Publications related to Optimization design of a segmented Halbach permanent magnet motor using an analytical model

Coordinate parameterisation and spectral method optimisation for Beltrami field solver in stellarator geometry

David Pfefferlé, Antoine Baillod, Ajay Kumar

The numerical solution of the stepped pressure equilibrium (Hudson et al 2012 Phys. Plasmas 19 112502) requires a fast and robust solver to obtain the Beltrami field in three-dimensional geometry such as stellarators. The spectral method implemented in the ...

IOP PUBLISHING LTD2020

Free-boundary MRxMHD equilibrium calculations using the stepped-pressure equilibrium code

Joaquim Loizu Cisquella

The stepped-pressure equilibrium code (SPEC) (Hudson et al 2012 Phys. Plasmas 19, 112 502) is extended to enable free-boundary multi-region relaxed magnetohydrodynamic (MRxMHD) equilibrium calculations. The vacuum field surrounding the plasma inside an arb ...

2020

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Joaquim Loizu Cisquella, Sophie Danielle Angelica Gorno, Claudia Colandrea, Marco Wischmeier, Cedric Kar-Wai Tsui, Mirko Wensing, Hugo De Oliveira

Recent TCV experiments confirm the predicted formation of an electric potential well, below the magnetic X-point, in configurations with unfavorable

B_t

field direction (ion

\nabla B

drift away from the divertor), that substantially reshapes the typica ...

2020

Electrical effects in winding of large electrical ac machines application to advanced large size DFIM

Frédéric Michael Maurer

To meet the electrical grid's demand on pump power variation, GE Renewable Energy develops since 10 years variable speed machines (also called Doubly Fed Induction Generators or DFIG). Within turbogenerators, the phenomenon of circulating currents in Roebe ...

EPFL2019

Topology Optimization for Coils of Electric Machine with Level-set Method

Yves Perriard, Adrien Jean-Michel Thabuis, Xiaotao Ren

This work studies the level-set based topology optimization for the optimal layout of winding in electric motor. The functional to optimize is to maximize the torque in the air-gap. The coil domain is initiated by a level set function. The time evolutionar ...

IEEE2019

Implementation of drift velocities and currents in SOLEDGE2D-EIRENE

Davide Galassi, Nicolas Mellet, Eric Serre

In order to improve cross-field transport description, drifts and currents have been implemented in SOLEDGE2D-EIRENE. The derivation of an equation for the electric potential is recalled. The resolution of current equation is tested in a simple slab case. ...

2017

Design of an external BLDC motor with integrated electronics for 48V on-board power supply

For truck and electric two-wheel applications, the design target is an electric motor with working point in the range of 18-20Nm @ 4000rpm functioning at ambient temperatures from -40°C to 105°C. The design will be based on an existing Sonceboz BLDC motor. ...

2016

Electron trapping mechanisms in magnetron injection guns

Jean-Philippe Hogge, Ioannis Pagonakis, Jiahuan Zhang, Konstantinos Avramidis

A key parameter for the gyrotron operation and efficiency is the presence of trapped electrons. Two electron trapping mechanisms can take place in gyrotrons: (i) the adiabatic trap and (ii) the magnetic potential well. Their influence on the gyrotron opera ...

AIP2016

Isogeometric Finite Elements With Surface Impedance Boundary Conditions

Annalisa Buffa, Rafael Vazquez Hernandez

First- and second-order surface impedance boundary conditions are introduced in the harmonic 2-D variational formulation based on the magnetic vector potential. The problem is discretized with isogeometric finite elements, a recent method that uses NURBS f ...

2014

Rotor Design Optimization for a Reaction Sphere Actuator

Yves Perriard, Leopoldo Rossini

This paper presents the rotor design optimization for a reaction sphere (RS) actuator. The RS is a permanent-magnet synchronous spherical actuator whose rotor is magnetically levitated and can be accelerated about any desired axis. The RS is composed of an ...

Institute of Electrical and Electronics Engineers2014

Optimization design of a segmented Halbach permanent magnet motor using an analytical model

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Coordinate parameterisation and spectral method optimisation for Beltrami field solver in stellarator geometry

Free-boundary MRxMHD equilibrium calculations using the stepped-pressure equilibrium code

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

Electrical effects in winding of large electrical ac machines application to advanced large size DFIM

Topology Optimization for Coils of Electric Machine with Level-set Method

Implementation of drift velocities and currents in SOLEDGE2D-EIRENE

Design of an external BLDC motor with integrated electronics for 48V on-board power supply

Electron trapping mechanisms in magnetron injection guns

Isogeometric Finite Elements With Surface Impedance Boundary Conditions

Rotor Design Optimization for a Reaction Sphere Actuator

Coordinate parameterisation and spectral method optimisation for Beltrami field solver in stellarator geometry

Electrical effects in winding of large electrical ac machines application to advanced large size DFIM

Topology Optimization for Coils of Electric Machine with Level-set Method

Design of an external BLDC motor with integrated electronics for 48V on-board power supply

Free-boundary MRxMHD equilibrium calculations using the stepped-pressure equilibrium code

Rotor Design Optimization for a Reaction Sphere Actuator

Isogeometric Finite Elements With Surface Impedance Boundary Conditions

Implementation of drift velocities and currents in SOLEDGE2D-EIRENE

Electron trapping mechanisms in magnetron injection guns

Experimental verification of X-point potential well formation in unfavorable magnetic field direction