Permanent Magnet Synchronous Motor with Different Rotor Structures for Traction Motor in High Speed Trains

Torrent, M. C.; Perat, J.I.; Jiménez, José A.

doi:10.3390/en11061549

Cited by 42 publications

(30 citation statements)

References 26 publications

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“…The rotor topologies used are the surface mounted PM rotor, capped PM rotor, and spoke PM. While there are many other topologies to choose from and variations on each of them, see e.g., [13][14][15][16]18,19,23,24], the three chosen topologies are all relatively simple. All three topologies allow the PM to be represented as a rectangular block with a well defined height and width, along and across magnetisation, respectively.…”

Section: Geometries and Rotor Topologiesmentioning

confidence: 99%

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The Influence of Permanent Magnet Material Properties on Generator Rotor Design

Eklund

Eriksson

2019

Energies

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Due to the price and supply insecurities for rare earth metal-based permanent magnet (PM) materials, a search for new PM materials is ongoing. The properties of a new PM material are not known yet, but a span of likely parameters can be studied. This paper presents an investigation on how the remanence and recoil permeability of a PM material affect its usefulness in a low speed, multi-pole, and PM synchronous generator. Demagnetisation is also considered. The investigation is carried out by constrained optimisation of three different rotor topologies for maximum torque production for different PM material parameters and a fixed PM maximum energy. The rotor topologies used are surface mounted PM rotor, spoke type PM rotor and an interior PM rotor with radially magnetised PMs. The three different rotor topologies have their best performance for different kinds of materials. The spoke type PM rotor is the best at utilising low remanence materials as long as they are sufficiently resistant to demagnetisation. The surface mounted PM rotor works best with very demagnetisation resistant PM materials with a high remanence, while the radial interior PM rotor is preferable for high remanence materials with low demagnetisation resistance.interact with the demagnetisation magnetic flux density curve. Different rotor topologies have been studied previously. In [13], three topologies, similar to those studied here, are compared for use in 4-pole traction motors for trains. Similar topologies are compared for use as an aircraft starter-generator in [14]. Five different topologies, not including the spoke-type rotor, are compared in [15]. Ref. [16] also compares five different topologies, including the spoke-type rotor. Ref.[17] compares machines with Nd-Fe-B, Sm-Co and alnico for surface mounted 4-pole machines. Ref.[18] compares three machine configurations for interior v-shaped magnets for two different materials: the novel material NdFe 12 N x and a conventional Nd-Fe-B magnet. A spoke-type rotor with ferrites is compared to a rotor with surface mounted Nd-Fe-B magnets for a wind power generator in [19,20]. A comparison of demagnetization risk for the same generator types is presented in [21].The aim of this paper is to study how the magnetic properties of PM materials affect the machine design in low-speed radial flux PM generators. To our knowledge, there has not been any previous study combining material properties with rotor design and rotor topology choice. The results from this study could give hints on which property to improve when developing new PM materials as well as on the suitability of a material with certain magnetic properties for different generator topologies.

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Section: Geometries and Rotor Topologiesmentioning

confidence: 99%

“…Different rotor topologies have been studied previously. In [13], three topologies, similar to those studied here, are compared for use in 4-pole traction motors for trains. Similar topologies are compared for use as an aircraft starter-generator in [14].…”

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confidence: 99%

The Influence of Permanent Magnet Material Properties on Generator Rotor Design

Eklund

Eriksson

2019

Energies

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“…To proceed with our analysis we first consider the inner-loop control inputs in Equation (5) of the incremental EV model by putting together Equations (7), (10) and (13) e m,ds = −k P,ds (I ds − I * ds ) − k I,ds e c e m,qs = −k P,qs (I qs − I * qs )…”

Section: Stability Analysis With the Fast Current Controllers Dynamicmentioning

confidence: 99%

“…PMSMs can be classified according to their rotor geometry and/or to their magnet arrangements. Among the different kinds used in EV applications, primarily the interior PMSM and secondly the surface-mounted PMSM are dominant [11][12][13][14]. The first one behaves like a salient pole motor while the second one acts like a cylindrical rotor PMSM.…”

Section: Introductionmentioning

confidence: 99%

Power Electronic Control Design for Stable EV Motor and Battery Operation during a Route

Makrygiorgou

Alexandridis

2019

Energies

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Electric vehicles (EVs), during a route, should normally operate at the desired speed by effectively controlling the power that flows between their batteries and the electric motor/generator. To implement this task, in this paper, the voltage source AC/DC converter is considered as a controlled power interface between the electric machine and the output of the DC storage device; the DC/DC converter is used to automatically regulate the battery operating condition in accordance to the profile of the acting on the vehicle wheels, unknown external torque. Particularly, the speed is continuously regulated by the vehicle driver via the pedal while all other regulations for absorbing or regenerating energy are internally controlled. The driver command is acting as speed reference input on a PI outer-loop motor speed controller which, in its turn, drives a fast P inner-loop current controller operating in cascaded mode. In a similar manner, the machine and the battery performance are self-regulated by a pure PI current controller that achieves maximum electric torque per ampere operation of the motor and by a PI/P cascaded scheme for the DC-voltage/battery–current regulation, respectively. In order to exclude any possibility of instabilities and adverse impacts between the different parts, a rigorous analysis is deployed on the complete electromechanical system that involves the motor, the batteries, the converter dynamic models and the proposed controllers. Modeling the system in Euler–Lagrange nonlinear form and applying sequentially suitable Lyapunov techniques and the time-scale separation principle, a systematic method for tuning the gains of the inner- and outer-loop controllers is derived. Therefore, the proposed controller design procedure guarantees asymptotic stability by considering the accurate system model as a whole. Finally, the proposed approach is validated by simulating realistic route conditions, performed under unknown external torque variations.

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“…Permanent-magnet synchronous machines excel in high torque density and high efficiency, so they have been widely investigated in recent years [1][2][3]. From the two permanent-magnet synchronous-machine topologies, i.e., surface permanent-magnet machines (SPM) and interior permanent-magnet machines (IPM), the latter are especially suitable for transport applications, where a wide speed range is a key requirement [4,5]. The specific feature that enables such an operation is their pronounced flux-weakening capability.…”

Section: Introductionmentioning

confidence: 99%

Fast and Accurate Model of Interior Permanent-Magnet Machine for Dynamic Characterization

2019

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A high-fidelity two-axis model of an interior permanent-magnet synchronous machine (IPM) presents a convenient way for the characterization and validation of motor dynamic performance during the design stage. In order to consider a nonlinear IPM nature, the model is parameterized with a standard dataset calculated beforehand by finite-element analysis. From two possible model implementations, the current model (CM) seems to be preferable to the flux-linkage model (FLM). A particular reason for this state of affairs is the rather complex and time-demanding parameterization of FLM in comparison with CM. For this reason, a procedure for the fast and reliable parameterization of FLM is presented. The proposed procedure is significantly faster than comparable methods, hence providing considerable improvement in terms of computational time. Additionally, the execution time of FLM was demonstrated to be up to 20% shorter in comparison to CM. Therefore, the FLM should be used in computationally intensive simulation scenarios that have a significant number of iterations, or excessive real-time time span.

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Permanent Magnet Synchronous Motor with Different Rotor Structures for Traction Motor in High Speed Trains

Cited by 42 publications

References 26 publications

The Influence of Permanent Magnet Material Properties on Generator Rotor Design

The Influence of Permanent Magnet Material Properties on Generator Rotor Design

Power Electronic Control Design for Stable EV Motor and Battery Operation during a Route

Fast and Accurate Model of Interior Permanent-Magnet Machine for Dynamic Characterization

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