The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper deals with the optimization of a single side Axial Flux Permanent Magnet machine (AFPMM) designs with respect to cogging torque. Although the AFPMMs run generally at high speed and high torque, these machines may run at lower operational speed for aircraft applications. At lower operational speed, the cogging torque is an undesirable effect. Firstly, a reference AFPMM is designed with Finite...
A Ladybird High Speed Synchronous Reluctance Machine (LB-HS-SynRM) with deterministic rotor parameterization has been studied. The primary aim is to derive design rules for SynRM optimization with a novel Ladybird rotor topology. The second goal is to investigate the effect of parameters on machine performance. The 3D nature of the rotor can only be handled by 3D FEM simulations, therefore, 3D FEM...
To numerically analyze the electromagnetic torque of the induction motor with skewed slots, accurate and timely computation of the airgap flux density (AGFD) is required. Two-dimensional multi-slice finite-element method (2-D multi-slice FEM) is typically used in the computation of the AGFD in the induction motor with skewed slots. However, in order to achieve high accuracy, the number of the slices...
Precise simulation of permanent magnet synchronous motors (PMSM) is the most important part in many cases particularly in their fault diagnosis and optimal control. This paper introduces different simulation methods of PMSM where finite elements method (FEM) is chosen as computation tools. The logic and problem solving is investigated and positive and negative points are described. Then, the trend...
The performance of permanent magnet eddy current speed-control device is closely related to the material properties of each component. In view of different permanent magnets, a three-dimensional finite element transient model of 500kw permanent magnet eddy current speed-control device is established. The finite element method is used to calculate torque, loss and output power of the permanent magnet...
This paper presents the effects and importance of the rotor design parameters on the performance of a permanent magnet assisted synchronous reluctance motor (PMaSynRM). At the beginning of the design, number of stator slots and rotor flux barriers are considered. Rotor design parameters such as different insulation ratios and magnet positions are investigated after choosing the number of stator slots...
BLDC-MRM is a brushless salient rotor multiple phase (m) stator reluctance machine fed with bipolar two-level-flat-top electronic controlled phase currents where mF phases play as “field” phases and mT=m−mF phases play as “torque” phases, like in a dc brush machine with brushes off the neutral axis and without dc excitation.
This paper presents a four stator-pole stator-ferrite permanent magnet synchronous machine single-phase self-starting small motor drive in terms of: adopted topology, FEM assisted optimization design and controlled dynamic model simulation results for PN=85W, IN=0.65A, VDC=290V (single phase inverter fed), nN=3000rpm, for an electrical efficiency of 87%.
This paper describes the design and prototyping process of outer rotor permanent magnet generator meant for the use in small scale wind turbines. The initial design of the machine is presented. Main issues and phenomena, affecting the generator design, such as cogging torque and its reduction possibilities, selection and demagnetization risk assessment of permanent magnets, machine losses and thermal...
Nowadays the comfort in passenger transport system is very relevant. One source of noise and vibration is the torque ripple. Torque ripple can be generated by an inappropriate machine control tuning and by the inherent torque ripple of the machine. In permanent magnet machines, the inherent torque ripple is composed by three components: electromagnetic torque, reluctant torque, caused by the winding...
We investigate the feasibility of model predictive control (MPC) in ocean current turbine (OCT) control. A prediction model is obtained from a nonlinear model of a moored OCT via linearization. Three control inputs are assumed, the electromechanical torque applied to the rotor shaft and two blade pitch cyclic controls. The control problem contains is highly constrained, which prompts consideration...
Gears now a days are being used in almost all mechanical machines. These gears also add inertia to the drivetrain, which has to be decreased in order to decrease the losses. Hence changing the shape of the gear disk to decrease the weight is a pressing factor. This paper discusses about the arrangement of the pockets so as to get the least stress. The values of the loads are for an All-Terrain Vehicle...
Salient pole wound field synchronous machines (WFSMs) are widely used for various electric power generation, such as hydro and wind generators [1], because there is free of permanent magnet and it can be directly controlled by the DC winding.
Since electric vehicle drive system has high requirements, traction motors should be design and controlled with high output power performance throughout the entire driving range as well as with high torque performance at low speed range.
Nowadays, with the increasing concerns on global environment pollution and energy security, electric vehicles (EVs) have been regarded as the potential to offer a solution for transportation [1].
This paper analyzes the effect of rotor bar inclination on starting torque, operating torque and operating efficiency in squirrel cage induction motor(SCIM) with finite element analysis method. The results show that the optimum inclination of rotor bar improve all the performances together. An application to the 3.4kW SCIM shows that the starting torque is increased from 17.53Nm to 17.64Nm, and the...
Nowadays the majority of applications are demanding more and more compact, cost effective and robust solutions for their electric drives. In this context permanent magnet synchronous machines are considered as a good candidate due to their high torque density. This torque density is obtained thanks to high power rare earth magnets with both high remanence and high coercive force. However, the magnets...
In this paper the separation of volume and surface forces and torques of a highly saturated DC excited Flux Switching Machine (DCFSM) is presented. The volumetric and surface forces are derived from the stress tensor caused by the magnetic field. High saturation of the iron will contribute in the increase of the internal forces, as a consequence, the resultant torque is also separated in volume and...
In this paper the effects of saliency and cross-coupling in a cylindrical wound-rotor synchronous motor are evaluated within the operating region of the direct-axis, quadrature-axis and field excitations. In the calculation of the wound-rotor synchronous motor parameters, a finite element based approach (principle of frozen permeability) is followed to evaluate the inductances and flux linkages of...
Variable flux reluctance machines (VFRMs) are viable candidates for automotive applications. This paper investigates the field weakening capability of a 12/10 VFRM. Starting with voltage and toque equations, the paper reveals the relationship between torque-speed characteristics and the current arrangement (slot division) of both DC-field and armature windings. The method for expanding the working...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.