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Static measurement characteristics of the double rotor switched reluctance motor developed on the basis of double salient dual air-gap structure is put forward in this paper. The reduction of the air - gap length of the conventional machine is constrained by the mechanical intolerances that inherit the torque generating capability. Therefore there is always a limitation on the air-gap length. However,...
This paper presents a novel flux barrier type outer rotor interior permanent magnet (IPM) motor which has both rare-earth and ferrite magnets. The proposed IPM motor has two air layers in the outer rotor. The rare-earth magnets are inserted into the first layer, while the ferrite magnets are placed into the second one. The torque performance of the proposed IPM motor is larger than that of the conventional...
Permanent magnet synchronous motor (PMSM) has been used to drive a number of vehicles. PMSM has high torque density, high efficiency and wide speed range. However, the high cost of permanent magnets is viewed as a disadvantage. This paper presents a technique that can increase the torque density by modifying the shape of permanent magnets and minimizing the magnet volume. Models were compared by increasing...
A through comparison of the Interior Permanent Magnet (IPM) and Surface mounted Permanent Magnet (SPM) type Brushless DC Motor (BLDCM) performance under Inter-Turn Fault (ITF) condition, proving which model is more preventable in the ITF condition. In order to confirm these configurations, we have compared factor of ITF due to vibration source and electromagnetic characteristics such as cogging torque,...
The modal analysis based on ANSYS for all the components of the train wheel-bearing of NJ(P)3226X1 had been carried out. The vibration of each component was excited by the hammer with an accelerometer. The respondent acoustic signals were acquired by the microphone and the natural frequencies were obtained. The comparison between the computation using ANSYS and the measurements had demonstrated the...
This paper deals with torque harmonic characteristics of induction motor for electric vehicle (EV). For calculate phase stator harmonic leakage flux of a three phase induction motor, an analysis method is determine relationships with stator teeth design. In particular, torque harmonics including EMF harmonics at whole speed ranges are analyzed by the finite element method (FEM). Torque harmonic components...
In this paper, we developed stator and rotor shapes of interior permanent magnet type brushless motor for automotive cooling device in order to obtain better performance than the prototype. Response surface methodology (RSM) is employed in this paper as an optimization method. Finite element computations have been used for numerical experiments on geometrical design variables in order to determine...
Finite element analysis is the most widely used numerical method for transient and steady state solutions of both 2D and 3D electromagnetic problems. It permits accurate modelling of complex geometries with non-linear material properties.
In this paper, it is shown that the split ratio of stator inner diameter to outer diameter influences the torque density in Switched Flux Permanent Magnet (SFPM) machines more heavily than that of conventional Permanent Magnets (PM) machines, since PM are inserted in the stator for SFPM machines. This paper presents a simplified Magnetic Circuit Analysis(MCA) method to analytically optimize the split...
This paper deals with optimum design criteria to minimize the torque ripple of a concentrated winding Synchronous Reluctance Motor (CW-SynRM) using Response Surface Methodology (RSM).
For a robot hand to make a stable contact with its environment and perform various tasks, it must be equipped with torque sensors to accurately measure its torques. However, conventional torque sensors are too bulky and expensive to be used for a robot hand. To cope with these problems, in this study, we propose a novel 2-DOF torque sensor, which uses the link frame of a robot hand as the torque sensor...
To investigate the response of posterior cruciate ligament rupture on the biomechanics of other principal ligaments, the MRI images of normal human knee at various flexion angles(0¡ã,25¡ã,60¡ã and 80¡ã)were developed through SONATAMESTRO 1.5T and the intact and posterior cruciate ligament deficient knee models were built based on these images. Then three different loads were applied to these models...
The present paper introduces a novel hybrid design methodology for surface permanent magnet synchronous machines. The method combines analytical and optimal design with finite element method (FEM) analysis, in order to obtain the best prototype that meets specific requirements. High efficiency and minimum cost is aimed through analytical and optimal design, while high torque capability and low cogging...
Due to their high efficiency and reliability, permanent magnet synchronous machines are widely used in automotive applications. The present paper deals with the design and analysis of a special topology of a permanent magnet synchronous machine (PMSM) suited for integrated starter-alternator (ISA). A preliminary design procedure is presented and the results are introduced in FEM based software in...
In finite-element analysis of electrical machines, torque is typically computed using a method based on Maxwell's stress or virtual work. The accuracy of these methods is sensitive to the quality of the finite-element mesh in the air-gap region. The effects of the spatial discretization on the computed torque are studied. Power balance of the electrical machine is used as a reference to assess the...
In this paper there are researched and compared three types of cylindrical magnetic couplers (MC): active MC, reactive MC with yoke and reactive MC without yoke. The comparison is made by the couplers' maximal mechanical torque, which is their main characteristic. The torque is calculated applying software QuickField by designing the magnetic field. The QuickField is based on the finite elements method...
In order to model the gearbox and global wind turbine system with higher accuracy in short time, this paper focuses on the methods of multi-body dynamic modeling and wind turbine dynamic simulation on the platform of S4WT. By introducing the multibody system and super element approach, a steady-state response is simulated on one 1.5MW gearbox. Through calling S4WT parametric model, a dynamic response...
The objective of this work is the calculation of forces and torque for a new type of motor, the harmonic motor, intended specifically for operation of brakes in vehicles. The motor offers the promise of eliminating a number of design limitations of existing electromechanical actuator systems. First, the motor eliminates the need for a gear set. This reduces the complexity of the package, which could...
This paper presents the modeling and simulation of an axial field, single-pole, single-phase switched reluctance motor. The analysis starts with a 3D FEM-based simulation, which has as main purpose the determination of magnetization and torque characteristics. Then, the obtained data are implemented in the mathematical model built in the Matlab/Simulink environment in order to simulate the dynamic...
This paper presents a dual approach concerning the influence of unbalanced supply voltage on the three-phase induction motor operation. On one hand, a FEM-based analysis examines the ill effects upon the magnetic field, as main concern, and a few electric and mechanical parameters. On the other hand, a study of the transitory regime (including no-load startup and sudden loading) is employed under...
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