Nonlinear Analytical Computation of the Magnetic Field in Reluctance Synchronous Machines

Mahmoud, Hanafy; Bacco, Giacomo; Chiodetto, Nicola

doi:10.1109/tia.2017.2746560

Cited by 23 publications

(8 citation statements)

References 29 publications

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“…In the relation, α is chosen 0.1 based on trial and error which leads to a robust algorithm that converges to any saturation levels in all conditions [22][23][24]. For the contribution of the slotting effect on the air-gap flux density waveform obtained by MEC, it is modified by a permeance function, which is calculated by conformal mapping.…”

Section: Pmsm Descriptionmentioning

confidence: 99%

“…As a result, a modified air‐gap flux density is obtained. The permeance function can be expressed as follows:

λ_{r} ()(, r, θ_{s}) = Λ_{0} ()(, r) + \sum_{n = 1}^{\infty} Λ_{n} ()(, r) \cos ()(, n Q_{s} θ_{s})

where

Q_{s}

is the number of slots,

Λ_{0}

and

Λ_{n}

are specific coefficients [22].…”

Section: Pmsm Descriptionmentioning

confidence: 99%

“…For the sake of simplification, the slot effect is neglected at first. Then, the flux density waveform obtained by MEC method is modified by a permeance function [22].…”

Section: Pmsm Descriptionmentioning

confidence: 99%

“…In the next iteration, the new

μ_{r}

is calculated based on the flux density of each reluctance calculated in the previous iteration. It is cited that if the previous permeability is replaced with the new one, the algorithm would diverge; hence, the permeability for next iteration should be calculated based on the following equation:

μ_{r}^{n + 1} = ()(, 1 - α) μ_{r +}^{n} α μ_{r}^{n + 1}

In the relation,

α

is chosen 0.1 based on trial and error which leads to a robust algorithm that converges to any saturation levels in all conditions [22–24].…”

Section: Pmsm Descriptionmentioning

confidence: 99%

See 3 more Smart Citations

Techno‐economic design optimisation of an interior permanent‐magnet synchronous motor by the multi‐objective approach

Ilka

Alinejad‐Beromi

Yaghobi

2018

IET Electric Power Applications

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In engineering terms, it is always desirable to maximise the efficiency of the motor and to look the problem in economic viewpoint, minimisation of the weight and cost of the motor is required. As these two aspects are like two sides of a coin, it is usually aimed to acquire the best efficiency per weight and cost. As a result, the performance improvement of permanent-magnet synchronous motor (PMSM) has two sides: technical and economic. This study proposes a new approach for design optimisation of an interior PMSM (IPMSM) taking into account both technical performances and economic considerations. The selected rotor configuration is a good candidate for general purpose industrial applications. A multiobjective optimisation technique based on a new and efficient magnetic equivalent circuit of the motor is applied to obtain optimal motor parameters. A Pareto front composed of possible optimal solutions is provided. The best optimal solution is then selected using a k-means clustering algorithm. To verify the efficacy of the design optimisation, the performance characteristics of the optimal PMSM are compared by both the finite element simulations and the experiments. In the test setup, an 8-pole, 200-Watt, four-phase IPMSM with an optimised structure is prototyped where the results give agreeable accuracy.

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Section: Pmsm Descriptionmentioning

confidence: 99%

“…As a result, a modified air‐gap flux density is obtained. The permeance function can be expressed as follows:

λ_{r} ()(, r, θ_{s}) = Λ_{0} ()(, r) + \sum_{n = 1}^{\infty} Λ_{n} ()(, r) \cos ()(, n Q_{s} θ_{s})

where

Q_{s}

is the number of slots,

Λ_{0}

and

Λ_{n}

are specific coefficients [22].…”

Section: Pmsm Descriptionmentioning

confidence: 99%

“…For the sake of simplification, the slot effect is neglected at first. Then, the flux density waveform obtained by MEC method is modified by a permeance function [22].…”

Section: Pmsm Descriptionmentioning

confidence: 99%

“…In the next iteration, the new

μ_{r}

μ_{r}^{n + 1} = ()(, 1 - α) μ_{r +}^{n} α μ_{r}^{n + 1}

In the relation,

α

is chosen 0.1 based on trial and error which leads to a robust algorithm that converges to any saturation levels in all conditions [22–24].…”

Section: Pmsm Descriptionmentioning

confidence: 99%

See 2 more Smart Citations

Techno‐economic design optimisation of an interior permanent‐magnet synchronous motor by the multi‐objective approach

Ilka

Alinejad‐Beromi

Yaghobi

2018

IET Electric Power Applications

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show abstract

“…On the other hand, electrical machine topologies without magnets have been collecting the interest of the industry due to the high cost of the permanent magnet materials and because of the uncertainties of their future availability. As a result, synchronous reluctance machine (SynRel) has seen an increased interest and a rapid development because of the absence of permanent magnet materials in their structure [12][13][14]. The aim of increasing the torque density of the synchronous reluctance machine to compete with the magnet topologies has been the main priority for developers of synchronous reluctance machine [15].…”

Section: Introductionmentioning

confidence: 99%

Double Rotor Synchronous Reluctance Machine: Analysis towards Torque Capability

Al-Ani

Mahmoud

Gerada

2018

2018 XIII International Conference on Electrical Machines (ICEM)

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This paper presents a comparative analysis of double rotor synchronous reluctance machines. Different topologies of the proposed machine have been investigated, such as double rotor with double-sided stator and double rotor with single-sided stator machines. A comparison between these topologies has been conducted to understand the potential of improving the machine capabilities in terms of high average torque/power density, with respect to the conventional synchronous reluctance machine. The benefits of a double rotor topology are described in detail considering different number of stator slots. Furthermore, given the higher structural complexity with respect to a single airgap machine, a mechanical analysis of the inner and outer rotors has been conducted to assess the robustness of the inner and outer rotors iron ribs.

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