Investigation of the Effect of The Temperature and Magnetization Pattern on Flux Density, Instantaneous Torque, Unbalanced Magnetic Forces of a Surface Inset PMM

Abstract

Electrical machines utilized in domestic applications such as ceiling fans should have low losses and cost. Permanent magnets are used instead of rotor excitation to reduce losses. Therefore, not only the losses of the rotor winding are eliminated, but also the efficiency of the machine is increased. A surface inset consequent pole (SICP) machine has also been used to reduce costs. Because less magnets are utilized in this structure. The main problem is the affecting the residual flux density from temperature. In this paper, the SICP is analyzed by two-dimensional method, then magnetic flux density, Back-EMF, instantaneous torque and unbalanced magnetic forces are calculated. In this research, either the effect of temperature changes on the mentioned cases has been investigated, or two types of magnetization patterns include radial and parallel have been considered.