Q:will an ac motor (air pump motor) generate electricity if turned manualy?

Yes, take the output from the slip rings.

Q:Can current transmitter and VFD be used for the same motor?

What is a current transmitter?

Q:Is servo motor AC motor? What's the difference? How can I tell whether it is AC or DC?

The typical difference is that:AC servo motor wiring is three-phase power line, as well as encoder feedback line.AC servo motor is without carbon brush, DC servo motor has carbon brush.

Q:This is crazy but since i work under someone else i have no choice but to ask for help. My boss has a 3450 RPM, 60 cycle, 1 phase, 115/230 volts, 12.4/6.2 amps. Here's what we need to do other than buying a different motor. A pig will be roasted under a BBQ pit. I need to use this power-full motor and add some kind of extra belts to pulleys or something like that. We need to make this pig rotate at a much and i mean much slower rate so i cooks nice and thoroughly. My dead line is 6/26/09 If anyone has any brilliant ideas plz help.

The motor you are describing is a synchronous motor; the speed cannot be changed easily. Variable frequency as suggested $$$$ can do for a bit, maybe 20% So you are stuck with the gear thing, I would suggest that you get a few BBQ motors at a local store because it has all the gearing. A few, because they may not last for the entire job depending on how well balanced is the load (the pig) If the load is well balanced, meaning that the effort is constant throughout the revolution then the BBQ motor will do fine. If the motor has to break the rotation in some portion and supply enormous torque in other portions it will die on the job I hope this answers your question

Q:Im wondering how many Volts/Amperes a regular small electric motor can handle.

Hello, Is it a DC or an AC motor? I am more familiar with DC motors, but AC motors have a few similarities. An electric motor draws very little current at no-load, so even if it's not designed for a given voltage, it may run just fine (and very fast) if you give it too much voltage. Usually DC motors are designed for 12 volts (16 volts max, typically). But they can usually handle 50 volts if there is no load. Of course, if the motor is going way too fast, it may fall apart - the copper windings will fly off the core and the motor will die. If you load the motor , the current increases rapidly. If the motor is stalled (energy applied, but the motor is physically clamped or restrained, it will draw maximum current and will eventually burn up, or if the motor has an internal circuit breaker, it will trip to protect it. A typical automotive DC motor can handle anywhere from 10 amps to 40 amps at 13 volts. If you let the motor run at no load, or a very light load, it can run indefinitely and will never overheat. However, AC motors are a different animal, and can be rated for either 120 volts or 240, or 460. There are way too many variables if you're talking about an AC motor. They are MUCH more dangerous than a DC motor also. If you disassemble any motor, be very careful. Even if you unplug an AC motor, there may be large capacitors inside it which can hold a potent charge and zap you if you touch the wrong thing

Q:If i spin a ac electric motor backwards will it produce electricity?

No, it won't.

Q:what are the typical dimensions of a 100 hp ac motor?

For a 3-phase motor, maybe about the size of a 2-drawer filing cabinet.

Q:Does anyone know of any websites to do this? I have an old 110v AC motor from an old vacuum.

You try to modified the rotor as a permanent magnet rotor connect a suitable bridge diodes in out put winding get the DC..Best of luck .Other method you have to modified with extra winding with excitation may not suitable expensive..

Q:Voltage required, amperage required, watts required (yes I know watts is voltage multiplied by amperage) and just as many specifications as possible. I plan to spin an alternator or two and ramp up the to the requirements with a class B amplifier. I would also like feedback to see if this is possible

The DIY electric car community has been active for some years now, There should be quite a few active sites by now. In the early days, DC motors were prevalent, now just as in the Locomotive field, AC has taken over. DC motors and PM AC often posses full torque at zero rpm. There were some designs that used a motor on each wheel, along the lines of Locomotive practice. These usually require the addition of wheel slip detection, however. A little like the traction control used on current autos.

Q:When more poles are added to an AC synchronous motor, the speed is decreased according to:RPM = 120 x f / n where n is the (even) number of poles and f is the frequency in Hz.I can find plenty of sources stating this effect, but nowhere can I find an explanation on why (ie: the physical mechanism), explicitly anyways, the number of poles slows down the speed. Also, where the 120 constant derived from and what are it's units (or is it non-dimensional)?Thanks

basically it is because you only rotate the amount the poles are separated for each cycle. double the poles, you rotate 1/2 has slow. the motor will run smoother, though.