# How do you calculate motor current?

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## How do you find the current of a motor?

Calculate the field current for the motor using the formula I = V/R where I is the field current. As an example, assume V is 40 volts and R is 500 ohms: I = 40/500 = 0.08 amps.

## How do you calculate amps on a motor?

How to Convert Horsepower to Amps

1. Amps = (Horsepower × 746) ÷ Efficiency ÷ Volts.
2. Watts = Horsepower × 746.
3. Watts = Wattsη
4. Amps = Watts ÷ Volts.
5. Amps = HP × 746V × η × PF.

## How do you calculate motor current from RPM?

It states that current through the conductor is directly proportional to applied voltage and is expressed as:

1. I = V / R. where I – current, measured in amperes (A); …
2. Pin = I * V. …
3. Pout = τ * ω …
4. ω = rpm * 2π / 60. …
5. E = Pout / Pin. …
6. Pout = Pin * E. …
7. τ * ω = I * V * E.
8. τ * rpm * 2π / 60 = I * V * E.

## How do you calculate motor current from KW?

AC three phase kilowatts to amps calculation formula

1. I = 1000 × P / (√3 × PF × VL-L )
2. amps = 1000 × kilowatts / (√3 × PF × volts)
3. A = 1000 × kW / (√3 × PF × V)
4. I = 1000 × 0.33kW / (√3 × 0.8 × 110V) = 2.165A.
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## What is motor current?

The “motor current” is the amplitude of the motor phase currents while the “phase current” represents the current measured on each of the motor phases. … The motor current (IQ) is always the amplitude of the currents on each phase.

## How do I calculate current?

The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).

## How do I calculate amps?

Obtain Amps from Watts and Volts:

Insert the number of Watts (W) and Volts (V) below and click on Calculate to obtain Amps (A). The formula is (W)/(V) =(A). For example, if you have a power of 10W running at 5V, the current is 10W / 5V = 2A. This comes from the equation I = P / V.

## How many amps is a 5 hp motor?

Example: A 5 HP motor at 230V, 3PH is12. 4 amps.

## How do you calculate current per phase?

Current = VA / voltage = 13900 / 230 = 60 A

Easy enough. To find the power given current, multiply by the voltage and then the power factor to convert to W. For a three-phase system multiply by three to get the total power.

## How do you calculate motor torque from current?

To calculate load torque, multiply the force (F) by the distance away from the rotational axis, which is the radius of the pulley (r). If the mass of the load (blue box) is 20 Newtons, and the radius of the pulley is 5 cm away, then the required torque for the application is 20 N x 0.05 m = 1 Nm.

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