Permanent Magnet Machines for High-Speed Applications

He, T. R.; Zhu, Z. Q.; Eastham, Fred; Wang, Yu; Bao, Hong; Wu, Di; Gong, Liming; Chen, Jintao

doi:10.3390/wevj13010018

Cited by 36 publications

(12 citation statements)

References 120 publications

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“…In case of a motor designed for a very high rotational speed of the rotor (up to 60,000 rpm), it is very difficult to separate losses in the core from the overall losses (Krykowski et al , 2011; Kolano et al , 2016). Therefore, a new design of the motor was proposed, very different from typical designs of high-speed motors (He et al , 2022). The design is similar to spindle motors used in HDD (Samsung Electronics Co, 1998; Ishak et al , 2005).…”

Section: Stator and Rotor Prototype Structurementioning

confidence: 99%

Analysis of losses in the high-speed PM BLDC motor with open slot stator core made of amorphous soft magnetic material

Hreczka

Kolano

Kolano-Burian

et al. 2023

COMPEL

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Purpose The purpose of this paper is to verify results related to losses in the core of a brushless DC prototype motor, obtained using its computer FE models, by experimental tests on manufactured machines. The paper focuses on the comparison of losses in the core of a machine with a classical stator core made of an iron–silicon material (Fe–Si) and a new one made of a modern METGLAS material. Design/methodology/approach Computer models of the prototype motors were created using FEM. The designed machines were manufactured, and experimental tests were performed. To achieve high frequencies in rotating magnetic fields, motors with a stator to rotor pole ratio of 9/12 were built. Twin rotor approach was applied, as two identical rotors were built along the two geometrically identical stators made of different core materials. Findings Experimental studies have shown the superiority of the METGLAS material over the classical Fe–Si material. Material parameters were measured directly on the prepared cores as library data used in the simulation may be incorrect due to technological processes during core production, which was also verified. Problems related to twin rotor approach have been identified. Solution to the problem has been suggested. Necessity of 3D FEM modelling was identified. Originality/value The main source of originality is that METGLAS material used in the prototype machines was developed and manufactured by the authors themselves. Original approach to core parameter evaluation based on simplified methodology has been suggested. Another original part is a simplified methodology applied to loss measurement during no-load test.

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Section: Stator and Rotor Prototype Structurementioning

confidence: 99%

Analysis of losses in the high-speed PM BLDC motor with open slot stator core made of amorphous soft magnetic material

Hreczka

Kolano

Kolano-Burian

et al. 2023

COMPEL

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“…These can be realized with traditional laminated rotor construction. [2]. For higher surface speeds, induction machines (IM) with a solid rotor structure can be more feasible in practise [3].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Material Combinations for Axially-Laminated Synchronous Machine

Credo

Kurvinen

Petrov

et al. 2022

2022 International Conference on Electrical Machines (ICEM)

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High-speed electric machines are special types of electric machines which aim for compact, direct-driven highspeed applications and highly efficient operation, especially, when gearbox can be avoided. Design of these types of machines is highly iterative combining multiphysics optimization and leads to custom types of machines which fulfill the applicationspecific requirements. Synchronous Reluctance Machines (Syn-RMs) might have an axially-laminated solid rotor structure, which combines magnetic and non-magnetic layers rigidly bonded to each other by vacuum brazing, hot isostatic pressing, soldering, explosion welding or even by additive manufacturing. In the study five non-magnetic materials and nine magnetic materials are cross compared and the results show clear differences in performance, efficiency and physical properties of the rotor when made of different material combinations, and thereby can suggest the best pairs when application-specific performance criteria are known. The study is carried out on a 12 kW machine with a maximum speed of 24000 rpm.

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“…Other studies considered the use of high-speed machines to potentially achieve lower weight compared to a lowspeed electrical machine of the same power rating [15,16]. Eqbal et al [17] studied the effect of replacing the starter motor and gear of a turboprop with a high-speed electrical machine using a permanent magnet and achieved a 31% reduction in overall weight.…”

Section: Introductionmentioning

confidence: 99%

Design Factors of High- speed Turbo-electric Distributed Propulsion System

Eqbal

Marino

Fernando

et al. 2022

Preprint

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Turbo-electric Distributed Propulsion (TeDP) is a promising concept to achieve the operational goals of more electric aircraft. The application of TeDP architecture can achieve the desired weight reduction of an aircraft power system. The use of a superconducting machine is expected to provide the workaround for the weight issue, but its current state of technology has not yet been extensively tested for aircraft applications. Another more practical option is to directly couple the aircraft's propeller system to a high-speed permanent magnet (PM) electrical machine, eliminating the gear part that also contributes to the total weight. A critical part of the design for a high-speed PM machine is choosing the optimum magnet configurations. This study used finite element modelling to analyze the impact of scaling the PM’s critical parameters on the weight and machine speed. A prototype testing of a 2-KW high-speed machine, suitable for a Remotely Piloted Aircraft System (RPAS), was developed and tested. The results confirmed the following critical parameters that should be carefully designed to achieve the optimum output, such as the (a) number of winding turns, (b) stack length, (c) sleeve thickness, and (d) terminal voltage.

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Permanent Magnet Machines for High-Speed Applications

Cited by 36 publications

References 120 publications

Analysis of losses in the high-speed PM BLDC motor with open slot stator core made of amorphous soft magnetic material

Analysis of losses in the high-speed PM BLDC motor with open slot stator core made of amorphous soft magnetic material

Investigation of Material Combinations for Axially-Laminated Synchronous Machine

Design Factors of High- speed Turbo-electric Distributed Propulsion System

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