... 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...

... are ∂A _z/∂y and ∂A _z/∂x, i.e. the magnetic vector potential A should be approximated quite accurately in the in-plane direction. © Emerald Group Publishing Limited 2013 Higher order FEM Anisotropy Iron core Domain decomposition method Non...

... 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...

... management Vectors Control systems The speed drive system controls depend greatly on the sensor output qualities (voltage, current, position, speed, etc.). The main goal of these devices is to provide measurement feedback to control process behavior. Consequently, the online output sensor data has...

... is generated. © Emerald Group Publishing Limited 2009 Object‐oriented methods Modelling Vectors Force measurement Actually, the task of the designer is complicated by the evidence that different energy domains, in general being mutually coupled, are involved when modelling micro‐electro...

...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...

... 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...

... 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...

...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...

... 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...

...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...

... 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...

... has to be calculated. At edges singularities occur. Following a method to calculate the field strength on charged surfaces a way out is presented. As the singularity vector method is easy to manage, we regard it to be a reasonable procedure whenever one has to deal with edge singularities...

.... 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...