Losses in High Speed Permanent Magnet Machines Used in Microturbine Applications

Huynh, Co; Zheng, Ling; Acharya, Dipjyoti

doi:10.1115/1.2982151

Cited by 86 publications

(46 citation statements)

References 8 publications

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“…Estas pérdidas varían con f 2 , lo que obliga a utilizar conductores trenzados o conductores tipo Litz en las aplicaciones de alta velocidad de rotación (Reddy et al, 2009). Las pérdidas en el hierro, (magnéticas), en su conjunto, considerando las pérdidas por histéresis, por corrientes parásitas y las adicionales, varían aproximadamente con el producto del cuadrado de la inducción magnética y el cuadrado de la frecuencia, (B 2 ·f 2 ) (Huynh et al, 2009). Esta circunstancia obliga a utilizar, en las aplicaciones de alta velocidad de rotación, chapa magnética de muy bajas pérdidas específicas en el hierro y de pequeño espesor o materiales magnéticos especiales (Fernando et al, 2016).…”

Section: Pérdidasunclassified

Generadores Síncronos de Alta Velocidad: Una Evaluación Crítica

Martínez

Andrada

2017

Inf. tecnol.

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ResumenConsiderando que existen restricciones electromagnéticas, mecánicas y térmicas que condicionan el diseño de las máquinas eléctricas de alta velocidad, se establecen los criterios que conducen a una adecuada selección de la máquina. Además, teniendo en cuenta el estado actual de la tecnología, se presentan los valores críticos en la relación (potencia de salida)/(velocidad de rotación). El artículo se centra en los generadores síncronos de alta velocidad, especialmente en los generadores con imanes permanentes, los alternadores inductores y los alternadores con conmutación de flujo, haciendo hincapié en sus fundamentos constructivos y en sus ventajas e inconvenientes. El análisis se completa con una evaluación crítica que los clasifica, de acuerdo con unos requisitos previamente definidos. Aunque la decisión de la elección final está muy condicionada por la aplicación de interés, puede afirmarse que, en general, los generadores síncronos con imanes permanentes en el rotor constituyen la mejor opción. Palabras clave: máquinas eléctricas de alta velocidad; generadores síncronos; alta frecuencia; alternadores inductores High-Speed Synchronous Generators. A Critical Assessment AbstractConsidering that there are electromagnetic, mechanical and thermal constraints that determine the design of high-speed electrical machines, the criteria that lead to adequate selection of the machine are established in this work. Moreover, taking into account the current state of technology, the critical values in the ratio (output power)/(rotation speed), are presented. The paper focuses on the high-speed synchronous generators, especially in permanent magnet generators, inductor alternators and flux switching alternators, emphasizing their constructive fundamentals and their advantages and disadvantages. The analysis is completed with a critical assessment that classifies them according to previously defined requirements. Although the decision of the final choice is largely determined by the application of interest, it can be said that, in general, synchronous generators with permanent magnets in the rotor are the best option.

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Section: Pérdidasunclassified

Generadores Síncronos de Alta Velocidad: Una Evaluación Crítica

Martínez

Andrada

2017

Inf. tecnol.

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“…According to [7], the friction loss on the rotor outer surface is determined as 466 W. Besides, with the electromagnetic losses obtained from the above analyses, the loss distribution in HSPMG under rated operating is determined, as shown in Table III, are the distributed heat generation sources. …”

Section: A Electromagnetic Analysis and Loss Determinationmentioning

confidence: 99%

Thermal investigation on HSPM with new alloy sleeve

Zhang

Zhang³

et al. 2017

2017 20th International Conference on Electrical Machines and Systems (ICEMS)

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Abstract--This paper presents a developed copper-iron alloy which made as the rotor sleeve in a high speed permanent magnetic machine (HSPMG), whist investigating its benefits in improve machine thermal performance. The features of the new alloy is experimental tested against the performance, which includes the conductivity, the permeability, and thermal conductivity, and the variation of loss distribution inside machine with sleeve conductivity and permeability are studied. A fluid-thermal coupled analysis model is proposed, by using which the fluid velocity and temperature distribution are obtained via numerical analyzing. The variations of machine operating temperature with new material are evaluated.

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“…Therefore, research on the reduction of losses in HSEMPM has been widely discussed [13][14][15][16][17][18][19][20][21][22]. Papers of Borisavljevica et al, Munteanu et al, and others provide general approaches to the HSEMPM loss analysis, losses in the rotor permanent magnets are studied, as well as aerodynamic losses, and losses in HSEMPM winding [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Improving the Efficiency of Electrical High-RPM Generators With Permanent Magnets and Tooth Winding

Исмагилов¹,

Vavilov²,

Karimov³

2018

PIER M

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Abstract-This paper solves the problem of minimizing losses in the stator magnetic core of high-speed electric machines with the use of amorphous iron. A fundamentally new technology for manufacturing of a stator magnetic core from segments of amorphous steel is developed by the authors. The feature of the new stator design is the possibility to use technological ducts located inside the stator as cooling ducts. This aspect significantly improves the heat dissipation from the active zone of the stator and, accordingly, minimizing temperature. The efficiency of this solution was studied using two power generators of 100 kW and 200 kW and rotational speeds of 60,000 rpm and 45,000 rpm respectively in the software complex Ansys Maxwell. Harmonic compositions of currents and voltages, flux density distributions in active elements of the generator in various operating modes were studied: under load, in a three-phase short-circuit and at idle. Also, the obtained data were compared with analogous models of an electrogenerator made of electrical steel. The results of the study showed the operability and effectiveness of the proposed technology. Based on the results of the research, a prototype of the stator magnetic core made from amorphous iron was created. Losses in the generator were experimentally measured. Also the results of experimental studies of aerodynamic losses are presented.

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Losses in High Speed Permanent Magnet Machines Used in Microturbine Applications

Cited by 86 publications

References 8 publications

Generadores Síncronos de Alta Velocidad: Una Evaluación Crítica

Generadores Síncronos de Alta Velocidad: Una Evaluación Crítica

Thermal investigation on HSPM with new alloy sleeve

Improving the Efficiency of Electrical High-RPM Generators With Permanent Magnets and Tooth Winding

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