Design and evaluation of high-speed induction machine

Larsson, Martin; Johansson, Mikael; Naslund, L.; Hylander, Jonny

doi:10.1109/iemdc.2003.1211245

Cited by 13 publications

(5 citation statements)

References 1 publication

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“…Numerical methods [8], [9], [13], [21], [23]- [26], [29]- [31], [34]- [40] (finite elements in particular) are more frequently used when analysing general HSIMs. This has to do with their reliability and practicability which allows modelling from simple structures to more complex topologies.…”

Section: Electromagnetic Methods To Analyse Hsimsmentioning

confidence: 99%

“…The overall system efficiency is improved and the inverter drive systems are smaller by a half to a third of the original installation space [1]. There are two different ways in which the feasibility of IMs has been investigated for high-speed applications, by [20], [22]; even for simpler structures as in [23] where cutting of the machine laminations was done using EDM instead of water jet or laser cutting because the latter two resulted in lamination vibration.…”

Section: High-speed Induction Machinesmentioning

confidence: 99%

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Electromagnetic modelling of high speed induction motors

Velázquez¹,

Smith²

2016

8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)

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Improvement in the power density of induction machines can be achieved when they operate at high rotational speeds using frequency converters that provide a higher frequency supply to the motor. Applications such as compressors require intrinsically high-speed operation. In these cases the mechanical integrity is prioritized over the electromagnetic performance and solid rotors are normally used instead of laminated rotors so they can withstand the peripheral and radial stresses caused by the high speeds. Small skin depths are associated with solid rotor structures; this complicates the electromagnetic analysis when FE modelling is used because a fine mesh is typically required. Although analytical methods in general tend to be less accurate than FE models, they can provide faster and reasonably accurate results. This thesis evaluates the use of an analytical multi-layer model as a preliminary design tool for determining the electromagnetic performance of high-speed copper-coated solid rotors. A simple FE model is developed in order to validate the results obtained from the analytical model. The input to the analytical multi-layer and FE models is normally current; consequently they are modified to work with voltage as the input reference. The multi-layer model is compared under constant current operation and constant voltage operation. The limitations of the analytical multi-layer model are highlighted. Declaration 13 Declaration No portion of the work referred to in the thesis has been submitted in support of an application for another degree or qualification of this or any other university or other institute of learning.

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Section: Electromagnetic Methods To Analyse Hsimsmentioning

confidence: 99%

Section: High-speed Induction Machinesmentioning

confidence: 99%

Electromagnetic modelling of high speed induction motors

Velázquez¹,

Smith²

2016

8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)

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“…A drop bar shape has been used [7] to reduce the rotor losses but without giving an insight on the penalty incurred with respect to increasing the stresses in the lamination. In [1] it has been shown how the power density of a machine can be increased by using a drop-bar shape, at the expense of increasing the stress in the lamination.…”

Section: Introductionmentioning

confidence: 99%

“…High speed machines normally utilize round bar shapes [2], [3], [5]- [7] as this reduces the stresses on the lamination. A drop bar shape has been used [7] to reduce the rotor losses but without giving an insight on the penalty incurred with respect to increasing the stresses in the lamination.…”

Section: Introductionmentioning

confidence: 99%

Optimal split ratio for high speed induction machines

Gerada

Mebarki

Brown

et al. 2010

2010 IEEE Energy Conversion Congress and Exposition

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The split ratio of several types of electrical machines has been identified as an important optimisation parameter. While the optimisation of split ratio in high-speed permanent magnet, switched reluctance and flux-switching machines has been researched, this parameter has often been neglected in the design of high-speed induction machines. In this paper, using a described multi-domain design environment which puts equal weight on the electromagnetic, mechanical and thermal aspects, the rotor split ratio together with the rotor slot shape and electric and magnetic loadings are identified as important and sensitive parameters in the design of high speed, high power density laminated-rotor induction machines. This is shown using a design case study which involves improving the power density of an existing 10kW, 75kpm laminated rotor induction machine.

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“…This is because they maximize the lateral stiffness of the rotor [9]. To avoid mechanical problems, it is important to calculate the shaft diameter carefully.…”

Section: Critical Speedmentioning

confidence: 99%

Basic Design of Bearingless Switched Reluctance Motor with Hybrid Stator poles

Wang¹,

Liu²,

Ahn³

2012

Journal of international Conference on Electrical Machines and

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-In this paper, a novel bearingless switched reluctance motor (BLSRM) with hybrid stator poles is proposed. The structure and operating principle are presented. In order to describe the design methodology clearly, analytical torque and radial force models are established. Further, basic design procedure is described. The numbers of phases and poles have important influence on the selection of structure. These effects, along with sizing of machine envelope and internal dimensions, make the machine design an insight-intensive effort. Effect of pole arcs and air-gap length on the production of torque and radial force are analyzed in detail. Mechanical design factors such as hoop stress and first critical speed are also considered. Based on the above analysis, the characteristics of the proposed BLSRM are analyzed. A prototype motor is designed and manufactured. The validity of the proposed structure is verified by the experimental results.

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Design and evaluation of high-speed induction machine

Cited by 13 publications

References 1 publication

Electromagnetic modelling of high speed induction motors

Electromagnetic modelling of high speed induction motors

Optimal split ratio for high speed induction machines

Basic Design of Bearingless Switched Reluctance Motor with Hybrid Stator poles

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