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Stepper motor are widely used for both, industrial and commercial applications because of their low cost, high reliability and high torque. The knowledge of mechanical parameters like load inertia and frictions are required in order to parametrize correctly the motor controller. Estimation of these parameters is possible with position sensors but they are expensive in comparison to the motor, furthermore...
Permanent magnet (PM) machines have been widely applied over the past few decades, such as renewable power generation, electric vehicles, domestic appliances, etc.
Regenerative shock absorbers (RSAs) can convert the kinetic energy originally dissipated in the dampers to electrical energy, with the help of electric machines [1, 2].
Over the past few decade, several novel linear motor topologies including switched reluctance linear motor (SRLM) and doubly salient linear motor (DSLM) have been extensively researched for long distance direct drive applications due to the increasing demand of low cost, low PM consumption and simple structure [1]–[2].
The paper deals with an approach to design the pole shape of inset permanent magnet fractional-slot tubular-linear synchronous machines (IPM T-LSMs). The study is initiated by a 2D finite element analysis (FEA)-based investigation of the effects of the pole-shaping on the machine no-load features. Such investigation is carried out while varying a single geometrical parameter: that is the angle characterizing...
The paper is devoted to a 3D finite element analysis (FEA)-based design and feature investigation of tubular-linear synchronous machines (T-LSMs) equipped with iron-assisted mover with segmented quasi-Halbach magnetized permanent magnets (PMs). The mover design-sizing procedure is initiated by an investigation of the influences of the width and the height of the iron rings, on the maximum value of...
Permanent magnet flux exchanging machine (PMFSM) with every single active part situated on the stator has a few appealing elements contrasted with customary induction machine because of its high torque and power density, better efficiency, simple and vigorous rotor structure, however, less were developed for downhole application due to harsh environmental conditions. In the past, a large portion of...
Modular arc-linear flux-switching permanent-magnet motor (MAL-FSPM) used for scanning system is researched in this paper by the finite element method (FEM). The MAL-FSPM combines characteristics of the flux-switching permanent-magnet motor and linear motor. It can replace the reduction gearbox and kinematic mechanisms and can realize the direct drive and limited angular movement. Structure and torque...
This paper proposes an advanced spoke type permanent magnet (PM) servo motor with high torque density. The optimizations of split ratio and trapezoidal magnet dimensions are performed, and unequal airgap is employed to reduce the cogging torque. The designed trapezoidal magnets are used in one 3 Nm prototype to remove the rotor iron bridge, which introduces heavy leakage flux especially for the brushless...
In this study, a novel, cost-effective consequent-pole interior permanent-magnet motor is designed to be applied in inverter-based air-conditioner refrigerant compressor. As the proposed motor has lesser magnetic usage, its performance variations based on four geometric parameters were studied. Moreover, a multi-target fuzzy-inference Taguchi method is employed to determine the best parameters combination...
Provided with the reduction of the cogging torque by skewing slots and simultaneously the decent output performance, an analysis of a permanent magnet synchronous generator (PMSG) is proposed in this paper. Firstly, the best skewing angle with the lowest cogging torque is found and validated with the finite element method (FEM) software, ANSYS/Maxwell. To overcome the repellence of the cogging torque...
Recently, the demand of two-degree-of-freedom mechanism rises as performance of electric machines improved. authors have already developed Two-Degree-of-Freedom Electromagnetic Actuator which is possible to drive in both axial and rotary direction. However, the performance in driving at the same time linear motion and rotation is lowered by magnetic saturation in the stator. In this paper, the performance...
In this paper, the permanent magnet motor without shoes of stator teeth was designed. In case of a shoeless motor, it is very easy to manufacture a stator with coil windings. It has, however, high cogging torque and torque ripples generally. The proposed model in this paper was designed considering cogging torque characteristic. The finite element analysis was performed to evaluate the effect of reducing...
In this paper, a 5kW novel modular multistage axial-flux permanent magnet machine (MM-AFPM) for EVs is analyzed. As key parts of the motor, electrician-ferrite teeth supports and SMC teeth supports are studied by 3D finite element method (FEM) respectively. No-load, full-load, harmonics, magnetic field distribution, etc. are calculated. FEM result indicates that SMC-materials have great advantages...
Interior permanent magnet (PM) synchronous motor (IPMSM) has been used in many fields, such as the air conditioner, electric tool, electric vehicles, etc., due to their high efficiency, high power density and wide speed range. However, the torque distortion and high cost of PM materials has limited the application of the IPMSM. In this paper, a technique to enhance the torque performance and minimize...
Flux switching (FS-) PM machines have gained lots of attentions in recent years, and many topologies have been proposed. In this paper, a quantitative comparison among regular PM machines including 12/10 slot/pole surface-mounted, spoke-PM machines and 12/10, 6/10, 6/13 slot/pole FSPM machines, especially the partitioned-stator one, is presented. Based on the finite element analysis, the electromagnetic...
The purpose of this paper is to propose a novel torque ripple reduction method for vibration and nose minimization of an interior permanent magnet synchronous machine (IPMSM) by adopting asymmetric notch lamination design (ANLD). The existing asymmetric lamination designs are limited to asymmetric barrier design (ABD) of rotor configuration in IPMSM. To highlight the advantages of the proposed method,...
This paper proposes an optimal design of brushless permanent magnet DC motor (BLDC) based on the capability of Particle Swarm-based Optimization (PSO) Algorithm and Genetic Algorithm (GA) in finding the optimal solution. The procedure makes use of slot opening, magnet length and air gap length as design variables. Cogging torque is treated as the performance indices. The proposed algorithms are more...
The recent activity of the authors, concerning different types of small PM machines, brought to the necessity to measure the respective cogging torques. Normally such a measure (including the hysteresis and bearing torque components), is realized with a prime motor to drag the machine under exam at very low speed and adopting a very good gearbox (classical method). During the activity a new method...
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