Reliability analysis of a direct-liquid cooling system of direct drive permanent magnet synchronous generator

Polikarpova, M.; Semken, Scott; Pyrhönen, Juha

doi:10.1109/rams.2013.6517682

Cited by 11 publications

(10 citation statements)

References 7 publications

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“…In light of this some novel cooling methods targeting directly the heat directly inside the slot have been proposed. As described in [12][13][14][15][16][17], slot water jacket cooling provides an efficient way to reduce the winding hot spot temperature, albeit the copper losses are increased due to the space occupied by the slot jacket. Moreover due to electrical conductivity of water, it is imperative that sealing is ensured within such a configuration.…”

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confidence: 99%

Back-Iron Extension Thermal Benefits for Electrical Machines With Concentrated Windings

Zhang

Gerada

et al. 2020

IEEE Trans. Ind. Electron.

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This paper proposes a novel, low-cost, effective way to improve the thermal performance of electrical machines by extending a part of the back-iron into the slot. This modification helps in reducing the thermal resistance path from the center of the slot to the coolant, however its thermal benefits must be clearly evaluated in conjunction with the electromagnetic aspects, due to the higher iron losses and flux-leakage, and furthermore such an extension occupies space which would otherwise be allocated to the copper itself. Taking a case study involving an existing 75kW electric vehicle (EV) traction motor, the tradeoffs involving the losses, fluxleakage, output torque, torque-quality and the peak winding temperature with back-iron extension (BIE) and without are compared. Finally, experimental segments of the aforesaid motor are tested, verifying a significant 26.7% peak winding temperature reduction for the same output power with the proposed modification. Index Terms-Thermal management, machine cooling, power density, thermal analysis, thermal resistance network, slot cooling I. INTRODUCTION ITH the increasingly stringent emissions legislations, there is an unprecedented demand for transport electrification, be it for rail, marine, aerospace or automotive. For some applications this involves hybridization of the conventional engine-based systems, while for other applications all-electric architectures are developed [1, 2]. The core component in these electrified architectures is the electrical machine, and hence its performance improvement merits detailed research in order to achieve important

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confidence: 99%

Back-Iron Extension Thermal Benefits for Electrical Machines With Concentrated Windings

Zhang

Gerada

et al. 2020

IEEE Trans. Ind. Electron.

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“…This method consists of the hollow stator bars, phase connection rings, main leads, bushings, and neutral bus, that deionized water or oil past the hollow passages to remove the high temperature directly from the stator windings [63] and [64]. These types of cooling are mostly implemented on large synchronous machines [65], [66], and [67]. However, developing the AM method allows the designer to implement this thermal management system for small machines [68].…”

Section: ) Additive Manufacture Direct Liquid Cooling Windingmentioning

confidence: 99%

Opportunities and Challenges of Utilizing Additive Manufacturing Approaches in Thermal Management of Electrical Machines

et al. 2021

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The additive manufacturing approach is considered a new manufacturing technology method and is evolving dynamically in recent years. It is advancing and achieving as the key enabling technology in a wide range of applications, from medical sciences to the aerospace and automotive industries. This novel approach opens a new path to overcome the conventional manufacturing problems and challenges by providing more design freedom, new ranges of materials, lightweight and complex geometries. According to demands metrics such as lightweight and high power density motors. This offers clear motivation to develop the advanced thermal management method with new materials and a novel additive manufacturing (AM) approach. The paper aims to provide a comprehensive review of all the attempts in various electrical machines' thermal management methods using AM method. It considers the opportunities and challenges that designers are facing while implementing these approaches. Finally, the authors make some comments/forecasts on how the AM could improve the performance and manufacturability of the future thermal management system of electrical machines INDEX TERMS Additive manufacturing (AM), cooling systems, electrical machine, manufacturing techniques, thermal management, three-dimensional (3-D) printing, traction motors.

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“…Performance comparisons of the PMs under different temperatures have been carried out in [6]. Different cooling strategies have been proposed for various designs of these machines involving liquid and forced-air cooling [7][8][9]. Reliability and the application of the cooling systems has been studied in [10,11].…”

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confidence: 99%

Comparative Thermal and Demagnetization Analysis of the PM Machines with Neodymium and Ferrite Magnets

et al. 2022

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This paper provides computer analysis and experiential investigation of the permanent magnet machines with neodymium and ferrite permanent magnets to discuss the feasibility of utilizing induction machines-oriented equipment for PM machine production. For this purpose, the machines are obtained by replacing the squirrel-cage rotor of the induction motor with the flux-focusing (tangential) and surface-mounted (radial) permanent magnet rotors. Electromechanical parameters of the machines as electromagnetic torque and output power are discussed and compared. The temperatures of the neodymium and ferrite magnets are also calculated at rated current, and short circuit scenarios and the performance of two different cooling systems in minimizing the temperature effect on the machines are investigated. Furthermore, the demagnetization of permanent magnets at various load conditions is also studied. Finally, the results of the computer modeling are validated by the physical prototypes of the machines. The characteristics of the electrical machines under study were calculated using the Simcenter MagNet and Simcenter MotorSolve software packages.

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Reliability analysis of a direct-liquid cooling system of direct drive permanent magnet synchronous generator

Cited by 11 publications

References 7 publications

Back-Iron Extension Thermal Benefits for Electrical Machines With Concentrated Windings

Back-Iron Extension Thermal Benefits for Electrical Machines With Concentrated Windings

Opportunities and Challenges of Utilizing Additive Manufacturing Approaches in Thermal Management of Electrical Machines

Comparative Thermal and Demagnetization Analysis of the PM Machines with Neodymium and Ferrite Magnets

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