**Contents**show

Multiply the motor voltage by the full-load current. The result is in watts. Divide watts by 1,000 to give kilowatts. For example, 230 volts x 20 amps = 4,600 watts; 4,600 watts divided by 1000 = 4.6 kilowatts.

## How do you find motor rating without nameplate?

Use a strobe tachometer to determine motor RPM and then set up a generic motor in the database for that RPM. If loading cannot be provided by the operator use the acquired data and RPM to approximate loading. You can view the power factor for a value around 88 to 92 to approximate full load.

## What are the basic ratings of a motor?

For an electric motor, one horsepower is equivalent to 746 watts of electrical power and is the standard rating in the United States. In Europe, the kilowatt rating of a motor has become standard. 1HP = 746 watts. A motor of 100HP will produce 74.6kW of electrical power.

## How do I know what type of AC motor I have?

Look for the stator core construction and rotor. If there is no commutator, then it is a AC motor. If there is a commutator and brushes, it may be either a DC motor or an AC commutator motor (Universal motor).

## How do you find the horsepower of an engine?

The quickest method to closely estimate motor horsepower is to use a digital clamp meter to measure current and voltage to the motor, and then perform a simple calculation. Use this formula to estimate motor horsepower. Horsepower(hp)= Voltage x Amperage x % EFF x power factor x 1.73/746.

## How do you read a motor rating plate?

The RPM listed on the nameplate is the shaft speed for the motor. The speed of the motor is directly related to the frequency of the line voltage and the number of poles in the motor. At 60 Hz, a 4 pole motor will rotate at approximately 1800 RPM (7200/4 poles).

## How do you determine the efficiency of a motor?

Electric power is measured using the input current and voltage waveforms. Upon obtaining torque and speed estimates, the mechanical power (or load) is computed using torque times speed. The motor efficiency is computed by dividing the estimated mechanical power by the measured electric power.

## What is motor rated current?

The current drawn by a motor at its full load, calculated using formula is known as the rated current. Motor windings are designed to carry the rated current during normal operations and slightly higher than it for shorter duration.

## How do I know what pole My motor is?

To determine the number of poles, you can read the data plate directly or calculate it from the RPM stated on the data plate or you can count the coils and divide by 3 (poles per phase) or by 6 (pairs of poles per phase).

## What are the three types of motors?

The types of Electric motors are available in three main segments like AC motor, DC motor, & special purpose motors.

## How can you tell the difference between AC and DC motors?

Key Differences Between AC and DC Motor

AC Motor | DC Motor |
---|---|

An electrical machine that converts AC electrical energy into mechanical energy. | An electrical machine that converts DC electrical energy into Mechanical energy. |

It is powered by alternating current (AC). | It is powered by a unidirectional direct current (DC). |

## How is BHP calculated?

Formula for calculations of Break horsepower is

- BHP = (Torque × RPM )/5252,where torque is lb -ft and n = revolution per min.
- BHP = BP /33000,where BP (in watt ) = Torque×2π×RPM (RPM in min. ) Where torque in the formula of BP is in lb -ft.
- BHP =BP (in Watt ) / 746 we get it in horse power ,since 1 HP = 746 watt.

## How much horsepower is a 1000cc?

1000cc Motorcycles:

For 2-cylinder engines, expect to get about 80 to 100 HP. However, a 4-cylinder engine can get up to 180 to 320 HP for some ultra-fast acceleration.