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The objective of this paper is to optimize the structural parameters of the Permanent Magnet Drive by minimizing the manufacturing costs while maintaining the output performance. The electromagnetic analysis of the Permanent Magnet Drive is carried out by the Finite Element Method. In order to debasing the cost of calculation and time, the rapid calculation model which can map the relationship between...
This paper introduces a design method of line-start permanent magnet synchronous motor (LSPSM). The structure of stator lamination, rotor lamination and stator windings are designed. Finally, the starting process of the motor is simulated by ANSOFT according to its model. By simulation, the distribution of magnetic and the starting performance of motor are presented.
A double-stator slotless permanent magnet (PM) machine for wind generator has been designed in this paper. This machine inherits the merits of double-stator PM machine, high torque density and high utilization rate of the space and material. At the same time, Because of having no cogs and slots the cogging torque has been eliminated and the starting drag torque has been reduced dramatically. The performance...
For the problem of analytical method has lower precision while numerical method consuming much time in calculating Line-start Solid Rotor Permanent Magnet Motor, this paper analysis and compares the advantages and disadvantages of these methods, using field and analytical collaboration method for analyzing a prototype. It calculates the no-load air-gap flux density, back-EMF, and full-load starting...
A novel doubly excited brushless machine (DEBM) with the radially laminated magnetic barrier rotor (RLMB-rotor) for variable speed system is built, and the prototype machine of 250kW/1200rpm has 10 rotor pole numbers. The performance studies of the sample machine are presented by using the 2D transient finite element analysis model and the experimental method. The magnetic fields, the electromagnetic...
The Axial-Flux Solid Aluminum Rotor Induction Motor (AFAIM), which is Electro-dynamic System [1–2], is presented in this paper. The system creates electromagnetic field by 3-phase alternating current in primary winds, induct eddy field in secondary and create lift and thrust force. This paper establishes a 2-D sub-loop electro-magnetic model, studies the dynamic characteristic of the maglev, gets...
The recent progress in soft magnetic composite (SMC) material has made it an alternative for motor armature core material to silicon steel. The manufacturing process of armature core made of SMC can be greatly simplified by extrusion moulding. Moreover, the isotropic characteristic of SMC enables more flexible structure designs for electric machines compared with the 2D flux distribution of traditional...
This paper describes a small wind turbine generation system with synchronous reluctance generator (SynRG). SynRGs are robust and inexpensive. In addition, SynRG has no cogging torque. Hence, wind turbine generation system with SynRG can achieve smooth start at low wind velocity. The rotor design of proposed SynRG is multi flux barrier type. With the finite element analysis (FEA) software, the characteristics...
This paper presents a semi-analytical method to computer the air gap magnetic field of direct drive permanent magnet (PM) torque motors for being evaluated slotting effects accurately. The field region is divided into the smooth air gap region and the extended slot sub-regions. The magnetic vector potentials in the air gap region are first solved by the analytical method, and those in the extended...
This paper deals with optimum design criteria for maximum torque density & minimum current density of a single phase line-start permanent-magnet motor (LSPMM) using RSM (Response Surface Methodology) & FEM (Finite Element Method). The focus of this paper is to find a design solution through the comparison of torque density and minimum current density resulting from rotor shape variations....
The interior permanent magnet synchronous motor (IPMSM) is usually applied to the traction motor in the hybrid electric vehicle (HEV) and the electric vehicle (EV) due to its high-power density and wide speed range. In this paper, the IPMSM with concentrated winding for a 110cc electric motorcycle is introduced. In order to make the model operate correctly at high speed, optimization has to be performed...
This paper presents a design and analysis of a novel permanent magnet embedded salient pole (PMESP) for PM synchronous wind generator (PMSWG). A lumped parameter magnetic circuit model (LPMCM) of the salient pole is established to design its main dimensions. The magnetic field distribution, electromagnetic performance and external characteristic of a 3MW generator with PMESP are analyzed by the finite...
Analytical calculation method of electromagnetic torque in time domain for multiphase permanent magnet machines is presented. And the accuracy of the proposed method is verified by FEM. The effectiveness of the harmonic current injection to boost torque density is confirmed by analytical results and also proven by FEM simulation. The torque characteristics of a nine-phase permanent magnet machine...
This paper presents the numerical analysis of a vector controlled permanent magnet synchronous motor (PMSM) by using circuit-coupled two-dimensional finite element method. The goal of the research was to estimate the performance of a vector controlled PMSM. In order to analyze the machines under rotating magnetic fields, the voltage source, symmetric boundary and slide boundary are considered. And...
The paper presents the study of two permanent magnet synchronous machines, with outer rotor, dedicated for electric scooter applications. The electrical machines will be analyzed in order to assure the most suited scooter propulsion. The variety of topology is basically obtained through specific winding configuration and poles/slots ratio. The design results are validated numerically through finite...
The rapidly developing wind power industry demands high power generators. Direct driven permanent magnet synchronous generator (PMSG), which has the advantages of high drive train efficiency and high reliability, is promising in wind turbine applications, especially offshore. It is known, that direct driven PMSG is heavier than its geared counterparts, which increases the cost and may bring up engineering...
The design feature and performance analysis based on circuit-field coupled finite element analysis of large scale direct-driven permanent magnet (PM) generators are introduced. Some experimental results are presented. The simulation and experimental results of a 1.5MW PM wind generator show that the pole-slot number combination has an important impact on the machine properties, and the optimization...
The permanent magnet synchronous motors are widely used in various industrial applications due to many advantages such as high power density, high efficiency, low manufacturing cost and so on, but cogging torque and moment of inertia are the most important factors affecting the performance and control precision. In this paper, firstly, the cogging torque can be effectively reduced by taking the auxiliary...
The paper deals with AC motor optimization. Optimized machine is three phases 14kW Surface Mount Permanent Magnet (SMPM) machine intended to work with servo amplifier. The optimization is based on Self Organizing Migrating Algorithm — SOMA with strategy "All to One". Artificial intelligence algorithms are effective methods for searching global extremes of the objective functions. Target...
This paper presents a comparison between results, for two methods of obtaining the values of “d-axis” synchronous reactance Xsd and “q-axis” synchronous reactance Xsq, of the permanent magnet synchronous motor with radial magnets (RPMSM). The paper provides a background describing the benefits of using the RPMSM machine and how the synchronous reactance parameters are valuable in determining stability...
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