The Experts below are selected from a list of 93 Experts worldwide ranked by ideXlab platform
Annette Muetze - One of the best experts on this subject based on the ideXlab platform.
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3-D FEM Calculation of Electromagnetic Properties of Single-Phase Induction Machines
IEEE Transactions on Energy Conversion, 2015Co-Authors: Johann Peter Bacher, Florian Waldhart, Annette MuetzeAbstract:In comparison with three-phase induction machines, modern single-phase induction machines normally have skewed Rotors, but show an elliptic magnetic field during start-up. In order to properly model the start-up of such a machine, this three-dimensional (3-D) characteristic has to be accounted for. This leads to the application of the 3-D finite-element method. This paper will introduce a new approach to model and analyze the start-up of such a single-phase machine, with the aim of higher computational efficiency. Furthermore, this paper will discuss how symmetries, both in the circumferential direction and along the motor shaft, can be exploited despite the skewing. This is achieved through transforming (rotating) the cutting plane, doubling the skewing angle, and increasing the Rotor Conductor conductivity. The analysis is carried out on a small two-pole 100-W machine used for household appliances. The theoretical results are compared with experimental results for six Rotors; each with a different skewing angle.
Johann Peter Bacher - One of the best experts on this subject based on the ideXlab platform.
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3-D FEM Calculation of Electromagnetic Properties of Single-Phase Induction Machines
IEEE Transactions on Energy Conversion, 2015Co-Authors: Johann Peter Bacher, Florian Waldhart, Annette MuetzeAbstract:In comparison with three-phase induction machines, modern single-phase induction machines normally have skewed Rotors, but show an elliptic magnetic field during start-up. In order to properly model the start-up of such a machine, this three-dimensional (3-D) characteristic has to be accounted for. This leads to the application of the 3-D finite-element method. This paper will introduce a new approach to model and analyze the start-up of such a single-phase machine, with the aim of higher computational efficiency. Furthermore, this paper will discuss how symmetries, both in the circumferential direction and along the motor shaft, can be exploited despite the skewing. This is achieved through transforming (rotating) the cutting plane, doubling the skewing angle, and increasing the Rotor Conductor conductivity. The analysis is carried out on a small two-pole 100-W machine used for household appliances. The theoretical results are compared with experimental results for six Rotors; each with a different skewing angle.
Sheng-yang Lin - One of the best experts on this subject based on the ideXlab platform.
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Rotor Conductor Arrangement Designs of High-Efficiency Direct-on-Line Synchronous Reluctance Motors for Metal Industry Applications
IEEE Transactions on Industry Applications, 2020Co-Authors: Cheng-tsung Liu, Pei-chun Shih, Zhe-hong Cai, Sheng-chan Yen, Lin Hsin-nan, Yu-wei Hsu, Ta-yin Luo, Sheng-yang LinAbstract:To meet different loading requirements in the metal industry, special attention must be paid to the operational performances and start-up characteristics of those electric motors implemented for desired driven applications. However, because of the global warming and energy conservation concerns, the enforced operational regulations have increased the complexity of those commonly applied induction motors for supplying the desired equipment driven forces. By adopting the same stator, the synchronous reluctance motor (SynRM) can be achieved with properly redesigned Rotor structure of an induction motor. Due to its robust structure and lack of secondary copper loss, it is very competitive for the related hoist, punch, roller, and pump applications. Furthermore, by inserting adequate ferrite permanent magnets and Conductors into the Rotor barriers, composition designs of the direct-on-line SynRMs (DOL_SynRMs) will also be proposed. The operational characteristics of the DOL_SynRMs for fulfilling different specifications will all be thoroughly investigated and confirmed by experimental measurements. The DOL_SynRM structures that can provide potential alternatives for related high-efficiency metal industry-driven applications can thus be validated.
