Performance assessment tool based on loadability concepts

Sizing equations of radial and axial electrical machines are developed. From these equations, the main geometrical parameters of the machines are obtained from the specifications and the loads. Analytical models of the open circuit and armature reaction fields are set up and associated to the sizing equations. This results in more accurate sizing equations. An axial and a radial flux motors are sized for the same loads and the same specifications to check the effectiveness of the sizing approach. Eventually Finite Element Analysis results validate the analytical models. Index Terms--axial flux machines, radial flux machines, sizing model, sinusoidal machines.

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“…This expression gives a torque that does not depend on time. For the RFPM motors the integral leads to [15]:…”

Section: B Torque Modelmentioning

confidence: 99%

“…The tool developed in [15] allows computing the main sizes of the RFPM motor knowing its specifications and its loads which are the input data given in Table II. The loads are chosen depending on the levels of the magnetic, electric and thermal manufacturing technologies at disposal.…”

Section: Unified Sizing Equationsmentioning

confidence: 99%

Unified Sizing Model Approach for Radial and Axial Flux Permanent Magnet Machines

Théo

Bonnet

Touhami

et al. 2020

2020 International Conference on Electrical Machines (ICEM)

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“…14 show the electromechanical characteristics calculated by the proposed approach fit well the ones calculated by FEA. This approach allows to design quickly and with a good precision the performances of an electric motor considering fundamental waves (1) and (2).…”

Section: Conductor Distribution Functionsmentioning

confidence: 99%

“…To rationalize the search of high specific power electric motor, it is helpful to use the loadability concepts defined by some designers [1]. They can characterize intrinsically the performances and the technological levels of electric motors [2]. These concepts and the works presented in [3] can be used to develop analytical models for sizing electrical motors.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Joint Design of Halbach Segmented Array and Distributed Stator Winding

Touhami

Lefèvre

Llibre

2018

2018 XIII International Conference on Electrical Machines (ICEM)

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In the past, designers develop analytical models that are useful to size rapidly surface mounted permanent magnet synchronous motor with sinusoidal waves and a high specific power. In order to ensure the assumptions of sinusoidal waves, a joint design of the stator winding and the rotor is presented. First, an Halbach permanent magnet array is optimized to obtain the desired airgap magnetic flux density wave. Then, in order to obtain a surface current density wave consistent with the desired wave, the conductor distribution along the stator bore is determined.

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Determination of electric motor losses and critical temperatures through an inverse approach

2020

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In this study, a practical numerical method is proposed to estimate losses of high specific power density electric motors, using few simulated temperature data. In such electric motors, these losses generate high heat fluxes inside the motor components that can be critically sensitive to temperature. Electromagnetic and mechanical friction phenomena are behind the occurring of these thermal dissipations. For both phenomena, losses could be difficult to compute with electrical or mechanical approaches. However, thermal management of electric motors requires a precise knowledge of those losses, in particular for high-performance motors such as those considered in future hybrid planes. To determine electric motor losses in a Permanent Magnet Synchronous Motor (PMSM) in real time, an inverse method using a Lumped Parameter Thermal Model (LPTM) is elaborated. In the first step, the dynamic profile of losses is determined through the inverse method, based on temperature data at easy-access points of the motor. In a second step, the identified losses are used to find temperatures at critical non-accessible hot spot points of the motor through forward LPTM. The method is applied for three useful cases, from the simplest case scenario, where only one type of losses has to be identified, to the most complicated case where all losses are simultaneously estimated. A global strategy for the choice of the number of future time steps used for regularization of the ill-posed problem is also proposed. Results show that this method enables adequate real-time supervision of the critical motor temperatures, mainly rotor and winding core.

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Performance assessment tool based on loadability concepts

Cited by 6 publications

References 3 publications

Unified Sizing Model Approach for Radial and Axial Flux Permanent Magnet Machines

Unified Sizing Model Approach for Radial and Axial Flux Permanent Magnet Machines

Joint Design of Halbach Segmented Array and Distributed Stator Winding

Determination of electric motor losses and critical temperatures through an inverse approach

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