A New Design Procedure for Rotor Laminations of Synchronous Reluctance Machines with Fluid Shaped Barriers

Abstract

A new procedure for the design and optimization of the rotor laminations of a synchronous reluctance machine is presented in this paper. The configuration of the laminations is symmetrical and contains fluid-shaped barriers. The parametrization principle is used, which executes variations in the lamination geometry by changing the position, thickness and shape of the flux barriers. Hence, the optimization procedure analyzes the various configurations through finite element simulations, by means of the communication between MATLAB and Flux 2D. In the post processing stage, the best geometry which optimizes mean torque, torque ripple, efficiency and power factor is selected. Once the best rotor configuration is defined, further investigations allow improving its performance by modifying the current angle, the stator winding and the thickness of the radial ribs.

Circular Economy Aspects of Permanent Magnet Synchronous Reluctance Machine Design for Electric Vehicle Applications: A Review

“…On the other hand, the radial ribs create a potential short-circuit through the flux barrier. As a cross saturation effect occurs, it reduces the saliency ratio and the torque output [187]. Increasing the number of radial ribs and reducing their thickness can balance the mechanical load and electromagnetic distribution [188].…”

“…For optimal results, it is recommended to use a curved flux barrier that follows the natural path of the flux lines [128]. Fluid-shaped barriers [187,190] are the top choice as they obstruct the direct direction (d-axis) flux path less compared to rectangular barriers and show similar behaviour in the quadrature direction (q-axis) than other types of SynRM (see Figure 12). This results in a higher saliency ratio, torque output, and less torque ripple [188].…”

“…This results in a higher saliency ratio, torque output, and less torque ripple [188]. The disadvantage of this topology from the design point of view is that it is impossible to precisely approximate the splines of the barrier with most of the FEM solvers using linear elements [187], for example, in the case of the most widely used open-source solver FEMM [191]. Isogeometric analysis can be an alternative solution, but it is not yet commonly used in electromagnetics [192,193].…”

“…Isogeometric analysis can be an alternative solution, but it is not yet commonly used in electromagnetics [192,193]. The other disadvantage is that fluid-shaped flux barriers cannot accommodate standardised, "off-the-shelf" ferrite magnets [187,188], making the magnets' manufacturing more complicated and costly. [131] and (c) FI-PMASynRM [194] topologies.…”

Designing of an Enhanced Fuzzy Logic Controller of an Interior Permanent Magnet Synchronous Generator under Variable Wind Speed

“…The TR is abolished to a better level by short-pitching the winding by a few slots to diminish low-order MMF space harmonics, as illustrated in previous research [ 17 ]. By the linkage of the stator along with the rotor’s higher-order redundant harmonics, TR is caused [ 18 ]. The models used to diminish the TR are the machine-design-based approach and the machine-control-based approach.…”