Further Investigations on Unconventional Slot Numbers in Concentrated Winding Electric Motors: Rotor Eccentricity and Conventional Methods for Torque Ripple Reduction
Electric motors with unconventional slot numbers, especially prime numbers, have been shown to reduce cogging torque and torque ripple. Our previous study investigated an 8p12s servo motor topology known to be prone to cogging torque and torque ripple; in this publication, the research is expanded t...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Sciendo
2025-02-01
|
| Series: | Power Electronics and Drives |
| Subjects: | |
| Online Access: | https://doi.org/10.2478/pead-2025-0006 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849225048981766144 |
|---|---|
| author | Königs Mike Harmel Michael Loehlein Bernd |
| author_facet | Königs Mike Harmel Michael Loehlein Bernd |
| author_sort | Königs Mike |
| collection | DOAJ |
| description | Electric motors with unconventional slot numbers, especially prime numbers, have been shown to reduce cogging torque and torque ripple. Our previous study investigated an 8p12s servo motor topology known to be prone to cogging torque and torque ripple; in this publication, the research is expanded to a more robust 10p12s servomotor, including a comparison of the novel unconventional winding with a conventional topology with breadloaf magnets. Furthermore, Finite element method (FEM) simulations with rotor eccentricities are conducted to evaluate the impact of the novel topology on forces and torques under imperfect manufacturing. It is shown that the novel quadruple-layer topology with prime number of slots can effectively reduce cogging torque and torque ripple. Furthermore, the commonly used 10p12s servomotor topology can achieve similar performance using skewing and breadloaf permanent magnets. The novel topology is shown to be prone to torque ripple due to rotor eccentricity. Similar results to conventional concentrated windings can be achieved under imperfect manufacturing conditions. |
| format | Article |
| id | doaj-art-b4c16d175e3d4f3389eaac963dfbf61f |
| institution | Kabale University |
| issn | 2543-4292 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Power Electronics and Drives |
| spelling | doaj-art-b4c16d175e3d4f3389eaac963dfbf61f2025-08-25T06:12:05ZengSciendoPower Electronics and Drives2543-42922025-02-011019610910.2478/pead-2025-0006Further Investigations on Unconventional Slot Numbers in Concentrated Winding Electric Motors: Rotor Eccentricity and Conventional Methods for Torque Ripple ReductionKönigs Mike0Harmel Michael1Loehlein Bernd2Flensburg University of Applied Sciences, Flensburg, GermanyFlensburg University of Applied Sciences, Flensburg, GermanyFlensburg University of Applied Sciences, Flensburg, GermanyElectric motors with unconventional slot numbers, especially prime numbers, have been shown to reduce cogging torque and torque ripple. Our previous study investigated an 8p12s servo motor topology known to be prone to cogging torque and torque ripple; in this publication, the research is expanded to a more robust 10p12s servomotor, including a comparison of the novel unconventional winding with a conventional topology with breadloaf magnets. Furthermore, Finite element method (FEM) simulations with rotor eccentricities are conducted to evaluate the impact of the novel topology on forces and torques under imperfect manufacturing. It is shown that the novel quadruple-layer topology with prime number of slots can effectively reduce cogging torque and torque ripple. Furthermore, the commonly used 10p12s servomotor topology can achieve similar performance using skewing and breadloaf permanent magnets. The novel topology is shown to be prone to torque ripple due to rotor eccentricity. Similar results to conventional concentrated windings can be achieved under imperfect manufacturing conditions.https://doi.org/10.2478/pead-2025-0006synchronous motortorque ripplecogging torqueconcentrated windingpermanent magnet |
| spellingShingle | Königs Mike Harmel Michael Loehlein Bernd Further Investigations on Unconventional Slot Numbers in Concentrated Winding Electric Motors: Rotor Eccentricity and Conventional Methods for Torque Ripple Reduction Power Electronics and Drives synchronous motor torque ripple cogging torque concentrated winding permanent magnet |
| title | Further Investigations on Unconventional Slot Numbers in Concentrated Winding Electric Motors: Rotor Eccentricity and Conventional Methods for Torque Ripple Reduction |
| title_full | Further Investigations on Unconventional Slot Numbers in Concentrated Winding Electric Motors: Rotor Eccentricity and Conventional Methods for Torque Ripple Reduction |
| title_fullStr | Further Investigations on Unconventional Slot Numbers in Concentrated Winding Electric Motors: Rotor Eccentricity and Conventional Methods for Torque Ripple Reduction |
| title_full_unstemmed | Further Investigations on Unconventional Slot Numbers in Concentrated Winding Electric Motors: Rotor Eccentricity and Conventional Methods for Torque Ripple Reduction |
| title_short | Further Investigations on Unconventional Slot Numbers in Concentrated Winding Electric Motors: Rotor Eccentricity and Conventional Methods for Torque Ripple Reduction |
| title_sort | further investigations on unconventional slot numbers in concentrated winding electric motors rotor eccentricity and conventional methods for torque ripple reduction |
| topic | synchronous motor torque ripple cogging torque concentrated winding permanent magnet |
| url | https://doi.org/10.2478/pead-2025-0006 |
| work_keys_str_mv | AT konigsmike furtherinvestigationsonunconventionalslotnumbersinconcentratedwindingelectricmotorsrotoreccentricityandconventionalmethodsfortorqueripplereduction AT harmelmichael furtherinvestigationsonunconventionalslotnumbersinconcentratedwindingelectricmotorsrotoreccentricityandconventionalmethodsfortorqueripplereduction AT loehleinbernd furtherinvestigationsonunconventionalslotnumbersinconcentratedwindingelectricmotorsrotoreccentricityandconventionalmethodsfortorqueripplereduction |