No load magnetic field prediction of double-sided linear permanent magnet machines

Accurate knowledge of magnetic field distribution of a machine is essential aspect for its design. Magnetic flux density is useful for estimation of machine performance such as induced voltage, cogging force/torque, force/torque, and flux weakening capability of the machine. Moreover, it is also helpful for performance prediction and optimization. In this paper analytically no load magnetic fields for iron-cored double-sided linear permanent magnet machine (DSLPM) has been predicted. The machine topology is comprises of air-gaps machine, and can have two configuration either NN or NS configuration depending on magnet arrangement. The analytical results obtained has been verified with finite element analysis (FEA) results. The closeness of these result, supports correctness of analysis.