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Rotor Conductor arrangement designs of high efficiency direct on line synchronous reluctance motors for metal industry applications
IEEE Industry Applications Society Annual Meeting, 2019Co-Authors: Cheng-tsung Liu, Pei-chun Shih, Zhe-hong Cai, Sheng-chan Yen, Yu-wei Hsu, Ta-yin Luo, Hsinnan Lin, Sheng-yang LinAbstract:To meet different loading requirements in the metal industry, special attention about the operational performances and start-up characteristics of those implemented electric motors for desired driven applications must be addressed. However, because of the global warming and energy conservation concerns, the enforced operational regulations have increased the complexity of those commonly applied induction motors for supplying the desired equipment driven forces. By adopting the same stator, the synchronous reluctance motor (SynRM) can be achieved with properly redesigned Rotor structure of an induction motor. Due to its robust structure and no secondary copper loss, it is very competitive for the related hoist, punch, roller, and pump applications. Furthermore, by inserting adequate ferrite permanent magnets and Conductors into the Rotor barriers, composition designs of the direct-on-line SynRMs (DOL_SynRMs) will also be proposed. The operational characteristics of the DOL_SynRMs for fulfilling different specifications will all be thoroughly investigated and confirmed by experimental measurements. The DOL_SynRM structures that can provide potential alternatives for related high-efficiency metal industry driven applications can thus be validated.
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IAS - Rotor Conductor Arrangement Designs of High-efficiency Direct-on-line Synchronous Reluctance Motors for Metal Industry Applications
2019 IEEE Industry Applications Society Annual Meeting, 2019Co-Authors: Cheng-tsung Liu, Pei-chun Shih, Zhe-hong Cai, Sheng-chan Yen, Lin Hsin-nan, Yu-wei Hsu, Ta-yin Luo, Sheng-yang LinAbstract:To meet different loading requirements in the metal industry, special attention about the operational performances and start-up characteristics of those implemented electric motors for desired driven applications must be addressed. However, because of the global warming and energy conservation concerns, the enforced operational regulations have increased the complexity of those commonly applied induction motors for supplying the desired equipment driven forces. By adopting the same stator, the synchronous reluctance motor (SynRM) can be achieved with properly redesigned Rotor structure of an induction motor. Due to its robust structure and no secondary copper loss, it is very competitive for the related hoist, punch, roller, and pump applications. Furthermore, by inserting adequate ferrite permanent magnets and Conductors into the Rotor barriers, composition designs of the direct-on-line SynRMs (DOL_SynRMs) will also be proposed. The operational characteristics of the DOL_SynRMs for fulfilling different specifications will all be thoroughly investigated and confirmed by experimental measurements. The DOL_SynRM structures that can provide potential alternatives for related high-efficiency metal industry driven applications can thus be validated.
Florian Waldhart - One of the best experts on this subject based on the ideXlab platform.
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3-D FEM Calculation of Electromagnetic Properties of Single-Phase Induction Machines
IEEE Transactions on Energy Conversion, 2015Co-Authors: Johann Peter Bacher, Florian Waldhart, Annette MuetzeAbstract:In comparison with three-phase induction machines, modern single-phase induction machines normally have skewed Rotors, but show an elliptic magnetic field during start-up. In order to properly model the start-up of such a machine, this three-dimensional (3-D) characteristic has to be accounted for. This leads to the application of the 3-D finite-element method. This paper will introduce a new approach to model and analyze the start-up of such a single-phase machine, with the aim of higher computational efficiency. Furthermore, this paper will discuss how symmetries, both in the circumferential direction and along the motor shaft, can be exploited despite the skewing. This is achieved through transforming (rotating) the cutting plane, doubling the skewing angle, and increasing the Rotor Conductor conductivity. The analysis is carried out on a small two-pole 100-W machine used for household appliances. The theoretical results are compared with experimental results for six Rotors; each with a different skewing angle.
Shi Jinfei - One of the best experts on this subject based on the ideXlab platform.
