By taking the voltage and multiplying it by the associated current, the power can be determined. A watt (W) is a unit of power defined as one Joule per second. For a DC source the calculation is simply the voltage times the current: W = V x A.

## What is the formula of motor?

Electric Motor Formula

TO FIND | DIRECT CURRENT | SINGLE PHASE |
---|---|---|

HORSE POWER | V x I x EFF 746 |
V x I x EFF x PF 746 |

CURRENT | P V x EFF | P V x EFF x PF |

EFFICIENCY | 746 x HP V x I | 746 x HP V x I x PF |

POWER FACTOR | —— | Input Watts V x I |

## What is the formula for calculating current?

Current is usually denoted by the symbol I. Ohm’s law relates the current flowing through a conductor to the voltage V and resistance R; that is, V = IR. An alternative statement of Ohm’s law is **I = V/R.**

## How do you calculate efficiency output?

The work efficiency formula is **efficiency = output / input**, and you can multiply the result by 100 to get work efficiency as a percentage.

## What is slip formula?

If the revolving magnetic flux’s synchronous speed & the speed of rotor are Ns & Nr in the motor, then the speed among them can be equivalent to (Ns – Nr). So, slip can be determined as. **S = (Ns – Nr) / Ns**.

## What is synchronous speed and it’s formula?

The synchronous speed of an AC motor is determined by the frequency of the source and the number of poles. The RPM is **calculated by multiplying the frequency times 60 and dividing by the number of pairs of poles**. Some motors are designed to operate at synchronous speed. …