Modeling of an Universal Motor Supplied by a Harmonic Voltage

In present article a dynamic model of universal motors, based on the design data is developed. Suppose the supply voltage is harmonic, but variable. After representing of the mathematical model a simulation model based on the Matlab-Simulink is derived; this allows for the determination of the waveforms of the speed current and torque of the machine for different state operation. Induced voltage of the rotor is determined as a function of the magnetic core saturation. The motor performances are computed, using the circuit parameters determined by measurements.¹