Littérature scientifique sur le sujet « Standstill magnetization »
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Articles de revues sur le sujet "Standstill magnetization"
Uno, Koji, Yuta Idehara, Daichi Morita et Kuniyuki Furukawa. « An improved apparent polar wander path for southwest Japan : post-Cretaceous multiphase rotations with respect to the Asian continent ». Earth, Planets and Space 73, no 1 (22 juin 2021). http://dx.doi.org/10.1186/s40623-021-01457-6.
Texte intégralde Sousa, Flavia Domingues, Alexandre Battiston, Farid Meibody-Tabar et Serge Pierfederici. « Evaluation of the Magnetic Behavior of a Single Pole Pair Fe-Cr-Co-based Memory Motor Considering a Standstill Magnetization ». IEEE Transactions on Magnetics, 2022, 1. http://dx.doi.org/10.1109/tmag.2022.3141895.
Texte intégralThèses sur le sujet "Standstill magnetization"
Domingues, de Sousa Flávia. « Study and modeling of a Fe-Cr-Co magnet based Variable Flux Memory Machine for its supply and mechanical sensorless control at high speed ». Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0105.
Texte intégralPermanent Magnet Synchronous Machines (PMSMs) have been widely used for electrification transportation applications. Producing their magnet flux from rare-earth magnets (e.g. Nd-Fe-B magnets), these machines have had their long-term use increasingly questioned due to the risks of supply, price variability and the environmental challenges related to the extraction and recycling of these mentioned materials. To this scenario, can be also added the limitations of PMSMs for being used in large torque-speed ranges, requiring usually the implementation of flux-weakening strategies, based on supplying the machine with an increasingly negative direct stator current component as the rotor speed also increases. In case of non-salient pole machines the Joule losses can be enhanced and the efficiency consequently reduced. Capable of operating in a wide torque-speed range, the Variable Flux Memory Machines (VFMMs) have emerged as an option characterized by controllable magnetic flux density from short-time currents pulses supplying the armature windings. All this thanks to the highly non-linear hysteresis loop characterizing the low coercive force magnets used as source of flux. Al-Ni-Co alloys has been the choice of many researches for these applications. However, similar magnetic materials as Fe-Cr-Co are still little explored, besides advantageous characteristics as their lower content of Cobalt and mechanical proprieties. Within this framework, this thesis proposes the study of single-type AC-magnetized single pole pair VFMM, composed of a Fe-Cr-Co-based rotor. The machine geometry is designed from a PMSM, in which the rotor pf Nd-Fe-B is directly replaced by a solid cylinder of FeCrCo36/5. First, a focus on the study of the magnetic behavior of the magnet when inserted in the machine environment. Because of the anisotropy differentiating the hysteresis loop of the FeCrCo36/5 in the a easy or hard magnetization directions, two different methodologies are proposed for describing the partial magnetization profile via experimental tests at standstill and Finite Element Analysis simulations. The achieved results are compared with the reference obtained from an ideal measuring equipment (HysteresisGraph). The effects of a stator saturation and geometry as also the anisotropy shape are explored for justifying the differences observed. A following study focused on the magnetization under operation and the torque control is developed considering the an adapted sensorless algorithm. In this context, the present research proposes the use of a Proportional Integral Phase Locked-Loop for estimating the rotor position and speed. An attention is given to the offset angle compensation required for adjusting the mentioned position according to the acquisition system (active filters) and the characteristics of the estimation method used. A parametric sensitivity study allows the identification of the dq-axis inductances as the most critical parameters to an accurate correction angle estimation. For this reason, this research thesis is also interested in proposing a methodology to describe the d- and q-axis inductances from FEA simulations performed by considering the anisotropy effects of the magnet and also the saturation of the stator material. A variable reluctance is identified in the machine and its effect on the correction angle is studied
Actes de conférences sur le sujet "Standstill magnetization"
de Sousa, Flavia Domingues, Alexandre Battiston, Serge Pierfederici et Farid Meibody-Tabar. « Validation of the standstill magnetization strategy of a FeCrCo-based Variable Flux Memory Machine ». Dans 2021 24th International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2021. http://dx.doi.org/10.23919/icems52562.2021.9634323.
Texte intégralSun, Tao, Soon-O. Kwon, Jeong-Jong Lee, Geun-Ho Lee et Jung-Pyo Hong. « An improved AC standstill inductance test method for interior PM synchronous motor considering cross-magnetization effect ». Dans 2009 International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2009. http://dx.doi.org/10.1109/icems.2009.5382868.
Texte intégral