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Study on the Influence of Design and Optimization of Rotor Bars on Parameters of a Line-Start Synchronous Reluctance Motor
IEEE Transactions on Industry Applications, 2020Co-Authors: Hu Yusheng, Yong Xiao, Bin Chen, Shi JinfeiAbstract:The Rotor Conductor bars of the line-start synchronous reluctance motor (LS-SynRM) make the motor have self-starting capability. The distribution of the Rotor Conductor bars not only has a great impact on the starting capability, but also affects the steady-state performance of the LS-SynRM. The steady-state performance of the LS-SynRM mainly depends on the inductance parameters. And the distribution of the Rotor Conductor bars directly affects the variation of the inductance parameters, especially the d -axis inductance. Based on the steady-state characteristics of LS-SynRM, an evaluation method based on finite element analysis (FEA) is proposed to determine whether the Rotor Conductor bars of LS-SynRM is reasonable. First, the d -axis inductance reference model without Rotor Conductor bars is established, the target of optimize is to reduce the weakening effect of Rotor Conductor bars on the d -axis inductance, and the optimal distribution structure of Rotor Conductor bars is determined. The optimization results show that the d -axis inductance of the determined Rotor Conductor bars structure in this article reaches 96.2% of the reference inductance and the distribution of the Rotor bars achieves better results. It is verified that the improved LS-SynRM has better efficiency, starting capability, and maximum torque than the initial LS-SynRM by FEA and prototype test. At the same time, comparing with the performance of the three-phase squirrel cage induction motor for compressor, it is proved that the improved LS-SynRM has higher efficiency and a good application prospect.
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Rotor design and optimization of the single-phase line-start synchronous reluctance motor
2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019Co-Authors: Hu Yusheng, Yong Xiao, Bin Chen, Shi Jinfei, Li XiaAbstract:Three-phase line-start synchronous reluctance motor (LS-SynRM) combines the structural features of three-phase squirrel cage induction motor (SCIM) and synchronous reluctance motor, it can start up by asynchronous torque from the Rotor Conductor bars, it can running by reluctance torque due to the flux barriers in synchronization. Firstly, this paper briefly introduces the mathematical model and starting characteristics of LS-SynRM, Then, the Rotor structure of the LS-SynRM is optimized. The influence of the number of Rotor barrier layers and the proportion of the flux barriers on the dq-axis inductance of the LS-SynRM is simulated; an optimal Rotor flux barriers structure is obtained by finite element analysis (FEA). On this basis, the influence of Rotor squirrel cage Conductor bars distribution on the starting ability of LS-SynRM is studied and the Rotor structure is determined. The simulated rated efficiency of the optimized LS-SynRM model is improved by 2.4% compared with the same frame number IE3 three-phase squirrel cage induction motor (SCIM). Finally, the performance of the optimized LS-SynRM is verified by the prototype test.
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Effect of Direction and Shape of Rotor Conductor Bars on Parameters of Line-Start Synchronous Reluctance Motor
2018 21st International Conference on Electrical Machines and Systems (ICEMS), 2018Co-Authors: Hu Yusheng, Yong Xiao, Bin Chen, Shi JinfeiAbstract:Three-phase line-start synchronous reluctance motor (LS-SynRM) combines the structural features of three-phase squirrel cage induction motor (SCIM) and synchronous reluctance motor, it can start up by asynchronous torque from the Rotor Conductor bars, and running by reluctance torque due to the flux barrier in synchronization. This paper briefly introduces the steady-state characteristics of LS-SynRM, and a new simulation method is presented to determine whether the Rotor Conductor bars of LS-SynRM is designed properly. The reason why the traditional Rotor Conductor bars has poor d-axis inductance is analyzed, and proposes a new structure of the Rotor Conductor bars to improve the d-axis inductance of LS-SynRM. Then the parameters of the proposed Conductor bars LS-SynRM is calculated by finite element analysis (FEA), and the inductance difference of $d-q$ axis $(L_d-L_q)$ is increased by 29.7% than the traditional model when the stator current is 4A. Finally, we make the prototypes and measure the performances of them. The efficiency of the proposed LS-SynRM prototype is improved by 1.6% compared with the traditional LS-SynRM prototype and by 2.3% compared with the SCIM at rated torque. The effectiveness of the proposed Rotor Conductor bars in this paper was verified by the prototype test.
