... systems. Using the rotating space vector technique, common mode voltage is eliminated but this reduces the VTR of the converter. To improve the VTR, a modified MC topology with a modified rotating space vector strategy is proposed. In addition, for improving the power factor at the input, the input...

...-Atherton vector hysteresis model. Design/methodology/approach – In laminated magnetic cores when the magnetic flux rotates in the lamination plane, one observes an increase in the magnetic losses. The magnetization in these regions is very complex needing a vector model to analyze and predict its...

... transient nonlinear problems or hysteresis modeling as well. Andreas Hauck can be contacted at: andreas.hauck@simetris.de © Emerald Group Publishing Limited 2013 Higher order FEM Anisotropy Iron core Domain decomposition method Non-linear analysis Magnetic vector potential Iron...

... of complex numbers is used to represent all the plane vectors (vector distances) and another set of complex numbers is used to represent all the sinusoidal time varying quantities (electric charges and voltages). The simultaneous representation of vector distances and sinusoidal time varying quantities...

.... Design/methodology/approach Firstly, the characteristic B‐M resulting from the constitutive relation B‐H is replaced by a relation between the components of the harmonics of the vectors B and M . Secondly, a dynamic overrelaxation method...

... in magnetizing processes. The purpose of this paper is to discuss the pertinent parameters that determine these losses and a method of identifying them. Design/methodology/approach A vector model was used that is designed to compute losses correctly, to focus on hysteresis losses in models that compute...

... a load torque (T_l=0). The control strategy is determined from the DFIM model expressed in the dq rotating reference frame. As shown in Figure 2 , the stator flux vector is oriented on the direct axis (Φ_s=Φ_sq and Φ_sq...

..., and to verify new designs (Schwarz et al., 2004). Modelling, simulation and analysis tools are needed to support the MEMS designer during these activities. In the design of microsystems, sophisticated CAD systems, based on FEM, like OPERA from Vector Fields, COSMOS and ANSYS, are exploited...

...Stanislaw Gratkowski; Andrzej Brykalski; Ryszard Sikora; Takashi Todaka; Kenji Nakanoue; Masato Enokizono Purpose The purpose of this paper is to reduce computation time of magnetic characteristic analysis considering 2D vector magnetic properties. Design/methodology/approach The paper...

... The approach is based on the synthesis of a suitable vector selection table in order to reduce torque ripple. The performance analysis is carried out based on three criteria: the total harmonic distortion; the switching loss factor; and the quality factor. Findings It has been clearly shown...

... with those yielded by six‐switch three‐phase inverter (SSTPI) fed induction motor drives under the Takahashi DTC strategy. Design/methodology/approach Referring to the asymmetrical stator voltage vectors and in order to reach high dynamic with low ripple of the electromagnetic torque response, the design...

...Raffaele Martone; Alessandro Formisano; Edward Della Torre; Ermanno Cardelli Purpose This paper aims to discuss the problems associated with using a new vector hysteresis model. Design/methodology/approach The implementation of this new model is independent of the coordinate system used, thus...

...Andrzej Demenko; Kay Hameyer; Lech Nowak; Krzysztof Zawirski; François Henrotte; André Nicolet; Kay Hameyer Purpose Proposes a new quasi‐static vector hysteresis model based on an energy approach, where dissipation is represented by a friction‐like force. Design/methodology/approach The start...

... function. Seeks to investigate the possibilities of operating drive system under distorted line voltage with unity power factor and reduced dc‐link capacitor. Design/methodology/approach A novel control strategy is proposed based on direct power and direct torque control with space vectors modulators...

... protection of power transformers. Design/methodology/approach The differential signal obtained from the protective relays of power transformers is analyzed in this paper, in order to establish a relation between time‐dependent symmetrical components and space vectors. As a result of the formulation...

.... Deals with the mathematical simulation of the therapeutical technique, i.e. the magnetic stimulation method. Considers the low‐frequency magnetic field. To consider eddy currents one uses the pair of potentials: electric vector potential T→ and magnetic scalar potential Ω . Since the problem...

... has to be calculated. At edges singularities occur. Following a method to calculate the field strength on charged surfaces a way out is presented. To demonstrate the influence of the singularity vectors on a nonlinear calculation, results with different regularisation constants, L...