... © Emerald Group Publishing Limited 2016 Magnetic devices Magnetism Magnetic separation Magnetic field and gradient Elliptic cylinder matrices Capture cross-section As shown in Figure 1 , an elliptic cylinder matrix of saturation magnetization Ms, is placed axially...

... wires. Power losses Magnetic devices High-frequency inductors Boundary frequency Eddy currents High-frequency transformers Litz wire Power inductors Proximity effect Skin effect Winding loss η  porosity factor; µ_rs’   real part of complex relative...

.... Rotating machines Magnetic devices Although this magnetic-geared motor has a high transmission torque between the rotors, the torque generated by the coils is low. This is because permanent magnets are mounted at the tip of the teeth of the stator and obstruct the magnetic flux generated...

... Limited 2013 ON/OFF method Adjoint variable method Magnetic head IPM motor Magnetic devices Finite element analysis In the development of an electromagnetic device, the design based on the experience of designers is usually performed. Recently, various optimal design methods using...

... bearings Switched reluctance motor Finite element analysis Magnetic field analysis Magnetic devices Magnetic fields X‐axis=horizontal direction in the cross‐section of BSRM Y‐axis=vertical direction in the cross‐section of BSRM N_a=A‐phase...

.... S. Dufour can be contacted at: stephane.dufour@ensem.inpl‐nancy.fr © Emerald Group Publishing Limited 2012 Eddy currents Magnets Velocity Finite element methods Finite element analysis Magnetic devices The fall of a magnet in a conducting pipe is a classical academic...

... cases: in fact, it depends on the strategy adopted to mesh the synthesis region. Therefore, even if the start was the same, the final geometries are different. © Emerald Group Publishing Limited 2012 Magnetic fields Magnetic devices Optimum design Biotechnology Automated optimal design...

... Equation 2 Equation 3 Equation 4 Equation 5 Optimization techniques Electromechanical devices Magnetic devices Kriging Surrogate modelling Robust design Electromagnetics Electromagnetic design almost always carries a heavy burden of high...

... the remanent field of permanent magnets. Electromagnetism Topology Actuators Magnetic devices Iron Topology optimization Microstructure Permanent magnet Topology optimization methods aim at designing electromagnetic devices in an automated way (Dyck and Lowther, 1996). The designer defines...

... at the optimal positions, in which the effects of the uncertainties in the geometrical model parameters are limited. © Emerald Group Publishing Limited 2012 Electromagnetism Magnetic devices Physical properties of materials Optimum design Optimal experiment design Stochastic Cramér‐Rao bound...

... A satisfactory equivalent model has been identified, and validated in several different conditions. Originality/value The proposed approach can be applied when no detailed information of the source is available, in the case of a cathode without a ferromagnetic yoke. 2D numerical model Magnetic devices...

... weakening region, and on the dq‐axis inductances has been investigated. © Emerald Group Publishing Limited 2012 Cross‐coupling End‐effect Flux weakening Flux‐switching Permanent magnet Switched flux Magnetic devices Automotive industry Permanent magnet (PM) brushless machines...

... Magnetic devices The permanent magnet (PM) machine is adopted in several applications, thanks to its high‐torque density and high efficiency. The PM is a key element of the machine which is also the more expensive component. In addition, particular care has to be given during operating conditions...

... High‐speed operation Magnetic devices Electric motors Numerous sensorless control techniques have been proposed for permanent magnet (PM) brushless dc (BLDC) drives, mostly focusing on low and moderate‐speed operations. However, there are new problems in high‐speed situations. By way...

... Publishing Limited 2011 Finite element analysis Homogenization of windings Multi‐winding transformers Computation Magnetic devices Many power electronic circuits operate at high switching frequencies, from several kHz to several MHz, in order to reduce the volume and the weight...

... as with optimised geometry. Electrical machines Torque Tolerances Magnetic devices Manufacturing systems This study shows the minimisation of cogging torque of a PMSM with respect to manufacturing tolerances and failures. A robust design of the machine is achieved by using numerical simulations...

... A_AHC 3=0.42 mNm is in all three so far presented cases nearly constant and exists owing to the already discussed notches (D=9) on the stator lamination's outer diameter. © Emerald Group Publishing Limited 2011 Torque Electrical machines Magnetic devices Harmonics...

... via simulation and the analytically calculated value of the capacitance between the primary and secondary conductors for a solid tubular outer conductor and a 1:1 turns ratio. This difference is below 5 percent for all the cases except where only four conductors form the outer winding. Magnetic...

...; and p_m mutation probability. Goga Cvetkovski can be contacted at: gogacvet@feit.ukim.edu.mk © Emerald Group Publishing Limited 2010 Magnetic devices Electric motors Vehicle components Optimization techniques When optimising an electric motor, there are multiple choices...

... approximate so care should be made to ensure that the method converges to correct solution. To avoid meaningless results, bounded constraints are imposed the remanent induction parameter. Figure 9 shows the developed algorithm. Finite element analysis Electromagnetic fields Magnetic devices...