The double-excited electromechanical system shown in Figure P13.37 moves horizontally. Ass...

The double-excited electromechanical system shown in Figure P13.37 moves horizontally. Assume that resistance, magnetic leakage, and fringing are negligible; the permeability of the core is very large; and the cross section of the structure is ω × ω. Find

a. The reluctance of the magnetic circuit.

b. The magnetic energy stored in the air gap.

c. The force on the movable part as a function of its position.

Figure P13.37