Analysis of slot-pole combination of fractional-slots PMSM for embedded applications

Dogan, Hussein; Würtz, Fréderic; Foggia, Albert; Garbuio, Lauric

doi:10.1109/acemp.2011.6490669

Cited by 20 publications

(7 citation statements)

References 9 publications

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“…The material used in our case (silicone iron) allows 1.4T as a maximum induction. The choice of the number of slot depends on the following criteria [21] • Winding factor…”

Section: Magnetic Circuit (Core)mentioning

confidence: 99%

Non-Intrusive Partial Discharges Investigations on Aeronautic Motors

Billard

Abadie

Taghia

2016

SAE Technical Paper Series

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 18225 Any correspondence concerning this service should be sent to the repository administrator: staff-oatao@listes-diff.inp-toulouse.fr AbstractThe present paper reports non-electrically intrusive partial discharge investigations on an aeronautic motor. Relevancy, robustness and repeatability of partial discharge testing procedures, both on insulating materials characterization and on operating aeronautic equipment are essential to ensure reliability of the aircraft systems. The aim of this paper is to be the very first step of defining such procedures and the associated test equipment.To do so, the paper will start by providing an understanding of partial discharge phenomena and will review typical more electrical aircraft architecture. Key characteristics causing partial discharge risk to increase will be highlighted. The impact of harness length, high performance power electronics and voltage level increase on insulation system is demonstrated.Then, an analysis is carried out from motor design perspective to find out which test procedure is relevant to assess each insulation system performance both at atmospheric and reduced pressures. The study helps to realize the benefits of using multiple test sample and procedure to assess insulation system performance level through the design process of the motor. It is shown that a good agreement observed between stator and representative samples. This paper will also review the ability of the non-intrusive test method to detect partial discharge with a full scope of voltage signal from AC to impulse voltage and under different pressures. The paper concludes with an analysis of results and thoughts about future work regarding motor design taking into account partial discharge risk and evolution of proposed procedure.

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“…The material used in our case (silicone iron) allows 1.4T as a maximum induction. The choice of the number of slot depends on the following criteria [21] • Winding factor…”

Section: Magnetic Circuit (Core)mentioning

confidence: 99%

Non-Intrusive Partial Discharges Investigations on Aeronautic Motors

Billard

Abadie

Taghia

2016

SAE Technical Paper Series

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“…For certain coil connection pattern, k dp is usually calculated through the star of slots diagram [22]. k wp = k dp k pp (4) Fortunately, pitch factor k pp is readily derived and can be written as a general function of p and z, as in (7), where h c is coil pitch and equals to 1 for FSCWMs with tooth coil winding. τ and α s denote the electrical pole pitch angle and slot pitch angle, given by (5) and (6).…”

Section: Pole Number Selection a Pole Number Determinationmentioning

confidence: 99%

“…Thus, k pp can be used to exclude some inappropriate pole number candidates. According to (7), 24≤2p ≤48 is a prerequisite for keeping k pp thus k wp larger than 0.85 for 36-slot FSCWM (z = 36).…”

Section: Pole Number Selection a Pole Number Determinationmentioning

confidence: 99%

“…Many researches investigate the influence of pole/slot combinations on performances of FSCWM, including torque density [6], fault-tolerant ability [7], [8], cogging torque [9], rotor eddy current loss [10], unbalanced magnetic pull and torque ripple [11], [12]. These researches focus mainly on basic pole/slot combinations, e.g., 6/9 (6-pole 9-slot FSCWM with tooth coil winding, hereinafter), 8/9, 8/12, 10/9, 10/12, 14/12 and 14/15.…”

Section: Introductionmentioning

confidence: 99%

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Investigation Study of the Influence of Pole Numbers on Torque Density and Flux-Weakening Ability of Fractional Slot Concentrated Winding Wheel-Hub Machines

et al. 2019

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Fractional slot concentrated winding machines (FSCWMs) with the low operation speed and large diameter usually have a large number of poles and slots; thus, numerous pole/slot combinations are feasible. The common practice to choose pole/slot combinations by multiplying the basic combinations may neglect some competitive candidates. Taking 36-slot FSCWMs as examples, this paper investigates the influence of pole numbers on torque density and flux-weakening ability, the two most vital performances of wheel-hub machine. It is shown that the machines with pole number slightly less than the slot number have the highest torque densities. Each component of synchronous inductance is separately analyzed, and its variation against pole numbers shows obvious regularity. Machines with pole numbers larger than the slot numbers have an excellent flux-weakening ability due to the large inductance and small permanent magnet flux linkage. The measurements together with the finite element analysis results confirm that the stator leakage inductance contributes the most to the superior flux-weakening ability. The identical analysis is also performed on 54-slot and 81-slot FSCWMs, with similar regularities observed.

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“…where P J , P iron and P f , are the Joule, the iron and the mechanical losses, respectively. Note that the eddy current losses in the permanent magnets are neglected in this model since this machine has a theoretical null harmonic distortion that limits eddy current losses [20]. Furthermore, in a complex reference, the vector I me and V* can be expressed as follows…”

Section: Magnetic Circuit Modelmentioning

confidence: 99%

Optimal sizing of an electrical machine using a magnetic circuit model: application to a hybrid electrical vehicle

Reinbold

Vinot²,

Garbuio

et al. 2016

IET Electrical Systems in Transportation

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Numerous researches about hybrid electrical vehicles (HEVs) deal with topologies, technologies, sizing and control. These aspects allow reducing transportation costs and environmental impacts. This study focuses on the sizing of the electrical machine (EM) of the HEV, taking into account its surroundings: the hybrid system, the driving cycle and an optimal energy management. In this study, the parallel HEV is the study case. In a classical HEV design process, a scaling factor is usually applied on an efficiency map model to fix the standard power of the EM. The efficiency and the maximum torque power are scaled using a linear dependency on the rated maximum power. However, this method has some disadvantages. This study proposes two formulations of a scaling model based on a magnetic circuit model (MCM) with one or ten parameters. Then, the MCM is involved in a multi-objective optimisation process of the HEV. This process is a global sizing process using dynamic programming as an optimal energy management. Optimal sizings of the hybrid vehicle are then proposed for various driving conditions

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Analysis of slot-pole combination of fractional-slots PMSM for embedded applications

Cited by 20 publications

References 9 publications

Non-Intrusive Partial Discharges Investigations on Aeronautic Motors

Non-Intrusive Partial Discharges Investigations on Aeronautic Motors

Investigation Study of the Influence of Pole Numbers on Torque Density and Flux-Weakening Ability of Fractional Slot Concentrated Winding Wheel-Hub Machines

Optimal sizing of an electrical machine using a magnetic circuit model: application to a hybrid electrical vehicle

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