A multiple coupled circuit model is presented for simulation of induction machines with both arbitrary winding layout and/or unbalanced operating conditions. The derived by means functions. No symmetry assumed. parameters the are calculated directly from geometry and machine. behavior an machine during starting simulated using this model. results shown to be in good agreement solution obtained a conventional d-q symmetric extended wide variety fault conditions such as broken bars end rings...

A new multiple coupled circuit model is presented for simulation of induction machines with both arbitrary winding layout and/or unbalanced operating conditions. The derived by means functions. No symmetry assumed. parameters the are calculated directly from geometry and machine. behavior an machine during starting simulated using this model. results shown to be in good agreement solution obtained a conventional d-q symmetric then extended wide variety fault conditions such as broken bars...

This paper presents an analytical method of modeling permanent magnet (PM) motors. The model is dependent only on geometrical and materials data which makes it suitable for insertion into design programs, avoiding long finite element analysis (FEA) calculations. procedure based the calculation air gap field density waveform at every time instant. solution Laplacian/quasi-Poissonian equations in polar coordinates takes account slotting. allows rated performance but also such effects as...

In this paper, an optimum-efficiency control scheme of synchronous reluctance motors is presented. There exists a variety combinations d- and q-axis current which provides specific motor torque. The objective the controller to seek combination components, minimum input power, that is, losses at certain operating point in steady state. A small amount perturbation added d-axis reference for purpose searching power point.

In this paper, a new design concept of PM machine for flux weakening operation is proposed. The feasibility strong capability without permanently demagnetizing the permanent magnet investigated. Results from finite element analysis on proposed structure are presented to verify concept.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

This paper presents a position-sensorless vector torque controller designed to achieve maximum efficiency over range of power and rotational speed for synchronous reluctance machine. A model the machine is presented which incorporates both winding core losses. It then shown that stator-flux-oriented control scheme can operation without position sensor at medium high electrical frequencies. For given torque, losses in are be function only stator flux magnitude. As convex level, optimal value...

The paper presents a three-dimensional finite-element analysis-based optimization of the overlap between adjacent stator teeth claw pole transverse flux permanent magnet machine (TFPM). Two major criteria are considered: 1) maximization output torque and 2) minimization cogging torque. shows that an almost 30% fulfills both criteria.

Previous studies have argued that a Multi-User Virtual Environment has the potential to foster creative collaboration, but empirical examine this claim are rare. With focus on architectural design, study investigated affordance of for production novel and appropriate solutions in remote collaborative environments. Forty-four participants produced design using online sketching collaboration. Four expert-judges assessed novelty appropriateness results, following Consensual Assessment...

It is shown that third harmonic current injection can produce higher shaft torque than conventional sinusoidal regulation in five-phase synchronous reluctance machines with salient-pole rotors. This paper investigates the field oriented control (FOC) including hysteresis-type PWM regulator of such under flexible injection. concluded be viewed as a special case combined fundamental plus 0 percent current. The FOC algorithm designed and developed model confirmed by simulation results...

Abstract The transverse flux permanent magnet machine (TFPM) is currently given an increasing attention, especially in electric and hybrid propulsion applications. Although significant improvements have been carried out on the earlier topologies, much work still required before TFPM can be regarded as a mature concept. Of particular interest cogging torque reduction which vital requirement applications, far passenger comfort concerned. present paper deals with, first step, three‐dimensional...

Abstract NOTE: The first page of text has been automatically extracted and included below in lieu an abstract Session 2502 TS/ 2 Development a Senior Elective for EE EET Majors + the Design Electronic Instrumentation Electric Vehicles * Maher E. Rizkalla, Richard Pfile, Ahmed El-Antably , Charles F. Yokomoto Purdue School Engineering Technology at Indianapolis Indiana University Delphi E., Indianapolis, IN This paper describes innovative ideas interdisciplinary EE/EET senior level course....

Much attention is focused upon the transverse flux permanent magnet machine (TFPM), especially in electric and hybrid propulsion applications. Although significant improvements have been carried out on earlier topologies, much work still required before TFPM can be regarded as a mature concept. Of particular interest cogging torque reduction which vital requirement direct wheel drive The paper describes principle of production double-sided TFPM, proposes an approach to its analytical...

The paper is devoted to a 3D finite element analysis based investigation of the cogging torque developed by three phase claw pole transverse flux permanent magnet machine. Following discussion different combinations 120/spl deg/-electrical angle shift between axially-arranged phases, we have found that topology where applied stator magnetic circuits most interesting from point view minimization. A deep this concept shows axially arranged phases are magnetically coupled leading unbalanced...

Purpose This study seeks to examine the analysis and control of a three‐switch three‐phase inverter (TSTPI)‐fed brushless DC motor (BDCM) as well comparison its performance with those yielded by six‐switch (SSTPI)‐fed BDCM drives. Design/methodology/approach The six operating sequences TSTPI‐fed drive followed implementation dedicated self‐control strategy in such given an SSTPI‐fed drive. Findings required integration torque loop scheme order reduce ripple amplitude during...

Heritage places are characteristically imbued with a multiplicity of meanings contingent on the specificities society, time and space in which such perceived. The interpretation also depends affordances representational medium through these perceived ways is socially deployed interpreted. Using ancient settlement Sirkap, located modern-day Pakistan, as case study, present article demonstrates that change entails archaeological records. Most conventional historical accounts Sirkap use...

This paper presents an analytical method of modeling permanent magnet motors. The model is dependent only on geometrical and materials data making it suitable for insertion into design programs, avoiding long finite element analysis. Modeling based the calculation air gap field density waveform at every time instant. allows rated performance but also such effects as cogging torque, ripple back-EMF form prediction, some which are neglected in commonly used models.

This paper develops the direct torque control (DTC) technique for five-phase synchronous reluctance motor (SynRel) using a digital signal processor (DSP). The mathematical model of proposed SynRel is first given. well-known winding function method used to derive inductances in order develop dynamic equations natural frame reference (a-b-c-d-e). transformation from stationary (a-b-c-d-e) system rotating (q-d-Q-D-n) remove angular dependency obtain voltage frame. terms currents then obtained...

The effects of accounting for material anisotropy on the energy performance characteristics axially laminated anisotropic (ALA) rotor synchronous reluctance motor (SynRM) are presented. These evaluated from simulation indirectly coupled magnetic field-electric circuit models which fully account saturation and space harmonics, to a time variant state model describing SynRM drive system. Furthermore, method accounts strong "material" "structural" exhibited in curved flux barrier regions...

In this paper, an optimum efficiency control scheme of synchronous reluctance motors is presented. There exists a variety combinations d and q-axis current which provide specific motor torque. The objective the controller to seek combination components, provides minimum input power, that is, losses at certain operating point in steady state. A small amount perturbation added d-axis reference for purpose searching power point.

A speed-estimation technique for induction machines, based on carrier signal injection and the standard two-axis smooth-air-gap machine model, is presented. The proposed can work over a wide range of operating points, including fundamental dc excitation. stability algorithm analyzed using two-time-scale approach. Based estimated rotor speed, torque controller designed. Experimental results are presented confirming validity this method to reduce ripple generated by injected signals also introduced