Design of Rotating Electrical Machines

Pyrhönen, Juha; Jokinen, T.; Hrabovcová, Valéria

doi:10.1002/9780470740095

Cited by 896 publications

(356 citation statements)

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“…Like the SynRM, the PM synchronous machine is synchronous with the stator field and contains no rotor conductors [24]. Hence the rotor loss is much less than the IM (at low speed), however, the machine does typically contain expensive permanent magnets, which are lossy in their own way (eddy current losses in magnet surfaces).…”

Section: -Permanent Magnet Motor Comparisonmentioning

confidence: 99%

“…The majority of the undesirable characteristics can be attributed to the fact that the windings are of the polyphase distributed winding type, where a coil typically spans one rotor pole pitch [24]. This winding is very common in all AC machine types but typically leads to a large amount of copper in the end region (up to around 25% of total coil length) and due to the distributed placement of the coils and the laborious winding procedure it -often requires skilled operators.…”

Section:  Laborious Winding Process (Increased Manufacturing Cost)mentioning

confidence: 99%

“…For arguments sake, if we take the average induction motor used for plant in a typical factory as 30kW and 24 that the average load is 80% of peak load with an energy cost of £0.10/kWh -consider an IE4…”

Section: General Energy Savingsmentioning

confidence: 99%

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Synchronous reluctance motor technology: industrial opportunities, challenges and future direction

Donaghy‐Spargo

2016

Engineering &Amp; Technology Reference

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract: In recent years, the desire for high efficiency and high torque density electric motors without permanent magnet materials for the industrial, as well as the specialist product sectors, has increased significantly and has developed into hot research topic. This paper discusses a reemergent type of AC electrical machine, the Synchronous Reluctance Machine. Current EU legislation aims to tackle global energy usage and reduce greenhouse gas emissions, the Synchronous Reluctance motor is discussed in this context -Its potential to become the future industry standard for high efficiency, low cost, high output industrial drives for fan, pump and mill type industrial applications is explored. The reader will be brought up to speed with Synchronous Reluctance technology, presented with both its advantages and disadvantages with the suitability of the technology for industry application being discussed and a comparison made with respect to competing technologies -the traditional induction machine and the modern permanent magnet machine. Current and future research trends are outlined and a simple engineering case study is also presented as an indication of the energy saving potential of this type of machine. This paper aims to inform students, engineers and key-decision makers in industry about this exciting technology.

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Section: -Permanent Magnet Motor Comparisonmentioning

confidence: 99%

Section:  Laborious Winding Process (Increased Manufacturing Cost)mentioning

confidence: 99%

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Synchronous reluctance motor technology: industrial opportunities, challenges and future direction

Donaghy‐Spargo

2016

Engineering &Amp; Technology Reference

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“…Additionally, long end windings require increase of the axial length of the machine, which in some high-speed machines can be even twice the length of the stack [24]. In order to reduce the amount of copper and improve harmonic performance, coils in this windings are often short-pitched [25]. Additionally, for the reduction of the harmonic content of the stator MMF conductors are often distributed in several adjacent slots, if sufficient number of slots is available.…”

Section: A Winding Topologiesmentioning

confidence: 99%

Comparative analysis of rotor losses in high-speed permanent magnet machines with different winding configurations considering the influence of the inverter PWM

Merdzan

Paulides

Lomonova

2015

2015 Tenth International Conference on Ecological Vehicles and Renewable Energies (EVER)

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. (2015). Comparative analysis of rotor losses in high-speed permanent magnet machines with different winding configurations considering the influence of the inverter PWM. In Proceedings of the 10th IEEE International Conference on Ecological Vehicles and Renewable Energies (EVER 2015), March 31 -April 2, 2015. Piscataway: Institute of Electrical and Electronics Engineers (IEEE). General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract-Due to development in fields of materials and power electronics, use of high-speed electrical machines has boosted significantly in recent decades. They are widely used in number of applications, such as electrically assisted turbochargers, flywheel energy storage systems, spindle applications, turbo molecular pumps, micro gas turbines. In applications where high efficiency and high power density are required, the most suitable machine type for high-speed operations is a permanent magnet (PM) machine. In this paper the performance of several different topologies of high-speed PM machines required for use in a micro-gas turbine application are evaluated. Different winding topologies, retaining sleeve materials and magnetization patterns are considered, where the main criterion for the machine performance are eddy current losses in the rotor. Influence of time harmonics in stator currents caused by the inverter Pulse Width Modulation (PWM) is incorporated in the calculation.

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“…The first method is a classical analytical method based on geometric and triangular relations, which offers a good result, verified by many authors as in the case of [7,10,11]. The second is a numerical finite element approach, which takes into account the complexity of the geometric shapes of the bars [9]. The last is an analysis method of circuits, which divides the slot in several resistances and leakage reactances in parallel and allows the calculation of the currents travelling through each branch [10].…”

Section: Introductionmentioning

confidence: 98%

Dynamic Modelling of Induction Motor Squirrel Cage for Different Shapes of Rotor Deep Bars With Estimation of the Skin Effect

Aouzellag¹

2017

PIER M

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Abstract-This paper presents a dynamic modelling of a series of induction motors (IM) squirrel cage with different shapes of rotor deep bars taking into account the skin effect. The approach is divided into two parts. The first part consists in modelling the skin effect in a rectangular rotor deep-bar with three methods (conventional analytical method, finite element method and analysis method of circuit). These are compared (estimate of the relative error), and subsequently, generalized to more complex forms (trapezoidal, inverted, direct trapezoidal and double cage), done by using the two last methods which take into account the geometrical non-linearity of the slots. The second part consists in a dynamic modelling with variable parameters that take into account the skin effect, simulated for a series of motors with the same power (with different geometric shapes of rotor bars), to see their influence on the starting characteristics of these IM, and the results are compared and discussed.

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Design of Rotating Electrical Machines

Cited by 896 publications

References 0 publications

Synchronous reluctance motor technology: industrial opportunities, challenges and future direction

Synchronous reluctance motor technology: industrial opportunities, challenges and future direction

Comparative analysis of rotor losses in high-speed permanent magnet machines with different winding configurations considering the influence of the inverter PWM

Dynamic Modelling of Induction Motor Squirrel Cage for Different Shapes of Rotor Deep Bars With Estimation of the Skin Effect

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