AC Motor Induction Diagram
Can I model the motor as a single phase motor


One phase of a three-phase motor is usually modeled. You are then working with the line to neutral voltage and the phase current. The electrical power to the circuit, the losses and the electrical power converted to mechanical power are each multiplied by three for the complete motor.


  does a motor circuit symbol presume an inductance value


A three-phase motor circuit symbol would presume a circuit that includes some inductance and resistance. A portion of the resistance is variable to represent the conversion of electrical power to mechanical power. The usual model for one phase is shown below. Note that there is no capacitance in a three-phase induction motor.



For a situation in which the voltage current and power factor are given, the model must be reduced to an inductor and series resistor for each phase of a wye connected load. The model thus represents to power going into the motor. To determine the mechanical power, you must have the efficiency. The model represents one specific load point.