Filter Influence on Rotor Losses in Coreless Axial Flux Permanent Magnet Machines
This paper investigates the eddy current losses induced in the rotor of coreless Axial-Flux machines. The calculation of eddy currents in the magnets requires the simulation of the inverter and the filter to obtain the harmonic content of the stator currents and FEM analysis of the magnets in the...
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| Format: | Article |
| Language: | English |
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Stefan cel Mare University of Suceava
2013-02-01
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| Series: | Advances in Electrical and Computer Engineering |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.4316/AECE.2013.01014 |
| _version_ | 1811287408624271360 |
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| author | SANTIAGO, J. GONCALVES de OLIVEIRA, J. BERNHOFF, H. |
| author_facet | SANTIAGO, J. GONCALVES de OLIVEIRA, J. BERNHOFF, H. |
| author_sort | SANTIAGO, J. |
| collection | DOAJ |
| description | This paper investigates the eddy current losses induced in the rotor of coreless Axial-Flux machines. The calculation of eddy currents in the magnets requires the simulation of the inverter and the filter to obtain the harmonic content of the stator currents and FEM analysis of the magnets in the rotor. Due to the low inductance in coreless machines, the induced eddy current losses in the rotor remain lower than in traditional slotted machines. If only machine losses are considered, filters in DC/AC converters are not required in machines with wide airgaps as time harmonic losses in the rotor are very low.The harmonic content both from simulations and experimental results of a DC/AC converter are used to calculate the eddy currents in the rotor magnets. The properties of coreless machine topologies are investigated and some simplifications are proposed for time efficient 3D-FEM analysis. The time varying magnetic field can be considered constant over the magnets when the pole is divided in several magnets.The simplified FEM method to calculate eddy current losses is applicable to coreless machines with poles split into several magnets, although the conclusions are applicable to all coreless and slotless motors and generators. |
| first_indexed | 2024-04-13T03:18:01Z |
| format | Article |
| id | doaj.art-d79729f543234ce9a1a8a0f81ef426bb |
| institution | Directory Open Access Journal |
| issn | 1582-7445 1844-7600 |
| language | English |
| last_indexed | 2024-04-13T03:18:01Z |
| publishDate | 2013-02-01 |
| publisher | Stefan cel Mare University of Suceava |
| record_format | Article |
| series | Advances in Electrical and Computer Engineering |
| spelling | doaj.art-d79729f543234ce9a1a8a0f81ef426bb2022-12-22T03:04:52ZengStefan cel Mare University of SuceavaAdvances in Electrical and Computer Engineering1582-74451844-76002013-02-01131818610.4316/AECE.2013.01014Filter Influence on Rotor Losses in Coreless Axial Flux Permanent Magnet MachinesSANTIAGO, J.GONCALVES de OLIVEIRA, J.BERNHOFF, H.This paper investigates the eddy current losses induced in the rotor of coreless Axial-Flux machines. The calculation of eddy currents in the magnets requires the simulation of the inverter and the filter to obtain the harmonic content of the stator currents and FEM analysis of the magnets in the rotor. Due to the low inductance in coreless machines, the induced eddy current losses in the rotor remain lower than in traditional slotted machines. If only machine losses are considered, filters in DC/AC converters are not required in machines with wide airgaps as time harmonic losses in the rotor are very low.The harmonic content both from simulations and experimental results of a DC/AC converter are used to calculate the eddy currents in the rotor magnets. The properties of coreless machine topologies are investigated and some simplifications are proposed for time efficient 3D-FEM analysis. The time varying magnetic field can be considered constant over the magnets when the pole is divided in several magnets.The simplified FEM method to calculate eddy current losses is applicable to coreless machines with poles split into several magnets, although the conclusions are applicable to all coreless and slotless motors and generators.http://dx.doi.org/10.4316/AECE.2013.01014Eddy currentsharmonic filterspermanent magnet machinespower filterspermanent magnets synchronous machineslotless machines |
| spellingShingle | SANTIAGO, J. GONCALVES de OLIVEIRA, J. BERNHOFF, H. Filter Influence on Rotor Losses in Coreless Axial Flux Permanent Magnet Machines Advances in Electrical and Computer Engineering Eddy currents harmonic filters permanent magnet machines power filters permanent magnets synchronous machine slotless machines |
| title | Filter Influence on Rotor Losses in Coreless Axial Flux Permanent Magnet Machines |
| title_full | Filter Influence on Rotor Losses in Coreless Axial Flux Permanent Magnet Machines |
| title_fullStr | Filter Influence on Rotor Losses in Coreless Axial Flux Permanent Magnet Machines |
| title_full_unstemmed | Filter Influence on Rotor Losses in Coreless Axial Flux Permanent Magnet Machines |
| title_short | Filter Influence on Rotor Losses in Coreless Axial Flux Permanent Magnet Machines |
| title_sort | filter influence on rotor losses in coreless axial flux permanent magnet machines |
| topic | Eddy currents harmonic filters permanent magnet machines power filters permanent magnets synchronous machine slotless machines |
| url | http://dx.doi.org/10.4316/AECE.2013.01014 |
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