Hate to tell you this, you probably need to look for another motor for anything very useful if that's what you want.
This might make a toy type, light some little bulbs or run a computer fan slow, etc.. if you add magnets and blades. Might be fun to play with, just don't expect much from it.
A permanant magnet DC motor will make power when spun. The magnets make the power.
A series wound DC motor won't, normally. It uses DC power for both the fields and armature. No magnets.
Most AC motors do not make any power when spun. Sometimes there may be a little left over magnetic field from last time it was ran so it could accidently make a tiny amount of power temporarily, nothing good.
Looks like what you have there near as I can see is a 2 pole motor. High speed motor, that pretty much means it will have to spin at high speed to make power even if you added magnets to convert it. You could take out the armature, cut it down, add magnets, and it will make some power, but the power you'll get probably won't be much, low volts, low amps, and the speed it will need to turn is way too high.
Like I said, might light small bulbs or run a tiny fan slow, perhaps charge little batteries like Ni-cads or such at a few volts. I don't think you'll get up to 12V with it though.
Use the VAC setting for testing volts AC, and VDC setting for testing volts DC.
On my meters the lowest VAC setting is the correct one, 20 On the VDC is up to 20Volts I think and after 20Vdc meter just shows a 1 error the next up setting I think is 200 and will show higher DC volts. Don't have the meter handy to look at.
A PM DC motor (permanant magnet) can put out either AC or DC volts I think based on type of motor. A brush type motor will normally put out DC volts, and if you spin it one way the red wire is positive, Spin the other way the Black wire is positive.
A brushless DC motor can put out AC Volts, alernating currant, and you have to convert that to DC if you want DC.
An AC motor does not make power, but if you add magents to the amarture you've built an alternator and will get AC power, if you want DC you have to convert that.
To convert AC to DC the most popular way is with a bridge rectifier. Just connect the ouput wires from the motor to the AC inputs, and the corner thats cut off is the Positive terminal and diaganol acrossed is the negative terminal, those 2 give you the dc ouput. The other 2 were the AC inputs.
If you look for another motor, you probably want high volt, high amps, low rpm, for the motor ratings. Be sure the RPMs are for the motor, not for some output shaft after a gear reduction box. If you see a treadmill being tossed out for junk, grab it if electric! It may have PM DC motor ready to use. I see treadmills tossed out often for garbage pickup, free motors, always when I am in a rush and no time to stop and get the motor of course!
