Motor Current Calculator, Formula, Motor Current Calculation

Motor Current Calculator:

Enter the values of power, P(kW), voltage, V(V), efficiency factor, EF and power factor, PF to determine the value of Motor current, Im(A).

 Enter Power: kW Enter Voltage: V Enter Efficiency Factor: Enter Power Factor: Result – Motor Current: A

Motor Current Formula:

Motor current refers to the electrical current required by a motor to produce mechanical power.

The amount of current drawn by an electric motor is influenced by various factors including its power rating, the voltage at which it operates, and its efficiency and power factor.

Electric motors operate on the principle of electromagnetic induction, which involves the interaction of magnetic fields and electric currents to produce force in the form of rotational motion.

These concepts revolve around how electric motors convert electrical energy into mechanical energy, the factors that influence their current draw, and the implications for power systems and motor control.

Motor current, Im(A) in amperes is calculated by dividing the product of 1000 and power, P(kW) in kilowatts by the product of square root of 3, voltage, V(V) in volts, efficiency factor, EF and power factor, PF.

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Motor current, Im(A) = 1000 * P(kW) / √3 * V(V) * EF * PF

Im(A) = motor current in amperes, A.

P(kW) = power in kilowatts, kW.

V(V) = voltage in voltas, V.

EF = efficiency factor.

PF = power factor.

Motor Current Calculation:

1. Calculate the motor current for a motor with a power rating of 75 kW, operating at 380 volts, with an efficiency of 88%, and a power factor of 0.92.

Given: P(kW) = 75kW, V(V) = 380V, EF = 88%, PF = 0.92.

Motor current, Im(A) = 1000 * P(kW) / √3 * V(V) * EF * PF

Im(A) = 1000 * 75 / √3 * 380 * 0.88 * 0.92

Im(A) = 75000 / 532.861

Im(A) = 140.977A.

1. Determine the required power if a motor draws 150 amperes at 440 volts, with an efficiency of 90% and a power factor of 0.95.

Given: Im(A) = 150A, V(V) = 440V, EF = 90%, PF = 0.95.

Motor current, Im(A) = 1000 * P(kW) / √3 * V(V) * EF * PF

P(kW) = Im(A) * √3 * V(V) * EF * PF / 1000

P(kW) = 150 * √3 * 440 * 0.9 * 0.95 / 1000

P(kW) = 102919 / 1000

P(kW) = 102.919kW.