Analytical optimisation of electromagnetic design of a linear (tubular) switched reluctance motor

The paper presents a method for optimising radial proportions of the magnetic circuit of a linear tubular switched reluctance motor in terms of maximising the developed thrust from a given machine volume at constant (rated) dissipation. The method is based on the use of analytically derived expressions for the machine’s phase inductance in the position of full misalignment between phase saliencies and mover teeth, and the flux-linkage vs. current relationship in the aligned position. The average thrust is calculated from a complete cycle of co-energy change.