Analysis of Circulating Current Loss for High-Speed Permanent Magnet Motor

Fang, Jiancheng; Liu, Xiquan; Han, Bangcheng; Wang, Kun

doi:10.1109/tmag.2014.2302412

Cited by 39 publications

(25 citation statements)

References 27 publications

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“…The analytical circulating current model proposed in [24] is briefly re-presented here, and generalized to cover arbitrary circuit topologies. The leakage flux of a single slot of a machine is considered first.…”

Section: Circuit Modelmentioning

confidence: 99%

“…In [24], the back-EMF vector E was assumed to be only due to permanent magnet flux, and equal for all the strands in the same slot. Thus, E could be written as…”

Section: B Taking the Rotor Into Accountmentioning

confidence: 99%

“…Nevertheless, a few more relevant papers were published recently. In 2014 and 2015, two circuit-based models were used to analyse permanent magnet (PM) machines [24], [25]. Furthermore, in 2015 a computationally light method for FE analysis of arbitrary windings was proposed [26], [27].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, this paper proposes two methods to analyse the statistical properties of circulating currents. Firstly, the circuit model in [24] is extended to take also the rotor of the machine into account. Secondly, the FE approach of [27] is improved.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Monte Carlo Analysis of Circulating Currents in Random-Wound Electrical Machines

Lehikoinen

Chiodetto

Lantto³

et al. 2016

IEEE Trans. Magn.

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Electrical machines with stranded random windings often suffer from considerable circulating current losses. These losses have been poorly studied because of the difficulty and computational cost of modelling stranded windings, and the stochastic nature of the problem due to the uncertain positions of the strands. This paper proposes two methods to model random stranded windings of arbitrary complexity. Firstly, a circuit model considering the entire main flux path is presented, and some practical implementation considerations are discussed. Secondly, a computationally efficient finite element approach based on non-conforming meshing is presented. Finally, a method is proposed to model the random packing process of strands within a slot, without any re-meshing or inductance re-calculation required. The proposed methods are then compared to special no-rotor measurement data of a large number of high-speed induction machines, and a good agreement is observed.

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Section: Circuit Modelmentioning

confidence: 99%

“…In [24], the back-EMF vector E was assumed to be only due to permanent magnet flux, and equal for all the strands in the same slot. Thus, E could be written as…”

Section: B Taking the Rotor Into Accountmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Monte Carlo Analysis of Circulating Currents in Random-Wound Electrical Machines

Lehikoinen

Chiodetto

Lantto³

et al. 2016

IEEE Trans. Magn.

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“…studies have mostly focused on purely series-connected coils, or idealized Litz wires. By contrast, the scarce research on circulating currents has mostly ignored the proximity effects [9]- [12]. Some brute-force and analytical approaches have also been studied, typically with problems with relatively few conductors [13]- [21].…”

Section: Introductionmentioning

confidence: 99%

Reduced basis finite element modelling of electrical machines with multi-conductor windings

Lehikoinen

Arkkio

Belahcen

2016

2016 XXII International Conference on Electrical Machines (ICEM)

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Abstract-Finite element analysis of electrical machines with multi-conductor windings can be computationally costly. This paper proposes a solution to this problem, using a reduced basis approach. The field-circuit problem is first solved in a single slot only, with a set of different boundary conditions. These pre-computed solutions are then used as shape functions to approximate the solution in all slots of the full problem. A polynomial interpolation method is also proposed for coupling the slot domains with the rest of the geometry, even if the geometries or meshes do not fully conform on the boundary.The method is evaluated on several test problems. According to the simulations, accurate solutions are obtained. Furthermore, a speed-up factor of 30 is observed when analysing a six-slot phase belt of a high-speed induction machine.Index Terms-Finite element analysis, eddy currents, proximity effects, reduced order systems.

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Investigation of the rotor temperature of a turbo-molecular pump with different motor drive methods

Liu

Mao

2017

Vacuum

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Analysis of Circulating Current Loss for High-Speed Permanent Magnet Motor

Cited by 39 publications

References 27 publications

Monte Carlo Analysis of Circulating Currents in Random-Wound Electrical Machines

Monte Carlo Analysis of Circulating Currents in Random-Wound Electrical Machines

Reduced basis finite element modelling of electrical machines with multi-conductor windings

Investigation of the rotor temperature of a turbo-molecular pump with different motor drive methods

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