Abstract

Radial flux permanent magnet machines are of widespread use in several applications, particularly in highperformance applications since permanent magnets offer highefficiency in a wider range of power and working speed. Electrical machines suffer from several mechanical imperfections such as manufacturing tolerance and eccentricity, the latest become more critical in high-speed operation. Eccentricity is a phenomenon affecting particularly radial flux machines introducing mechanical vibrations, reducing the machine efficiency, and even lead to motor failure. This article provides with a mathematical approach to estimate the airgap magnetic flux density of radial flux permanent magnet electrical machines.