1,721,148 research outputs found
Analytical formulation for design and optimization of permanent magnet arrays
No full textRare earth permanent magnet arrays are extensively used in many electromagnetic devices. Their
preliminary design can be eased by the analytical approach presented in this paper. It allows a fast evaluation of the flux density distribution and of the winding flux linkage and induced emf as functions of the configuration parameters and therefore can be particularly profitable to optimise the electromagnetic configuration
Analytical formulation for the torque enhancement of PM single-phase motor by a stator auxiliary magnet and a slotted PM rotor
No full textThe paper proposes an analytical formulation to calculate the torque generated by the
interaction of two bonded permanent magnet (PM) rings, one of which slotted. Such procedure can be
profitably used to improve the starting torque and mitigate both the slot cogging torque and the load
torque ripple of single-phase brushless motors, provided with an auxiliary stator PM and a main rotor PM
having suitably spaced slots on a portion of its length. The example of application show the benefits of the
such arrangement with respect to a conventional PM design
Automated Procedure for the Performance Improvement of a Low-power Single-phase Synchronous Motor
No full textThe performance of a low power line-start single-phase synchronous motor is evaluated via a mathematical model, elaborating the results of an automated sequence of magnetostatic FEM analyses. Such an approach remarkably speeds up the transient simulation with respect to a commercial FEM code for the transient analysis, allowing analysis of the influence of the parametric variations in a reasonable lapse of time. An optimization procedure based on such a technique could be profitably applied to a self-starting single-phase synchronous motor
TECNICHE AVANZATE PER L'ANALISI DI MACCHINE ELETTRICHE A MAGNETE PERMANENTE CON ANSYS MAXWELL
No full text
Equivalent circuit for the dynamic analysis of a PM synchronous generator/back-to-back converter drive for VAWT applications
No full textThe paper presents an equivalent circuit summing up both the dynamics of the drive kinematic train and the quasi-steady state electric behaviour of a wind generation drive based on a vertical axis wind turbine gearlessly coupled to a permanent magnet synchronous generator, interfaced to the main grid by a back-to-back converter. By the implementation of this circuit in the Simulink® environment, it is possible to analyze both the steady-state operation and the mechanical transients due the wind turbulence. In particular, a sensorless configuration for the maximum power point tracking is considered. In the example of application, the influence of different control architectures and converter structures on the system performance (i.e, effectiveness of the angular speed control, rms armature current, energy yield) is investigated
A Magnetic Network Approach to the Transient Analysis of Syncronous Machines
Full text linkThe technique for the simulation of the dynamic
behaviour of rotating machines presented in the paper is
based on an equivalent circuit representation of the magnetic
configuration. The circuit parameters are obtained by a preliminary
automated sequence of magnetostatic FEM analyses
and take into account the local magnetic saturations.
The adopted solution technique is based on an invariant network
topology approach: its application, here presented for
the operation analysis of a low-power synchronous generator,
allows a great reduction of the calculation time in comparison
with a commercial FEM code for the transient simulation
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