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Input Power of DC Motor Formula

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Input Power refers to the power input required to rotate the armature of the dc machine, which in turn generates electrical/mechanical power. The input power is provided by an external source. Check FAQs

P in = V s \cdot I a

P_in - Input Power?V_s - Supply Voltage?I_a - Armature Current?

Input Power of DC Motor Example

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With units

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Here is how the Input Power of DC Motor equation looks like with Values.

Here is how the Input Power of DC Motor equation looks like with Units.

Here is how the Input Power of DC Motor equation looks like.

180 = 240 \cdot 0.75

180W = 240V \cdot 0.75A

180 = 240 \cdot 0.75

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Input Power of DC Motor Solution

Follow our step by step solution on how to calculate Input Power of DC Motor?

FIRST Step Consider the formula

P in = V s \cdot I a

Next Step Substitute values of Variables

∴

P in = 240V \cdot 0.75A

Next Step Prepare to Evaluate

∴

P in = 240 \cdot 0.75

LAST Step Evaluate

∴

P in = 180W

Input Power of DC Motor Formula Elements

Variables

Input Power

Input Power refers to the power input required to rotate the armature of the dc machine, which in turn generates electrical/mechanical power. The input power is provided by an external source.

Symbol: P_in

Measurement: PowerUnit: W

Note: Value can be positive or negative.

Formulas to find Input Power

Supply Voltage

Supply Voltage refers to the voltage developed at the supply terminal of a generator.

Symbol: V_s

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Supply Voltage

Armature Current

Armature Current is defined as the current developed in the armature of an electrical DC generator due to movement of rotor.

Symbol: I_a

Measurement: Electric CurrentUnit: A

Note: Value can be positive or negative.

Formulas to find Armature Current

Other formulas in DC Machine Characterstics category

Go Design Constant of DC Machine

K f = \frac{Z \cdot P}{2 \cdot π \cdot n ll}

Go Angular Speed of DC Machine using Kf

ω s = \frac{V a}{K f \cdot Φ \cdot I a}

Go Back Pitch for DC Machine

Y b = (\frac{2 \cdot n slot}{P}) + 1

Go Front Pitch for DC Machine

Y F = (\frac{2 \cdot n slot}{P}) - 1

How to Evaluate Input Power of DC Motor?

Input Power of DC Motor evaluator uses Input Power = Supply Voltage*Armature Current to evaluate the Input Power, The Input Power of DC Motor formula is defined as the power supplied at the input terminal of a dc motor. Input Power is denoted by P_in symbol.

How to evaluate Input Power of DC Motor using this online evaluator? To use this online evaluator for Input Power of DC Motor, enter Supply Voltage (V_s) & Armature Current (I_a) and hit the calculate button.

FAQs on Input Power of DC Motor

What is the formula to find Input Power of DC Motor?

The formula of Input Power of DC Motor is expressed as Input Power = Supply Voltage*Armature Current. Here is an example- 180 = 240*0.75.

How to calculate Input Power of DC Motor?

With Supply Voltage (V_s) & Armature Current (I_a) we can find Input Power of DC Motor using the formula - Input Power = Supply Voltage*Armature Current.

Can the Input Power of DC Motor be negative?

Yes, the Input Power of DC Motor, measured in Power can be negative.

Which unit is used to measure Input Power of DC Motor?

Input Power of DC Motor is usually measured using the Watt[W] for Power. Kilowatt[W], Milliwatt[W], Microwatt[W] are the few other units in which Input Power of DC Motor can be measured.

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