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This paper presents an analytical method for calculating the magnetic field for a permanent magnet spherical motor (PMSM) with double polyhedron structure. For the PMSM, stator coils and cylindrical permanent magnet (PM) poles locate at the fixed point of octahedron and hexahedron, respectively, and provide the uniform magnetic field. To analyze the magnetic field in the spherical coordinate, the...
A novel Finite Element Controller Map (FECM) method for the speed control of a saturated induction motor (IM) drive is presented in this paper. The newly developed algorithm is based on approximate functions in finite elements, which are expressed according to the nodal values of output response of the IM drive. The map complexity depends on the nodes assigned within a discrete element. The proposed...
Structural defects in the rotor cage of large electrical machines significantly impact their expected operational lifetime. This work simulates the stresses developed in a damaged rotor cage during different transient profiles and for different sizes of the imperfection. A combined model featuring electrical, thermal and mechanical stages as well as three different meshes reflecting a progressing...
This paper proposes a new intelligent control for an indirect vector controlled induction motor drive for high performance, based on a finite element controller map. The traditional basic conventional algorithm (PI controller) has been successfully used to obtain decoupling control between the rotor flux and the torque. The basic PI has fixed gains that cannot be increased beyond certain limits. In...
The fine analysis of rotor losses of induction motors requires separation of the slip- and high-frequency electromagnetic quantities under load conditions. However, the conventional method involves a full slip-cycle finite element simulation, which is very expensive in terms of CPU time and memory usage. To obtain a precise iron loss prediction with reduced time consumption, this paper proposes three...
High speed motors rotating at speeds above 10,000 rpm are gaining more attention nowadays for various high performance applications. High efficiency and reliability are demanded by the applications like centrifugal compressors, pumps, machine tools, drills, aerospace etc. This paper presents novel design and analysis of a high speed axial flux permanent magnet motor for high speed, low power applications...
The induction motor with skewed rotor bars is an effective motor structure for eliminating the slot harmonic fields, and the resulting noise and vibration. 2-D multi-slice finite element method (FEM) is typically used to analyze the performance of the induction motor with skewed rotor bars. However, in order to achieve high accuracy, the number of the slices is generally very high, which is also a...
In this paper, three different models of friction in presliding regime on linear motor platform are deduced according to basic physical laws, which are named as the Kelvin model, the modified Kelvin model and the four-element model. To validate the effectiveness of these models, the particle swarm optimization is applied to determine the coefficients in each model. Then experiments of ramp input force...
Many real dynamical processes in control engineering practice can be modelled as a first order plant with saturation at its input. This paper proposes a new solution to control such plants, which is a combination of discrete-time first-order sliding mode (SM) control and discrete-time realization of super twisting control algorithm (STA) that is commonly used in second-order SM. A brief mathematical...
Based on the fact that the three-phase induction machine proves higher performance under six-phase supply, which was demonstrated in Part 1 of the paper, this work investigates the fault-tolerance capability of the six-phase structure with asymmetrical configuration (30° phase shifting both for space and time conditions). It is taken into discussion the cut-off of one, two and three phases respectively...
This current paper is a continuation of authors' previous paper [1] in which they began to bond induction machines' (IMs) vector diagrams with Finite element method (FEM). Today, as a numerical method, FEM is widely used for magnetic field calculations due to its accuracy and fast experimental prototype modeling. The goal of this paper is to theoretically introduce readers with a new methodology for...
Generally three phase motors are better than single phase motors but three phase system cannot be used in many applications for house. Especially single phase motors are used in city centers because of structure of the single phase feeder system. In general, small powered single phase motors in the range of 0.18–1.5 kW are used in small workplaces, portable hand looms, homes, fans, kitchen equipment,...
This paper presents a thrust ripple reduction method for a double-sided linear switched reluctance motor (LSRM). A structure of motor is back-to-back mover LSRM. The spatial arrangement of the stator is investigated in order to reduce the thrust ripple. The thrust distribution generated by a phase of the LSRM is computed by finite element method (FEM) analysis. Based on numerical results of FEM analysis,...
This works deals with preliminary investigations of an induction machine supplied with voltage containing interharmonics using finite element method. The results of computations in ANSYS Maxwell environment were compared with results of measurements. The investigations were performed for a machine of rated power 3 kW for various interharmonic frequencies.
The paper presents the possibility of using a two-dimensional field-circuit model of a squirrel cage induction motor for qualitative tests of the axial leakage flux course used in non-invasive diagnostics of induction machines. The study considered the reduction of leakage fluxes associated with the stator and rotor winding to the zero component of the symmetric components system. A qualitative comparison...
This paper deals with the transient analysis of direct-on-line synchronous reluctance motor (SynRM) with symmetrical distributed rotor cage bars. Finite Element is utilized to analyze the transient behavior in both synchronized and unsynchronized regimes of the direct-on-line SynRM. In this paper two Synchronous reluctance motors are modelled and analyzed. The first motor is referred to as SynRM1...
This paper deals with an analysis of the design parameters and its influence on performance of the linear induction motor (LIM). LIM propels using Lorentz force generated by interaction between magnetic flux of the primary and eddy current induced in secondary. As depending on the size of the primary and the secondary, not only magnetic flux and induced eddy current, but also performances of the LIM...
The development of Condition-Based Maintenance and Prognostics and Health Management systems can be fostered by models that accurately reproduce the effects and propagation of faults. Conventional methods applied to the analysis and simulation of rotor asymmetries in induction machines are based in the classical 2-D finite element approach, which is unable to reflect its complex effects, such as interbar...
Two original numerical techniques are presented for the finite-element (FE) unsteady analysis of permanent magnet synchronous motors (PMSM) and induction motors (IM) operating in demanding aerospace applications. The first technique is the electromagnetic and thermal analysis weak coupling using a multi-slice FE model. The advantage of this technique is the representation of complex actuator geometries...
In this paper, we present the performance of massively parallel processing in finite element electromagnetic field analyses with time periodic explicit error correction. The Domain decomposition technique is used for parallelization, and the Message Passing Interface (MPI) library is used for processing communications. Results show over a 64-fold speed increase compared with the sequential solver,...
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