Armature Resistance in DC Motor Formulas

The Armature Resistance is the ohmic resistance of the copper winding wires plus the brush resistance in an electrical dc motor. And is denoted by R_a. Armature Resistance is usually measured using the Ohm for Electric Resistance. Note that the value of Armature Resistance is always positive.

DC Motor formulas that make use of Armature Resistance

fxMachine Construction Constant of DC MotorGo

fxSupply Voltage given Overall Efficiency of DC MotorGo

fxMagnetic Flux of DC MotorGo

fxMotor Speed of DC Motor given FluxGo

fxMechanical Power Developed in DC Motor given Input PowerGo

FAQ

What is the Armature Resistance?

The Armature Resistance is the ohmic resistance of the copper winding wires plus the brush resistance in an electrical dc motor. Armature Resistance is usually measured using the Ohm for Electric Resistance. Note that the value of Armature Resistance is always positive.

Can the Armature Resistance be negative?

No, the Armature Resistance, measured in Electric Resistance cannot be negative.

What unit is used to measure Armature Resistance?

Armature Resistance is usually measured using the Ohm[Ω] for Electric Resistance. Megohm[Ω], Microhm[Ω], Volt per Ampere[Ω] are the few other units in which Armature Resistance can be measured.

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