A hybrid method for cogging torque calculation for mass produced permanent magnet machines

摘要

Permanent magnet brushless machines are widely used in high performance applications like the field of automotive industry or robotics. In most cases these applications need high torque density and smooth torque. There are many fast analytic calculation methods for cogging torque but they cope only with machines having no mechanical misalignments. A hybrid calculation method is presented in the paper which can be used to calculate cogging torque, and is also applicable to analyse the effect for usual manufacturing misalignments like air gap eccentricity.