Normally you would specify a motor to do a particular job by the mechanical power output you require.
A motor takes electrical power "in" and produces mechanical power "out".
Read whatever it says on the motor's rating plate or user-guide.
The mechanical energy output of a motor is measured in various units around the world: for example in watts, horsepower (or brake horsepower).
Another answer
The above answer is quite correct in stating that a motor's output power is its rated power as it's a guide to how much load it can drive.
Power is simply a rate - the rate of transfer of energy. The horsepower is the Imperial unit of power, whereas the watt is the SI unit of power. In the US the output power of a motor is typically still measured in horsepower whereas in Europe the use of horsepower is almost obsolete, except for small "fractional horsepower" electric motors, and both the input power and the output power of a motor are measured in watts or, more likely, kilowatts.
amps - how much electrical output
Divide the output rating by the input rating
3 amps
A solenoid will never become an electrical generator. The two articles in the question are two different devices. A solenoid, is usually associated with an electrically operated valve. An electrical generator is used to produced a voltage output of a specific value and an amperage of a specific value. Combined amps and volts results in a wattage output. It is the wattage rating that generators are sized by.
The selection of overload protection for motors is taken from a table in the electrical code book. It is based on the full load current rating of the motor.
amps - how much electrical output
Motors are rated according to their output power, expressed in watts or kilowatts (or horsepower, in North America). This is because the motor's rating must be matched to the power requirements of its mechanical load.
The maximum current rating for the circuit breaker needed for a 60 amp electrical load is 60 amps.
"IE" stands for "International Efficiency" and refers to the energy efficiency of electric motors. It is an indication of how efficiently the motor converts electrical energy into mechanical energy. Motors with a higher IE rating are more energy-efficient.
power various ,load changes,excitation problems,speed various
Its 50-0.7=49.3V Using this Formula : PIV Rating = Vout - 0.7V
A device that uses a 15 amp plug requires a standard electrical outlet with a 15 amp rating.
Divide the output rating by the input rating
The electrical appliance has a 10-3 amp rating.
The electrical appliance has a 10/3 amp rating.
The 6/3 amp rating for this electrical appliance is 2 amps.
Required Rating: 1Recommended Rating: 3.5Photo:http://thecrab.ning.com/photo/wow-rating?context=user