Design and Implementation of a Driving Strategy for Star-Connected Active Magnetic Bearings with Application to Sensorless Driving
For decades, sensorless position estimation methods gained lots of interest from the research community, especially in the field of electric drives and active magnetic bearings (AMBs). In particular, the direct flux control (DFC) technique promises unique advantages over other sensorless techniques,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/1/396 |
| _version_ | 1797625864193572864 |
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| author | Romain Brasse Jonah Vennemann Niklas König Matthias Nienhaus Emanuele Grasso |
| author_facet | Romain Brasse Jonah Vennemann Niklas König Matthias Nienhaus Emanuele Grasso |
| author_sort | Romain Brasse |
| collection | DOAJ |
| description | For decades, sensorless position estimation methods gained lots of interest from the research community, especially in the field of electric drives and active magnetic bearings (AMBs). In particular, the direct flux control (DFC) technique promises unique advantages over other sensorless techniques, such as a higher bandwidth, but on the other hand, it requires the coils to be connected in a star topology. Until now, star-point connections are rarely found on active magnetic bearings. In consequence, there is no known publication about the application of the DFC to an AMB to this date. In order to apply the DFC to an AMB, a star-point driving approach for AMBs must be developed beforehand. A star-connected driving approach, capable of driving a four-phase AMB, is proposed and validated against traditional H-bridges in a simulation. Further, the strategy is tested in a physical application and generalised for 4<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∗</mo><mi>n</mi></mrow></semantics></math></inline-formula> phases. In terms of current dynamics, the simulation results can be compared to the well-known full H-bridge driving. The experiments on the physical application show that the actual current in the coils follows a reference with satisfactory accuracy. Moreover, the inductance measurements of the coils show a strong dependency on the rotor’s position, which is crucial for sensorless operation. A star-point connection delivers a satisfying response behaviour in an AMB application, which makes sensorless techniques that require a star point, such as the DFC, applicable to active magnetic bearings. |
| first_indexed | 2024-03-11T10:02:30Z |
| format | Article |
| id | doaj.art-f76fbbd91f1f40bc8175492594946ba8 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T10:02:30Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-f76fbbd91f1f40bc8175492594946ba82023-11-16T15:18:36ZengMDPI AGEnergies1996-10732022-12-0116139610.3390/en16010396Design and Implementation of a Driving Strategy for Star-Connected Active Magnetic Bearings with Application to Sensorless DrivingRomain Brasse0Jonah Vennemann1Niklas König2Matthias Nienhaus3Emanuele Grasso4Laboratory of Actuation Technology, Saarland University, 66123 Saarbrücken, GermanyLaboratory of Actuation Technology, Saarland University, 66123 Saarbrücken, GermanyLaboratory of Actuation Technology, Saarland University, 66123 Saarbrücken, GermanyLaboratory of Actuation Technology, Saarland University, 66123 Saarbrücken, GermanyLaboratory of Actuation Technology, Saarland University, 66123 Saarbrücken, GermanyFor decades, sensorless position estimation methods gained lots of interest from the research community, especially in the field of electric drives and active magnetic bearings (AMBs). In particular, the direct flux control (DFC) technique promises unique advantages over other sensorless techniques, such as a higher bandwidth, but on the other hand, it requires the coils to be connected in a star topology. Until now, star-point connections are rarely found on active magnetic bearings. In consequence, there is no known publication about the application of the DFC to an AMB to this date. In order to apply the DFC to an AMB, a star-point driving approach for AMBs must be developed beforehand. A star-connected driving approach, capable of driving a four-phase AMB, is proposed and validated against traditional H-bridges in a simulation. Further, the strategy is tested in a physical application and generalised for 4<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>∗</mo><mi>n</mi></mrow></semantics></math></inline-formula> phases. In terms of current dynamics, the simulation results can be compared to the well-known full H-bridge driving. The experiments on the physical application show that the actual current in the coils follows a reference with satisfactory accuracy. Moreover, the inductance measurements of the coils show a strong dependency on the rotor’s position, which is crucial for sensorless operation. A star-point connection delivers a satisfying response behaviour in an AMB application, which makes sensorless techniques that require a star point, such as the DFC, applicable to active magnetic bearings.https://www.mdpi.com/1996-1073/16/1/396active magnetic bearingAMBstar connectionstar pointdirect flux controlDFC |
| spellingShingle | Romain Brasse Jonah Vennemann Niklas König Matthias Nienhaus Emanuele Grasso Design and Implementation of a Driving Strategy for Star-Connected Active Magnetic Bearings with Application to Sensorless Driving Energies active magnetic bearing AMB star connection star point direct flux control DFC |
| title | Design and Implementation of a Driving Strategy for Star-Connected Active Magnetic Bearings with Application to Sensorless Driving |
| title_full | Design and Implementation of a Driving Strategy for Star-Connected Active Magnetic Bearings with Application to Sensorless Driving |
| title_fullStr | Design and Implementation of a Driving Strategy for Star-Connected Active Magnetic Bearings with Application to Sensorless Driving |
| title_full_unstemmed | Design and Implementation of a Driving Strategy for Star-Connected Active Magnetic Bearings with Application to Sensorless Driving |
| title_short | Design and Implementation of a Driving Strategy for Star-Connected Active Magnetic Bearings with Application to Sensorless Driving |
| title_sort | design and implementation of a driving strategy for star connected active magnetic bearings with application to sensorless driving |
| topic | active magnetic bearing AMB star connection star point direct flux control DFC |
| url | https://www.mdpi.com/1996-1073/16/1/396 |
| work_keys_str_mv | AT romainbrasse designandimplementationofadrivingstrategyforstarconnectedactivemagneticbearingswithapplicationtosensorlessdriving AT jonahvennemann designandimplementationofadrivingstrategyforstarconnectedactivemagneticbearingswithapplicationtosensorlessdriving AT niklaskonig designandimplementationofadrivingstrategyforstarconnectedactivemagneticbearingswithapplicationtosensorlessdriving AT matthiasnienhaus designandimplementationofadrivingstrategyforstarconnectedactivemagneticbearingswithapplicationtosensorlessdriving AT emanuelegrasso designandimplementationofadrivingstrategyforstarconnectedactivemagneticbearingswithapplicationtosensorlessdriving |