Permanent magnet synchronous reluctance machine - bridge design for two-layer applications

Rick, Sebastian; Felden, Matthias; Hombitzer, Marco; Hameyer, Kay

doi:10.1109/iemdc.2013.6556316

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…To this end a multi flux barrier structure is applied in the rotor [9], with the flux barriers perpendicular to the flux lines. The flux barriers guide the flux through the desired paths, that is, whereas the q-axis flux is blocked by the flux barriers, the d-axis flux is guided through an iron path [105]. This design strategy, jointly with the use of axially-laminated (ALA) rotors, allows obtaining a reasonably small L q inductance due to the large air gap path [104].…”

Section: Synchronous Reluctance Motor (Synrm)mentioning

confidence: 99%

Rare-earth-free propulsion motors for electric vehicles: A technology review

Riba

López-Torres

Romeral

et al. 2016

Renewable and Sustainable Energy Reviews

211

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Several factors including fossil fuels scarcity, prices volatility, greenhouse gas emissions or current pollution levels in metropolitan areas are forcing the development of greener transportation systems based on more efficient electric and hybrid vehicles. Most of the current hybrid electric vehicles use electric motors containing powerful rare-earth permanent magnets. However, both private companies and estates are aware of possible future shortages, price uncertainty and geographical concentration of some critical rare-earth elements needed to manufacture such magnets. Therefore, there is a growing interest in developing electric motors for vehicular propulsion systems without rare-earth permanent magnets. In this paper this problematic is addressed and the state-of-the-art of the electric motor technologies for vehicular propulsion systems is reviewed, where the features required, design considerations and restrictions are addressed.

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Section: Synchronous Reluctance Motor (Synrm)mentioning

confidence: 99%

Rare-earth-free propulsion motors for electric vehicles: A technology review

Riba

López-Torres

Romeral

et al. 2016

Renewable and Sustainable Energy Reviews

211

View full text Add to dashboard Cite

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“…Various authors conducted recent studies on topics related to PMSynRM machines: rotor design [6][7][8], usage of ferrite [9]o r NdFeB magnets [10], flux weakening (FW) performance [11], rotor bridge design [12], acoustic behaviour [13] and so on.…”

Section: Introductionmentioning

confidence: 99%

Optimised design of permanent magnet assisted synchronous reluctance motor series using combined analytical–finite element analysis based approach

Stipetić

Žarko

Kovačić

2016

IET Electric Power Applications

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This paper presents a comprehensive approach to design of series of permanent magnet assisted synchronous reluctance motors using combined analytical and finite element calculations. A global optimization metaheuristic algorithm (Differential Evolution) is utilized in order to achieve optimal design in terms of maximum torque per volume with numerous specific boundaries imposed on motor geometry and performance. A novel approach to calculation of the specified constant power speed range and demagnetization effect in sudden symmetrical short circuit using iterative finite element magnetostatic simulations is presented. Based on the results of optimized design, a 100 kW prototype was built and tested. 7. β/β 0-angle of the slanted magnet relative to the maximum allowed angle of the slanted magnet (β 0 = 0.5π(1 − 1/p)), 8. λp-angular span of the inner cavity relative to the pole pitch. Lower and upper boundary constraints of the variables are: 0.45 ≤Ds/Dout ≤ 0.75, 0.2 ≤hys/[(Dout − Ds)/2] ≤ 0.6, 0.3 ≤bt/τu ≤ 0.7, 0.05 ≤λm ≤ 0.5, 0.2 ≤λ md1 ≤ 0.6, 0.05 ≤λ md2 ≤ 0.4, 0.5 ≤β/β 0 ≤ 1.0, 0.75 ≤λp ≤ 0.95. Variables with constant value, i.e. design parameters that do not change during the optimization procedure (preset parameters) according to Fig. 1 are: 1. δ = 0.8 mm-air-gap length,

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“…To this end a multi flux barrier structure is applied in the rotor [36], with the flux barriers perpendicular to the flux lines. The flux barriers guide the flux through the desired paths, that is, whereas the q-axis flux is blocked by the flux barriers, the d-axis flux is guided through an iron path [53]. This design strategy, jointly with the use of axially-laminated (ALA) rotors, allows obtaining a reasonably small Lq inductance due to the large air gap path [54].…”

Section: Synchronous Reluctance Motors (Synrm)mentioning

confidence: 99%

Analysis and implementation of a methodology for optimal PMa-SynRM design taking into account performances and reliability

