Electrical / Electronics
DC motor starting current and torque
Calculates current and torque at zero back EMF in a simple armature model.
Related calculators
DC motor back EMF
Calculates back EMF from supply voltage, armature current and armature resistance; with a back-EMF constant it also gives angular speed.
Motor torque from power and speed
Calculates approximate torque from power in kW and rotational speed.
Simple three-phase motor current
Calculates approximate three-phase motor current from power, voltage, power factor, and efficiency.
Motor efficiency
Calculates motor efficiency as output power divided by input power.
Motor input power
Calculates input power from output power and efficiency.
Motor power from torque and speed
Calculates approximate power from torque and rotational speed.