Problem 1 (Textbook 2.11) Consider the electromechanical system shown in Fig. 3.1. Assume the peak amplitude of the mutual inductance is Lgr. Note that the angle 8, tells us the angular position of the magnetic axis of the rotor relative to the physical position of the stator windings. (a) Express the mutual inductance (Lab) assuming that it varies sinusoidally. (b) Express the electromagnetic torque Te assuming the currents are dc. Figure 3.1 PO J8 o Lo 1967 0₁ A 2-winding device with clockwise rotation.

Fig: 1