How can I obtain 30kW output from a alternator ?

Question

I am trying to get 30 kW from the engine of the vehicle to drive a much more efficient generator than what I have now. 10 kW is the highest practical output from low voltage, belt driven alternators. So, I need to get higher voltages and more power.

Answer 1

have a gear box a long one to go to where the alternator

Answer 2

You cannot make more power than it takes to produce the power when working with mechanical energy if we could gas wouldn't be 5 dollars a gallon.

Answer 3

Best, most flexible method is to use toothed belts. They are using such belts in 250HP reducers, so definitely possible. If you hate belts, you could also consider chains.

Most accessable place is generally to replace the timing pulley on the crankshaft with a longer pulley than original, and which includes cogged pulley for the new belt. Another option is to run an additional, beefier belt where the accessory belt is.

Aramid reinforced belts are fairly strong; I expect steel reinforced would be better, but steel reinforced timing belts are hard to find, even rare.

If you use chain, you could again consider the front of the engines. Failing that, gears could be used. Either really need to be protected from exterior dirt.

PTO's are available on transmissions of some trucks, but tough to fit in most vehicles.

Similarly, you could try to take off power from the drive chain somewhere, but difficult to access. Farm tractors and construction equipment often have PTO's, but from your question, I gather you want to put it on multiple vehicles.

Answer 4

you can add more alternators, each with it's own battery and regulator, and run them from a separate belt from the engine, but that takes a lot of engineering.

Is this one of those so called "HHO generators"?

Stop wasting your time, these are out and out scams.

You can never get out as much power as you put in. You are looking for 30 kW, which is equivalent to 40 HP.  When you get done generating the H2 and O2 (not HHO) and burning them in the engine, you will be lucky if you get 10 or 15 HP. So you used up 40 HP to produce 15 HP.

This is such an obvious scam that it's funny.

edit. sorry, I have been seeing these HHO scams at the rate of 5 per day!

direct take off is complicated. I was going to say you need to up the speed to match the alternator/generator, but actually you can design a generator to run from any speed. But you will need a higher voltage battery to match the higher voltage from the generator, to supply power when the motor is off, and to smooth out the variations in voltage from the generator.