Optimal Stator Design of Doubly Salient Permanent Magnet Generator for Enhancing the Electromagnetic Performance

Abstract

An optimal stator design technique of a three-phase doubly salient permanent magnet generator (DSPMG) for improving the output power is proposed. The stator configuration was optimally designed by adjusting the stator pole depth and stator pole arc. The trapezoid outer stator tip was also designed. Then, the output characteristics of the designed DSPMG including the flux linkage, electromotive force (EMF), harmonic, cogging torque, efficiency, magnetic flux distribution and voltage regulation were characterized by using the finite element method. Results were compared to the original structure in the literature. It was found that the flux linkage, EMF, cogging torque, and efficiency of the proposed DSPMG were significantly improved after the stator pole depth and stator pole arc were suitably modified. Further details of optimal stator pole depth and stator pole arc are presented. The EMF produced by the optimal proposed structure was 47% higher than that of the conventional structure, while 56% cogging torque improvement and 20% increased efficiency were achieved. The EMF generated by the proposed structure was classified in the high-range scale compared to the other existing models. The symmetrical magnetic flux distribution of all structures was indicated. The voltage regulation of the modified structure was also significantly improved from the conventional model. The proposed design technique can be utilized to maximize the electromagnetic performance of this particular generator type.

An Improvement of Output Power in Doubly Salient Permanent Magnet Generator Using Pole Configuration Adjustment

“…The conventional structure of the DSPMG focused in this work has been developed in our previous publication, as shown in Figure 1b [26]. This structure includes 12 stator poles and 8 rotor poles, written as 12/8 (stator/rotor) poles.…”

“…Figure 1a-d shows the proposed DSPMG structures with 6/4, 18/12 and 24/16 poles where the 12/8 poles structure is considered as a conventional structure. Since the suitable configuration of the conventional 12/8 poles structure was already made in the previous publication [26], there will be no further modification of this structure. The stator and rotor poles of all structures were a salient pole.…”

Influence of High-Frequency Operation on the Efficiency of a PMSM Drive with SiC-MOSFET Inverter

“…Furthermore, the compact design and lightweight construction of high-speed PMSMs contribute to the overall efficiency and range of electric vehicles by minimizing energy losses and maximizing power delivery [11][12][13]. Advancements in motor control algorithms and power electronics have further optimized the performance of high-speed PMSMs, facilitating their seamless integration into next-generation electric propulsion systems [14,15].…”

Electromagnetic Torque Improvement of Doubly Salient Permanent Magnet Machine Using Pole Ratio Adjustment Technique

“…Next, the square envelope and asymmetrical-pole techniques were introduced for achieving larger slot area and lower torque ripple of DSPM (Zhang et al, 2019;Xu et al, 2020). Recently, several structural design techniques have been performed to improve the performance of DSPM, i.e., stator pole configuration design (Sriwannarat et al, 2018;Lounthavong et al, 2019;Lounthavong et al, 2020), partitioned-stator with asymmetrical pole (Sriwannarat et al, 2020a), optimizing the number of poles Sriwannarat et al (2019) and pole configuration adjustment technique (Sriwannarat et al, 2020b).…”