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A novel 4/4 stator/rotor single-phase doubly salient permanent magnet machine (DSPMM) with asymmetric stator poles is proposed in this paper. The stator poles of proposed machine are distributed non-uniformly along the circumference of the stator yoke. Firstly, it investigates the new topology and operation principle based on diagram description and mathematical derivation. Then, the dimension equation,...
This paper proposes a novel variable reluctance hybrid magnet memory machine (VR-HMMM), which is geometrically characterized by doubly salient structure having homopolar hybrid magnets alternatively mounted on the stator poles. The magnetizing coils are wound on the PM excitation teeth to vary the magnetization states of low coercive force (LCF) magnets, and hence the air-gap flux can be flexibly...
This paper proposes the ferrite magnet-assisted synchronous reluctance (FMASR) machine topology for use as direct-driven generator in low-speed micro-wind power applications. The FMASR generator consists of a stator core hosting three-phase distributed winding, and a transversally-laminated rotor having multilayer flux-barriers with embedded FMs in flux-concentration arrangement. Analytical model...
This article reviews calculation methods of the electric drive and generator based on the field regulated reluctance machine. It considers the initial data for design of the FRRM: power, voltage, nominal and maximum rotating speed. The article reviews optimal values for the stator and rotor of the FRRM. The FRRM is compared with a synchronous machine, a DC machine and an induction machine. South Ural...
This paper proposes a novel topology for a transverse flux machine (TFM) to address the three major issues associated with conventional TFM, namely: multi-stack poly-phase TFM, low power factor and difficulty in construction. The proposed machine has homopolar main field flux set by the rotor and a hetero-polar winding arrangement on the stator. Design equations and equivalent magnetic circuit model...
In this paper a systematic procedure for designing a switched reluctance machine (SRM) is given. The process starts with specified torque, speed and DC bus voltage and ends with stator dimensions, rotor dimensions and stator winding details. It is divided into three parts - machine configuration where number of phases, stator and rotor poles are chosen, magnetic design where the machine dimensions...
The paper presents a simplified reluctance equivalent circuit for a hybrid excited ECPMS-machine. This circuit allows determining an air-gap flux control and can be used to estimate the influence of a rotor central core flux barrier on the machine field-weakening capability. The presented equivalent circuit has been based largely on results obtained by predictions using 3D-FEA.
The mathematical model of a condenser induction motor with a hollow nonmagnetic rotor is derived in the form of a system of differential equations. Modes of start-up and steady motor motion are investigated, motor modelling is done in the software package Comsol Multiphysics to compare and evaluate magnetic circuit saturation degree. Ways of improving the motor are planned.
Vehicle dynamic depends on the power rating as it tallies the required initial acceleration and overall performance. If the vehicle motor operational characteristics provides high torque at constant power, the power rating of the machine can be reduced. Besides, extended constant power range can also recover more kinetic energy during regenerative braking. Therefore, a motor with extended constant...
This paper presents a nonlinear analytical model of a novel double sided flux concentrating Transverse Flux Machine (TFM) based on the Magnetic Equivalent Circuit (MEC) model. The analytical model uses a series-parallel combination of flux tubes to predict the flux paths through different parts of the machine including air gaps, permanent magnets (PM), stator, and rotor. The two-dimensional MEC model...
Harmonic content, magnetic saturation and simulation time can be an issue for the analysis of steady-state and transient behavior of electrical machines. Carrying the simulations with a finite-elements software results in long simulation time. To reduce the simulation time, this paper proposes a fast modelling method based on a coupled circuit whose magnetic couplings are identified with magnetostatic...
Without power electronics and mechanical gearbox, the permanent magnet induction generator (PMIG), a new grid-connected direct-driven wind generator concept, is considered to be a highly efficient, low maintenance solution for high capacity offshore wind power generation system. In this paper, the characteristics and optimal design method of this generator for wind power application are investigated...
The unified field permanent magnet dual mechanical port electrical machine (UFDMPM) is a kind of multiple inputs and outputs electromechanical energy transducer with two electrical ports and two mechanical ports, which is an ideal transmission system for Hybrid Vehicles and has advantages such as high integration, high efficiency and compactness. In this paper, a design optimization method is presented,...
This paper presents the analytical and numerical methods for computing synchronous motors with salient pole rotor without damper winding for industrial drives. The entire industrial drive system and its requirements considering the motor calculation accuracy are described in detail. This result is of paramount importance for the daily motor design and optimization of the entire system. The obtained...
This paper presents an enhanced Permeance Network Model (PNM) for embedded permanent magnet synchronous machines. PNMs are characterized by very fast and accurate results. Furthermore, this approach overcomes some weaknesses associated to analytical models, such as the impossibility of accurately predicting the embedded magnet machines behavior or taking into account the nonlinear behavior of the...
This paper investigates the static demagnetization behavior of flux-switching permanent magnet (FSPM) machines during normal operating conditions. A combination of spatial harmonic analysis, magnetic equivalent circuits, and finite element (FE) analysis has been used to study the flux paths associated with the stator windings and their interaction with the permanent magnets (PMs) located on the stator...
The paper proposes a new compound-structure transverse flux permanent-magnet synchronous machine (CS-TFPMSM) system to fulfill power split for hybrid electric vehicles (HEVs). The key component of this system is one brushless transverse flux dual-rotor machine (TFDRM) which originates from transverse flux machines. The TFDRM can realize speed adjustment and torque transfer. The structure and operation...
In this paper the authors introduce a type of transverse flux reluctance machines (TFRM) in a special lightweight construction method with a disc-shaped rotor. The device uses soft magnetic composites (SMC) for the magnetic circuit, which allows complex stator geometries. Basic design principles concerning the magnetic circuit, torque and power output are described. A crucial point in this paper is...
This paper proposes a systematic process of a multi-objective optimal design of an axial-flux permanent-magnet motor for electric scooters. In the preliminary design, the zero-dimensional magnetic circuit model is used to determine the numbers of slots and poles and the initial size of the motor according to the driving requirements of scooter. In the optimal design process, the one-dimensional magnetic...
Airborne high-speed synchronous generators rated in the power range of megawatts have been discussed. These generators are nowadays necessary for new aerospace missions, such as directed energy weapon (DEW) and airborne radar (AR). Requirements, ferromagnetic materials for magnetic circuits, electromagnetic design and cooling techniques for high-speed multimegawatt generators have been discussed....
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