Three-dimensional theory of eddy-current couplings with copper-faced loss drums

Davies, E.J.; Wright, Michael T.; McKibbin, H.

doi:10.1049/piee.1977.0249

Cited by 7 publications

(7 citation statements)

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“…The analytical approach used to calculate the resistive torque is based on [6], [7] and [8], with modifications to correctly describe the prototype geometry. The magnetic coupling rotor parameters are shown in Fig.…”

Section: Methodology For Wall Influence Determinationmentioning

confidence: 99%

“…By using the equivalent model shown in Fig. 12, it is possible simplify the problem and use the analytical approach in [6], [7] and [8] as a basis. The coordinate system is also shown in Fig.…”

Section: Methodology For Wall Influence Determinationmentioning

confidence: 99%

“…Apart from these equations, it is also possible to write the system coordinates with origin in O as a function of the coordinates in the other system, as shown in (6) to (8).…”

Section: Common Topologiesmentioning

confidence: 99%

“…' 01 z z z   (8) In this way, it is possible to replace (6) to (8) in (3) and then use a numerical integration to solve it, because there is no analytical solution developed so far to evaluate that equation.…”

Section: Common Topologiesmentioning

confidence: 99%

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Study of losses in permanent magnet couplings due to highly conductive walls

Matsumoto

Chabu

2014

2014 International Conference on Electrical Machines (ICEM)

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 Abstract --The main objectives of this work are to study and to determine losses effect in permanent magnet couplings in the presence of a non-magnetic conductive wall between its rotors. These losses are originated from eddy currents that circulate in the wall and entail a resistive torque to the one that is transmitted by the coupling and therefore, reduces the efficiency of its transmission. The determination of the nonmagnetic conductive wall influence on the magnetic coupling behavior is of major importance, since it allows the correct designing in applications such as sealed pumps and magnetic stirrers. An analytical approach was employed to calculate the permanent magnet behavior with and without the wall.

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Section: Methodology For Wall Influence Determinationmentioning

confidence: 99%

Section: Methodology For Wall Influence Determinationmentioning

confidence: 99%

“…Apart from these equations, it is also possible to write the system coordinates with origin in O as a function of the coordinates in the other system, as shown in (6) to (8).…”

Section: Common Topologiesmentioning

confidence: 99%

Section: Common Topologiesmentioning

confidence: 99%

See 2 more Smart Citations

Study of losses in permanent magnet couplings due to highly conductive walls

Matsumoto

Chabu

2014

2014 International Conference on Electrical Machines (ICEM)

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“…Finally, we have the same boundary value problem to solve as the one given by (13) and (14), apart from the second member in (29), but this is not a problem because the solution is time-harmonic as indicated by (3). Using the method of separation of variables, general solution of (29) which satisfies the boundary conditions (30) is given by…”

Section: B Magnetic Field In the Nonconducting Regionsmentioning

confidence: 99%

Improved 3-D Analytical Model for Axial-Flux Eddy-Current Couplings With Curvature Effects

Lubin

Rezzoug

2017

IEEE Trans. Magn.

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An improved three-dimensional analytical model for axial-flux permanent-magnet eddy-current couplings is presented in this paper. As the problem is solved in a 3-D cylindrical coordinate system, the proposed model directly takes into account the radial edge effects and the curvature effects on the torque prediction without the need of any correction factor. It is shown that the new analytical model is very accurate, even for the geometries where the curvature effects are very pronounced. Another advantage of the proposed model is the great reduction of computation time compared to 3-D finite elements simulations and an easier adaptation for parametric studies and optimization.

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Motional eddy currents in a nonmagnetic conducting laminate backed with an iron substrate

Zmood

1985

Journal of Applied Physics

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This paper discusses the eddy currents induced in a nonmagnetic conducting laminate on an iron substrate. These results are applicable to the analysis of linear induction motors, ordinary induction machines with sleeve rotors, and eddy current couplings. Under appropriate assumptions it is shown that the boundary conditions and Ampere's circuital law reduce the problem to eight linear simultaneous equations. Simple algebraic expressions for the current density and power dissipation in the laminate are obtained in terms of the solutions of the above simultaneous equations. Numerical results for typical situations are presented, and a brief discussion of the experimental verification of the analysis is presented.

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Three-dimensional theory of eddy-current couplings with copper-faced loss drums

Cited by 7 publications

References 0 publications

Study of losses in permanent magnet couplings due to highly conductive walls

Study of losses in permanent magnet couplings due to highly conductive walls

Improved 3-D Analytical Model for Axial-Flux Eddy-Current Couplings With Curvature Effects

Motional eddy currents in a nonmagnetic conducting laminate backed with an iron substrate

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