Torres¹

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Automotive applications focus to develop drive-train technologies with higher energy efficiency and lower environmental impact. Electric and hybrid vehicles are gaining popularity since they fulfill these requirements . The aim of optimal motor design is to achieve high torque and power densities, wider speed range and high efficiency within the area defining the most frequent operating points. This work presents a methodology to optimize electric motors for traction applications considering a multi-physics approach. The magnetic behavior is evaluated using a complex reluctance networks capable to compute the cross-coupling. The results of the magnetic model are the inductances, iron losses, and magnet flux linkage. The thermal behavior is evaluated using a thermal network and it is coupled with the magnetic model. The electric model is feed with the solution of the thermal and magnetic model. The electric model aims to calculate the whole operating area of the motor to allow optimizing the machine considering the most frequent operating zone. Therefore, a fast tool to evaluate different variables within the torque-speed map is convenient for this purpose. In this context, starting from a preliminary motor design, and taking into account motor cross-coupling effects and power losses, this thesis presents a new methodology for optimizing and evaluating the behavior of permanent magnet machines, such as synchronous reluctance machines, and permanent magnet assisted synchronous reluctance machines, in all operational points. Apart from the torque and efficiency, many other electrical variables can be obtained, such as the current space vector angle, power factor or electrical power among others. The proposed methodology also allows optimizing the design of the machine under a preestablished control law; thus obtaining the current set point trajectory in the dq frame and allowing a fast and accurate evaluation of motor performance.The results obtained by means of the proposed simulation tool are compared against finite element analysis simulations and experimental data, thus validating the usefulness and accuracy of the proposed methodology. El sector de la automoción se está centrando en las tecnologías con alta eficiencia y un bajo impacto medioambiental. En este sentido el desarrollo de vehiculos eléctricos o hibridos está ganando importancia en este sector. Por lo tanto, el diseño de motores eléctricos que cumplan las especificaciones necesarias para aplicaciones de tracción eléctrica es un punto de especial interés . El principal objetivo en la optimización de motores eléctricos es conseguir altas densidades de par o potencia, alta eficiencia y un buen factor de potencia, teniendo en cuenta la zona de trabajo más común. Este trabajo presenta una metodologia para optimización de motores eléctricos, concretamente motores de reluctancia síncrona, para aplicaciones de tracción eléctrica. Para ello es necesario crear diferentes modelos para evaluar el comportamiento eléctrico, térmico y magnético del motor así como calcular los diferentes puntos de trabajo. El modelo magnético, que está basado en redes de reluctancia, permite calcular las inductancias, el flujo magnético del imán y las pérdidas en el hierro teniendo en cuenta la saturación cruzada. El modelo térmico estará basado en redes térmicas y permite evaluar la temperatura de diferentes partes del motor (dientes, bobinado, cabezas de bobina o imanes) para evaluar la viabilidad de estos motores y definir bien el valor de algunos parámetros como la resistencia del bobinado y las propiedades magnéticas del imán. El modelo eléctrico está basado en la resolución de las ecuaciones completas del motor en los ejes dq, los parámetros necesarios (inductancias, resistencia, perdidas en el hierro, flujo del imán) serán obtenidos en los modelos magnético y térmico. En este punto, la metodología propuesta es capaz de calcular todos los puntos de operación de la máquina. Hay que remarcar que en este punto se puede calcular la eficiencia, factor de potencia, ángulo de corriente. La tesis propuesta empezará el proceso diseño optimizado del motor calculando un pre-diseño para introducirlo en un optimizador que usará los mapas calculados para evaluar su función de coste teniendo en cuenta que estos mapas estarán obtenidos considerando saturación cruzada, perdidas en el hierro y variaciones de temperatura, se puede afirmar que el motor resultante está evaluado en todos sus dominios exceptuando el mecánico. Para el análisis mecánico se propone un estudio en elementos finitos posterior a la optimización. En este análisis se podrán introducir estructuras que mejoren la resistencia mecánica del motor y que serán restricciones para una nueva optimización. Una vez cerrado el proceso iterativo entre optimización y análisis mecánico se tendria el motor final. En la tesis propuesta se usa esta metodologia para diseñar varios motores, con lo cual se permite la validación de la misma.

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Permanent magnet synchronous reluctance machine - bridge design for two-layer applications

Cited by 6 publications

References 21 publications

Rare-earth-free propulsion motors for electric vehicles: A technology review

Rare-earth-free propulsion motors for electric vehicles: A technology review

Optimised design of permanent magnet assisted synchronous reluctance motor series using combined analytical–finite element analysis based approach

Analysis and implementation of a methodology for optimal PMa-SynRM design taking into account performances and reliability

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