Design and Comprehensive Analyzes of a Highly Efficient TLA-Type Synchronous Reluctance Machine including the Effects of Conductor per Slot and Wire Size

Abstract

Consuming energy sources and greenhouse gas emission are one of the most prominent problems of the latest century. Most of the energy consumed globally and carbon dioxide emissions originate from electric motors used in the industry. Therefore, researchers have recently focused on the production of highly efficient, eco-friendly, and low-priced machines: Synchronous Reluctance Machines. In this study, the design and comprehensive Finite Element Analysis of a TLA-SynRM including the effects of the number of conductors per slot and wire diameter directly affecting stator slot fill factor and crucial for obtaining more realistic results from experiments has been initially carried out. Moreover, power factor, saliency ratio, and efficiency of the novel SynRM are enhanced by utilizing a fine-tuning process based on d- and q-axes flux paths. Additionally, the layer structure of the initial design is changed to a double-layer structure to improve the performance of the machine in the fine-tuning process. In the final step of this study, the machine has been manufactured, and experiments have been accomplished. This study has concluded that the novel SynRM have low torque ripple, high power factor, saliency ratio, and efficiency, whose value is within the range of IE5 efficiency class.

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

“…Electric vehicles based on purely synchronous reluctance traction motors have yet to be commercially available [117]. Although it has been known for years that SynRMs can reach IE4 level efficiency [118,119], it has also been newly revealed that it can reach ultrapremium efficiency (IE5) [120]. However, the power factor of this type of electric motor is low [117,121], which necessitates a higher current-rated inverter.…”

“…Although it has been known for years that SynRMs can reach IE4 level efficiency [118,119], it has also been newly revealed that it can reach ultra-premium efficiency (IE5) [120]. One cause for the unavailability is the low power factor [117,121], which necessitates a higher current-rated inverter.…”