somewhere really hot, like phenox, AZ or fresno CA
if you have batteries, I would put a charge regulator in the circuit so that they can't overload your generator if the batteries have been discharged some and you still have your motor load,
either that or get a way bigger generator.
sorry I am not good at specific math.
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