Effect of Parameter Variations on the Performance of Permanent Magnet Motors

A comprehensive study of the parameter effects on both the synchronous and asynchronous performances of permanent magnet machines is presented. Based on the 2-axis theory for permanent magnet motor, performance equations are derived in terms of relative machine parameters. Such an analysis can be used successfully in design optimization of permanent magnet machines. A normalized power equation for evaluating the steady-state stability limits of such type of motor is also given. Simulation results obtained are confirmed with experimental results using- a number of different rotor designs. Useful conclusions have been provided, which are considered to be a good aid for designing any permanent magnet motor.