Three-phase variable reluctance energy harvesting
A variable reluctance energy harvester (VREH) based on electromagnetic induction is developed for generating electrical energy from low-speed rotary motion. The challenge of a VREH at low rotational speeds is not only the low output power, but also the torque ripple that the harvester generates. Cog...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-05-01
|
| Series: | Energy Conversion and Management: X |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590174522000344 |
| _version_ | 1818268843129176064 |
|---|---|
| author | Ye Xu Ying Zhang Sebastian Bader Bengt Oelmann Junyi Cao |
| author_facet | Ye Xu Ying Zhang Sebastian Bader Bengt Oelmann Junyi Cao |
| author_sort | Ye Xu |
| collection | DOAJ |
| description | A variable reluctance energy harvester (VREH) based on electromagnetic induction is developed for generating electrical energy from low-speed rotary motion. The challenge of a VREH at low rotational speeds is not only the low output power, but also the torque ripple that the harvester generates. Cogging torque, the major contribution to this torque ripple, is an inherent characteristic of VREH and is caused by its geometric features. Cogging torque produces acoustic noise and mechanical vibration for a drive system into which the VREH is embedded. This issue is of particular importance at low speeds and with light loads. In this paper, we use an m-shaped VREH as an example to propose a three-phase design in order to reduce the cogging torque but maintain a high output power at low speeds of 5 rpm to 20 rpm. Three identical m-shaped pickup units in a proper arrangement generate high amounts of electrical energy in three phases, but result in a lower torque ripple. Ten prototypes based on the proposed design were fabricated and tested, and their performance were in good agreement with the simulation results. By using the three pickup units in an optimized arrangement, the VREH enhances the energy harvesting performance in comparison to three single pickup units. At the same time, the torque ripple is reduced to one fifth of that produced by a single pickup unit. This demonstrates the strong potential of the three-phase VREH for implementations of self-powered wireless sensing systems in terms of energy output and mechanical effects on the rotary host. |
| first_indexed | 2024-12-12T20:44:55Z |
| format | Article |
| id | doaj.art-63c2160bcbc74d5eb1faa0270f9dd14f |
| institution | Directory Open Access Journal |
| issn | 2590-1745 |
| language | English |
| last_indexed | 2024-12-12T20:44:55Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Conversion and Management: X |
| spelling | doaj.art-63c2160bcbc74d5eb1faa0270f9dd14f2022-12-22T00:12:36ZengElsevierEnergy Conversion and Management: X2590-17452022-05-0114100211Three-phase variable reluctance energy harvestingYe Xu0Ying Zhang1Sebastian Bader2Bengt Oelmann3Junyi Cao4Department of Electronics Design, Mid Sweden University, 85170 Sundsvall, Sweden; Corresponding author.Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaDepartment of Electronics Design, Mid Sweden University, 85170 Sundsvall, SwedenDepartment of Electronics Design, Mid Sweden University, 85170 Sundsvall, SwedenKey Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaA variable reluctance energy harvester (VREH) based on electromagnetic induction is developed for generating electrical energy from low-speed rotary motion. The challenge of a VREH at low rotational speeds is not only the low output power, but also the torque ripple that the harvester generates. Cogging torque, the major contribution to this torque ripple, is an inherent characteristic of VREH and is caused by its geometric features. Cogging torque produces acoustic noise and mechanical vibration for a drive system into which the VREH is embedded. This issue is of particular importance at low speeds and with light loads. In this paper, we use an m-shaped VREH as an example to propose a three-phase design in order to reduce the cogging torque but maintain a high output power at low speeds of 5 rpm to 20 rpm. Three identical m-shaped pickup units in a proper arrangement generate high amounts of electrical energy in three phases, but result in a lower torque ripple. Ten prototypes based on the proposed design were fabricated and tested, and their performance were in good agreement with the simulation results. By using the three pickup units in an optimized arrangement, the VREH enhances the energy harvesting performance in comparison to three single pickup units. At the same time, the torque ripple is reduced to one fifth of that produced by a single pickup unit. This demonstrates the strong potential of the three-phase VREH for implementations of self-powered wireless sensing systems in terms of energy output and mechanical effects on the rotary host.http://www.sciencedirect.com/science/article/pii/S2590174522000344Energy harvestingRotational energyVariable reluctanceCogging torqueTorque rippleSensor systems |
| spellingShingle | Ye Xu Ying Zhang Sebastian Bader Bengt Oelmann Junyi Cao Three-phase variable reluctance energy harvesting Energy Conversion and Management: X Energy harvesting Rotational energy Variable reluctance Cogging torque Torque ripple Sensor systems |
| title | Three-phase variable reluctance energy harvesting |
| title_full | Three-phase variable reluctance energy harvesting |
| title_fullStr | Three-phase variable reluctance energy harvesting |
| title_full_unstemmed | Three-phase variable reluctance energy harvesting |
| title_short | Three-phase variable reluctance energy harvesting |
| title_sort | three phase variable reluctance energy harvesting |
| topic | Energy harvesting Rotational energy Variable reluctance Cogging torque Torque ripple Sensor systems |
| url | http://www.sciencedirect.com/science/article/pii/S2590174522000344 |
| work_keys_str_mv | AT yexu threephasevariablereluctanceenergyharvesting AT yingzhang threephasevariablereluctanceenergyharvesting AT sebastianbader threephasevariablereluctanceenergyharvesting AT bengtoelmann threephasevariablereluctanceenergyharvesting AT junyicao threephasevariablereluctanceenergyharvesting |