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This paper proposes some designs of Switched Reluctance Motors (SRMs) for electric hand tools. Since the SRM needs larger current than conventional permanent magnet motor to output the torque, it is necessary to consider the thermal characteristics in the design of SRM. In this paper, some SRM design methods which target is to satisfy the thermal condition and torque-speed characteristics of the conventional...
Flux reversal permanent magnet machines (FRPMMs) exhibit many advantages such as simple rotor configuration, high torque density, fast transient response, etc. However, the general design procedure of FRPMMs has not been established. Thus, this paper mainly focuses on developing a design methodology of three-phase FRPMMs. First, the sizing equations are analytical derived based on a magneto motive...
This paper presents a perspective regarding the design concepts of a small induction machine used for electrical steering systems. The particularity of this view is given by the fact that besides the output imposed parameters the geometrical dimensions are subject to major constraints. In these conditions there are some theoretical aspects that limit from the start the design choices that can be made...
This paper presents an optimization design and analysis of a 30kW V-type interior permanent magnet synchronous motor (VIPMSM) with distributed winding used in electric vehicles using finite element analysis (FEA). In order to reduce cogging torque, increase efficiency and avoid using winding skew, 48 slots 10 poles V-type fractional-slots IPMSM is selected in the design. Structure optimization including...
The doubly fed induction generator (DFIG) is the most popular choice for wind energy generation systems. The cost and difficulty incurred in the maintenance of the slip rings has led to the development of the brushless DFIG. Amongst other design options, the brushless DFIG can be realized through the use of rotary transformers (RTs). Due to the low operating frequency of the rotor currents, a RT used...
The purpose of this work is to compare two optimization approaches, used for the research of optimal configurations of electrical machines. The first one uses a single multiphysical model, called “reference model”, directly used by a classical optimization routine. The second approach proposes the use of a second surrogate model in association with the previous reference model. This second configuration...
This paper proposes the application of analytical scaling laws on existing saturated flux-linkage and loss models for synchronous permanent magnet and reluctance machines. This scalable model is used for fast and accurate calculation of efficiency/loss maps and can also be used for drive cycle analysis including energy consumption. The scalable model is verified by comparison with existing state-of-the-art...
In this paper an optimized design procedure for the axial flux permanent magnet synchronous machines (AFPMSMs) for large scale wind turbines is introduced. In this paper, the design for a 5MW wind turbine AFPMSM is introduced, analyzed, and validated. In this design, an efficient analytical model is used that is capable of obtaining all the electromagnetic parameters in a very accurate way. The structural...
The magnetic flux density distribution in the airgap of electric machines is essential for accurate prediction of no-load eddy-current power losses. The effect of slotting can be modelled using a simplified single-slot model or a complete multiple-slots model. Until now there has not been a clear and justified criterion to choose between the two models. In this paper we propose a criterion based on...
This paper presents an accurate and fast iron loss evaluation method using the play hysteron model for the hysteresis loss and one-dimensional Finite Element Analysis (FEA) for the eddy current loss. This approach is applied for an Interior Permanent Magnet Synchronous Machine (IPMSM) fed by Pulse Width Modulation inverter. The simulation result is compared with the measurement. It is also compared...
This paper provides the fundamentals of integrated motor-drive system design knowledge which could be used as a basis to change the existing machine design approach from being a separate machine design tool to a more advanced engineering package. Various user's preferences including motor performances at transient, rated and flux weakening operations along with the inverter quality are studied by...
In this paper, an elevator's drive system is thoroughly examined in order to improve its operation, in terms of reducing the energy consumption. Vector control is used for the drive system and the simulation results are compared to a real application's measurements. In order to reduce the total energy consumption of the system, the conventional braking system is replaced by a regenerative braking...
In this paper, simulation and experimental results of a squirrel cage six-phase induction generator (SC6PIG) are presented. The proposed generator, suitable for grid connected multiphase wind energy generating system, is composed of a 24kW SC6PIG prototype connected to a full scale back-to-back converter structure. The aim of this paper is to validate experimentally the simulation model of the whole...
This paper deals with a new method of on-line stator resistance identification based on model reference adaptive systems (MRAS) technique for high performance sensorless speed control of interior permanent magnet synchronous motor (IPMSM) drive. In order to estimate the rotor position, a nonlinear position observer algorithm based on the IPMSM fluxes is proposed. The nonlinear observer is constructed...
Due to the advantages of high torque density and simple mechanical structure, vernier permanent magnet (VPM) machines have attracted more and more research interests. In this paper, the inductance non-linearity of an advanced concentrated winding (CW) VPM machine is investigated with consideration of both magnetic saturation and cross coupling saturation. Then, the mathematical model with variable...
This paper investigates the torque ripple modeling and minimization for interior permanent magnet synchronous machine (PMSM). At first, a novel torque ripple model is proposed. In this model, both spatial harmonics of magnet flux linkage and current time harmonics induced by machine drive are considered, which includes the torque ripples resulted from magnet torque, reluctance torque and cogging torque...
Fractional slot concentrated wound-interior permanent magnet synchronous generators (FSCW IPMSG) have potential for wind power generation application because of their high power density, high efficiency, compactness and low cogging torque. This paper evaluates the dynamic performances of a FSCW IPMSG when operated below and over the rated speed. The existing vector current control strategy developed...
This paper presents a constrained direct speed control (DSC) of a permanent magnet synchronous motor (PMSM) under high temperature conditions, based on model predictive control. Following the classical control theory, a nonlinear state-space model (SSM) of PMSM has been developed. A discretization of the SSM has been performed in order to achieve a digital prediction algorithm, suitable for implementation...
The two-individual current control loops and vector space decomposition (VSD) control for a dual 3-phase PMSM are compared and investigated in this paper. It is found that the VSD control has more flexibility on controlling the fundamental current in αβ sub-plane and the fifth, seventh current harmonics in z1Z2 sub-plane with different PI gains, while the two-individual current control is equivalent...
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