Where can I find an electric motor that will turn somewhere between 5000-10000 RMP with somewhere between 150-200 hp with 200-300 lbs of torque?
With a permanent magnet DC motor (like from a battery powered toy) this will work fine. An AC motor is less likely to work, in normal operation the magnetic field that makes an AC motor work is produced by the electricity going into it, so if no power is going into it there is no magnetic filed to make it act as a generator, actually there might be a little stray magnetism or there are methods of getting it started with a pulse of external power, but the PM DC motor will be easiest . In short,yes you can use a motor for a generator but not just any motor
You are going to have a problem with that RPM range. The mass of the rotor has to increase as the HP goes up. Usually the larger the motor the slower the RPM. 3750 is usually the max rpm for most electric motors below 2 HP. You can look at Baldor Electrics web site and see if anything exists even close to to what you are looking for. When you figure the power requirements for a electric motor a rule of thumb is 750 watts per horsepower. So at 200HP you are looking at 150,000 watts of power requirred. To get that kind of power you will need high voltage or high current. Ohm's law says Power = Current X Voltage. As most AC motors have a max rating of 480 VAC. You would have to have one heck of a power source. I don't know what you are going to do with this motor but it will be huge.
No idea where you could go to purchase one but the electric motors they run in Toyota hybrids would seem to meet the requirements you are looking for. Prius Electric Motor Motor typePermanent magnet AC synchronous motor Power output67 hp @ 1200-1540 rpm (50 kW @ 1200-1540 rpm) Torque295 lb.-ft. @ 0-1200 rpm (400 Nm @ 0-1200 rpm) Voltage 500V maximum500V maximum Highlander Electric Motor Function Drive front wheels, regeneration during brakingNANANAStandardStandard Motor type Permanent magnet motorNANANAStandardStandard Power output 165 hp (123 kW) @ 4500 rpmNANANAStandardStandard Maximum torque 247 lb.-ft. @ 0-1500 rpmNANANAStandardStandard Maximum voltage AC 650VNANANAStandardStandard
For AC motors, a standard 3-phase squirrel cage induction motor will do. These are common and cheap, they're the primary motor used for running compressors, pumps etc. For EV use, a very complicated controller is needed to convert DC battery power into AC for the motor. But this also gives electronic reverse, regenerative brakes, and a wide enough torque curve that you don't need a transmission at all.
