Enter the power, voltage, current, and power factor into the calculator to determine the missing variable for an AC motor.
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AC Motor Power Formula
The following formula is used to calculate the power of an AC motor given the voltage, current, and power factor.
P = V * I * PF
Variables:
- P is the power in watts
- V is the voltage in volts
- I is the current in amps
- PF is the power factor (a unitless number between 0 and 1)
To calculate the power of an AC motor, multiply the voltage by the current and then by the power factor.
What is an AC Motor?
An AC motor is an electric motor driven by an alternating current (AC). The AC motor commonly consists of two basic parts: an outside stator having coils supplied with AC to produce a rotating magnetic field, and an inside rotor attached to the output shaft producing a second rotating magnetic field. The rotor magnetic field may be produced by permanent magnets, reluctance saliency, or DC or AC electrical windings.
How to Calculate AC Motor Power?
The following steps outline how to calculate the power of an AC motor.
- First, determine the voltage (V) supplied to the motor.
- Next, determine the current (I) flowing through the motor.
- Next, determine the power factor (PF) of the motor.
- Finally, calculate the power (P) using the formula P = V * I * PF.
- After inserting the values and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Voltage (V) = 230 Volts
Current (I) = 10 Amps
Power Factor (PF) = 0.8