Permanent magnet design for magnetic heat pumps using total cost minimization

Teyber, Reed; Trevizoli, Paulo V.; Christiaanse, T.V.; Govindappa, P.; Niknia, I.; Rowe, Andrew

doi:10.1016/j.jmmm.2017.06.039

Cited by 40 publications

(16 citation statements)

References 54 publications

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“…In the case of a superconducting magnets or electromagnets, they mostly consist of a variable magnetic field with linear movement of the magnetocaloric material. Whereas the magnetic field source is a crucial part of a magnetocaloric device, it is also the heaviest and most expensive part . The first review on magnetic field sources for magnetocaloric refrigeration and heat pumping was presented by Bjørk et al in 2010 .…”

Section: Magnetocaloric Refrigeration and Heat Pumpingmentioning

confidence: 99%

Energy Applications of Magnetocaloric Materials

Kitanovski

2020

Advanced Energy Materials

377

156

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The need for energy‐efficient and environmentally friendly refrigeration, heat pumping, air conditioning, and thermal energy harvesting systems is currently more urgent than ever. Magnetocaloric energy conversion is among the best available alternatives for achieving these technological goals and has been the subject of substantial basic and applied research over the last two decades. The subject is strongly interdisciplinary, requiring proper understanding and efficient integration of knowledge in different specialized fields. This review article presents a historical and up‐to‐date account of the energy‐related applications of magnetocaloric materials and information about their processing and magnetic fields, thermodynamics, heat transfer, and other relevant characteristics. The article also discusses the conceptual design of magnetocaloric refrigeration and power generation systems and some guidelines for future research in the field.

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Section: Magnetocaloric Refrigeration and Heat Pumpingmentioning

confidence: 99%

Energy Applications of Magnetocaloric Materials

Kitanovski

2020

Advanced Energy Materials

377

156

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“…The exponential function in (4) is introduced to relax a discontinuous function for discrete material states (i.e., iron or coil) into the continuous function. Here, the continuous function is required to apply a gradient-based optimization algorithm; refer to interpolation functions in topology optimization to control material states in [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The proposed interpolation functions in (3) and (4) could determine the number of coil turns together with the material state.…”

Section: Optimization Strategymentioning

confidence: 99%

“…The structural optimization of permanent magnet material was studied in [9][10][11][12] to determine the optimal magnet shape and magnetization directions. In [13][14][15][16][17], both iron and permanent magnet materials were simultaneously designed using structural optimization techniques. In [18,19], all three device components (i.e., iron, permanent magnet, and coil) were co-designed for maximizing the magnetic force of electromagnetic actuators.…”

Section: Introductionmentioning

confidence: 99%

“…In [18,19], all three device components (i.e., iron, permanent magnet, and coil) were co-designed for maximizing the magnetic force of electromagnetic actuators. While the structural optimization techniques [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] are certain to be an efficient approach for enhancing the magnetic force of electromechanical devices, they have a limitation that the magnetic field distribution is indirectly handled through optimizing the shape and configuration of the device components.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Force Enhancement Using Air-Gap Magnetic Field Manipulation by Optimized Coil Currents

Lee

2019

Applied Sciences

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This paper presents an air-gap magnetic field manipulation by optimized coil currents for a magnetic force enhancement in electromechanical devices. The external coil is designed near the device air-gap for manipulating the magnetic field distribution. The distribution of external coil currents is then optimized for maximizing the magnetic force in the tangential direction to the air-gap line. For the optimization, the design domain near air-gap is divided into small areas, and design variables are assigned at each small design area. The design variables determines not only the strength of coil current density (i.e., number of coil turns) but also whether the material state is coil or iron. In a benchmark actuator example, it is shown that 11.12% force enhancement is available by manipulating the air-gap magnetic field distribution using the optimized coil current. By investigating the magnetic field distribution, it is confirmed that the optimized coil current manipulated the magnetic field, forwarding a focused and inclined distribution that is an ideal distribution for maximizing the magnetic force.

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“…This is because diodes have characteristics that only pass electric current in one direction and inhibit electric current from the opposite direction. If a Diode is alternating current (AC), then the Diode will only pass half the wave, while the half wave will be blocked [11]. Full Wave Rectifier using 4 Diodes is a type of Rectifier that is most often used in a Power Supply circuit because it provides better performance than other types of rectifiers [12].…”

Section: Comparison Of Stator Windings On Permanent Magnet Generatorsmentioning

confidence: 99%

Comparison of Stator Windings on Permanent Magnet Generators for Horizontal Axis Wind Turbine (Hawt)

Winarno

Haryo

Widodo

et al. 2019

JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science)

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The generator is the main component for a wind power plant. The Horizontal Axis Wind Turbine (HAWT) is one of electric power plants types which has a horizontal axis. The plant is suitable to be operated in areas that have a fairly large wind speed. The low-speed HAWT generator can be designed using a permanent magnet. This paper compares the coil design of the stator generator which has 12 poles arranged in 3 phases, and the rotor part consists of 24 Neodymium (NdFeB) type permanent magnets. Based on analytical studies, the design of generator windings is varied by 3 turns and 6 turns. The tests has been carried out for 100rpm-1000rpm generator rotation. The research conclusions are recommendations to reduce 0.5 times the rotation and at 3 times the winding in obtaining optimal performance.

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Permanent magnet design for magnetic heat pumps using total cost minimization

Cited by 40 publications

References 54 publications

Energy Applications of Magnetocaloric Materials

Energy Applications of Magnetocaloric Materials

Magnetic Force Enhancement Using Air-Gap Magnetic Field Manipulation by Optimized Coil Currents

Comparison of Stator Windings on Permanent Magnet Generators for Horizontal Axis Wind Turbine (Hawt)

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