Electromagnetic Design and Loss Calculations of a 1.12-MW High-Speed Permanent-Magnet Motor for Compressor Applications

Zhang, Fengge; Du, Guanghui; Wang, Tianyu; Wang, Fengxiang; Cao, Wenping; Kirtley, James L.

doi:10.1109/tec.2015.2488841

Cited by 75 publications

(41 citation statements)

References 19 publications

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“…The only difference among the variables was the setting condition of Γ, S, initial values, and boundary conditions. The specific expressions of Γ, S for different variables were provided in [16]. In addition, for the solid components in the motor, the energy equation was converted into the heat conduction differential equation due to the no convection item.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…They discussed the effect of leakages in terms of static and dynamic stiffness. Zhang and Kirtely et al [16] investigated and predicted the power losses including core losses, winding losses, and air-friction losses. The effects of friction loss in electric machines were often neglected in past research; however, in recent years, the friction loss has been considered one of the important factors that might affect the bearing life of the canned motor and account for the percentage of fly wheel loss of the motor due to the increased rotational speeds.…”

Section: Introductionmentioning

confidence: 99%

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The Effects of Water Friction Loss Calculation on the Thermal Field of the Canned Motor

Mustafa²,

Rehan³

et al. 2019

Processes

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The thermal behavior of a canned motor also depends on the losses and the cooling capability, and these losses cause an increase in the temperature of the stator winding. This paper focuses on the modeling and simulation of the thermal fields of the large canned induction motor by different calculation methods of water friction loss. The values of water friction losses are set as heat sources in the corresponding clearance of water at different positions along the duct and are calculated by the analytical method, loss separation test method, and by assuming the values that may be larger than the experimental results and at zero. Based on Finite volume method (FVM), 3D turbulent flow and heat transfer equations of the canned motor are solve numerically to obtain the temperature distributions of different parts of the motor. The analysis results of water friction loss are compared with the measurements, obtained from the total losses using the loss separation method. The results show that the magnitude of water friction loss within various parts of the motor does not affect the position of peak temperature and the tendency of the temperature distribution of windings. This paper is highly significant for the design of cooling structures of electrical machines.

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effects of Water Friction Loss Calculation on the Thermal Field of the Canned Motor

Mustafa²,

Rehan³

et al. 2019

Processes

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“…With the same material for the stator, the power density of case 2 was lower than case 1, while case 3 was lower than case 4, due to the increased mass of the outer teeth for the cases with toroidal windings. In contrast, the power density of a similar high-speed PMSM of a 1.12 MW, 18,000 rpm was 1.4 kW/kg (6). Consequently, four poles and toroidal windings were chosen for the prototype.…”

Section: Windingsmentioning

confidence: 99%

“…Nowadays surface-mounted PMSMs are increasingly used for high-speed applications, because of the merits of simple structure and high-strength of the rotor [4,5]. The number of poles is usually designed as two or four to reduce the iron losses at high operating frequency [6]. With conventional lap windings, the overlong axial length of the end windings is unavoidable for motors of a small number of poles.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Design and Losses Analysis of a High-Speed Permanent Magnet Synchronous Motor with Toroidal Windings for Pulsed Alternator

Wan

Cui

et al. 2018

Energies

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The configuration of conventional high-speed Permanent Magnet Synchronous Motors (PMSMs) is usually long and thin, with overlong axial end winding lengths, which is not suitable for those applications that place severe restrictions on the axial length, such as pulsed alternators. This paper first studied the key design aspects of a flat-structure high-speed PMSM. The toroidalwindings, low-conductivity material of the retaining sleeve, large airgap and segmentation of magnets were studied to reduce the axial length of the motor. The division of the stator and the employment of a non-magnetic outer stator were used to improve overall performance. Then the losses of the prototype were calculated and the factors having an influence on the losses were also investigated, after which, their effects on the total loss were evaluated. The total loss could be effectively reduced by the decrease of strand number of conductors and the division of stator, while only being slightly reduced by epoxy resin pole fillers. Metal-stack pole fillers have the same effect on the reduction of rotor loss as epoxy resin, while maintaining the good thermal-conductivity of metal. In addition, the influence of the carrier frequency of the inverter on the losses was analyzed, and it was found that high carrier frequency was helpful to reduce rotor losses. Finally, a small-scale prototype was manufactured and the experimental results were provided.

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“…En los últimos años se han realizado importantes aportaciones al estudio de las máquinas de alta velocidad de rotación, en aplicaciones industriales para accionamientos de turbocompresores (Zhang et al, 2016), bombas centrífugas y de vacío (Huang y Fang, 2016), y máquinas herramientas (Gieras, 2014). También han tenido un importante impacto en el ámbito de la generación eléctrica, especialmente en la generación distribuida con microturbinas (Zwissig et al, 2009), (Figura 1), en alternadores para aeronaves (Lahne et al, 2016), en volantes de inercia para almacenamiento de energía (Kumar et al, 2016), en el lanzamiento y guiado de misiles (McNab, 2015) y en armamento basado en energía electromagnética dirigida (Gieras, 2012).…”

Section: Introductionunclassified

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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Electromagnetic Design and Loss Calculations of a 1.12-MW High-Speed Permanent-Magnet Motor for Compressor Applications

Cited by 75 publications

References 19 publications

The Effects of Water Friction Loss Calculation on the Thermal Field of the Canned Motor

The Effects of Water Friction Loss Calculation on the Thermal Field of the Canned Motor

Electromagnetic Design and Losses Analysis of a High-Speed Permanent Magnet Synchronous Motor with Toroidal Windings for Pulsed Alternator

Generadores Síncronos de Alta Velocidad: Una Evaluación Crítica

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