Hey! Yeah I don't want to do gas because of how loud they are, and the cost of keeping it running... Electric is a lot easier for me to use. I thought about buying other motors to use, but I need something that's powerful enough (at least 2HP), and has enough RPMs to meet up to the pump's standards for full capacity. Most the motors I've found that are close to this, go for no less than about $150, so I'm trying to work within a budget... The motor I have now can do what I need though. I was able to get a simple estimate of the rpm of the motor, and it was quite higher than the recommended rpms for the pump I need... So a variable speed controller would help me dial in the correct amout of rpms for the pump.Then why not just get a common "C" frame induction motor and mount you pump to it? Hydraulic pumps unless connected to a gas engine use a regulator to control pressure not motor speed. Even most every hydraulic piece of equipment, back hoes , dozers etc, keep the motor running at a constant governed speed and use a regulator. A log splitter is usually even used this way, full speed on the motor. C frame motors are on Craig's list all of the time, swimming pool pump motors, for next to nothing.
Gas engine powered log splitters can get away without the regulator because the motor isn't powerful enough to break the cylinder. Electric motors put out there highest power in "stall", so there is a real chance of breaking something when using electric powered hydraulics. Do some reading on the subject.
Electric is actually a lot better than gas, because it is more consistent with power and how it pumps fluid... Most forge presses are made of electric rather than gas, because of some other reasons (I honestly don't know them all) but it's just a lot more efficient. These ones just run off of gas so that you can use it when you're in the woods or camping, and don't have to use a Solar panel or something to run it. The cylinder usually doesn't break unless it's really old, or cheap Chinese equipment... Which, the log splitter I'm saving up for might have a cheap cylinder, but I do plan on replacing the cylinder for a better one; that's still compatible with the pump...
So, basically the setup is motor-pump-fluid-cylinder... The motor turns the pump, the pump pumps fluid from the tank, and the fluid is put into the cylinder to make it move... So, the setup I'm using doesn't rely on air pressure for the hydraulics; it's mostly just relying on the motor's speed, and how fast it pumps the fluid into the cylinder... Which is called GPMs (gallons per minute). So, depending on your pump and size of your cylinder, the GPMs determine how fast the hydraulics move... So if you had a 1GPM pump hooked up to let's say a 1700RPM motor, it's not going to move very quickly... And what you need is the hydraulics to move quicker to move the steel, before the steel gets cold... So if you had a 4GPM pump with a 4000RPM motor, it'll be a lot quicker... Or if you had a 4GPM pump, and let's say you wanted it a little slower so you have more control; you'd turn down the RPM of the motor to 3000RPM.... That'll help change how fast it pumps the fluid.
It's a lot to explain, but I've done quite a bit of research and had some teachers walk me through most of it. I might be missing some things, I don't think I did; but if so you can correct me on that.