Permanent magnet synchronous motor with exterior‐rotor: Distributed or concentrated windings – motor performance comparison

Abstract

Purpose

The paper aims to present the comparison between the performances of the exterior‐rotor permanent magnet synchronous motors with distributed windings and the performances of the exterior‐rotor permanent magnet synchronous motors with concentrated windings.

Design/methodology/approach

Finite element method is used for motors performance determination. The BLDC operation mode for the motors with different slot and pole number combination and concentrated windings was accounted for in the comparison.

Findings

In the BLDC operation mode motor structures with concentrated windings with similar slot and pole numbers exhibit at the same current density similar or even higher torque capability and lower electromagnetic torque ripple in comparison to the motor structure with distributed windings. Motor structures with 9‐slot/8‐pole, 9‐slot/10‐pole, 12‐slot/10‐pole slot and pole number combinations are the most appropriate for the BLDC operation.

Originality/value

The paper shows which motor structures with distributed or concentrated windings in the BLDC operation mode produce lower torque ripple and higher average torque per ampere.

Citation

Štumberger, B., Štumberger, G., Hadžiselimović, M., Zagradišnik, I., Hamler, A. and Trlep, M. (2006), "Permanent magnet synchronous motor with exterior‐rotor: Distributed or concentrated windings – motor performance comparison", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 25 No. 3, pp. 721-726. https://doi.org/10.1108/03321640610666899