Design optimization of a novel linear transverse flux switching permanent magnet generator for direct drive wave energy conversion

Ghaheri, Aghil; Afjei, E.; Torkaman, Hossein

doi:10.1016/j.renene.2022.08.058

Cited by 14 publications

(5 citation statements)

References 20 publications

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“…While the shift time is acceptable, the shift force curve fluctuates quite a lot, which transfers to the output shaft and creates a significant jerk while the synchronization process is processing. When the speed difference is 500 r/min, the maximum jerk exceeds 20 m/s 3 , and when the speed difference is 200 r/min, it is 15.3 m/s 3 . Additionally, at the end of state 1 shown in Figure 5, the shift force overshoots by almost 6%, causing the sleeve to make contact with the synchronizer ring.…”

Section: Experiments and Discussionmentioning

confidence: 98%

“…Consequently, this study designs a type of direct drive gearshift system that makes use of two linear actuators. Thanks to its quick dynamic performance, simple structure, and linear movement, the linear actuator finds extensive use as an actuator in industrial applications, including machine tools, robotic drivers, electromagnetic valves, vehicle suspension, and linear compressors [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Precise and coordinated gearshift control for AMT gearshift system equipped with two linear actuators

Lin,

Li,

Tang

et al. 2024

Mechanics & Industry

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A type of automated manual transmission gearshift system that uses two linear actuators to perform gearshift events is presented. The shifting mechanism can be made simpler by using linear actuator to drive the shift fork directly. The mathematical model of the actuator is built and analyzed. Coordinated control of the engagement and disengagement processes is created based on a detailed analysis of the gearshift process in order to shorten the shift time. The force characteristics test reveals the nonlinear output characteristics. The precise displacement control need for coordinated control and stable control requirement for the shifting operation are satisfied by a linear extended state observer based controller. To verify the novel gearshift system and the control method, a test bench and control system are constructed. The results of the simulations indicate that the displacement control's accuracy is enhanced. As the speed difference reaches 500 r/min, the testing results demonstrate a noticeably reduced of shift force fluctuation and jerk generated during the gearshift process, from 20 m/s3 to 3.1 m/s3. With the improved gearshift system and control method, the gearshift coordinated control can also save 25 ms of shift time.

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Section: Experiments and Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Precise and coordinated gearshift control for AMT gearshift system equipped with two linear actuators

Lin,

Li,

Tang

et al. 2024

Mechanics & Industry

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show abstract

“…In [164], the Taguchi method was employed to determine the most effective parameters for a novel linear transverse flux-switching permanent-magnet generator used in direct-drive wave energy conversion. Similarly, in [165], the design of experiments with Taguchi optimization was applied to achieve optimum performance for double-sided flux-switching permanent-magnet generators utilizing ferrite magnets.…”

Section: Robust Optimization Methodsmentioning

confidence: 99%

“…• Industrial Application and Field Testing: Once the performance and reliability of FSMs are validated through experiments, they can be deployed in real-world industrial applications. Field testing involves installing FSMs in their intended operating environments, such as electric vehicles [81], renewable energy systems [124], or industrial machinery [138]. Data is collected during realworld operation to evaluate performance, identify any operational challenges, and gather feedback for further optimization.…”

Section: ) Experimental Validation and Industrial Applicationmentioning

confidence: 99%

Advancements in Flux Switching Machine Optimization: Applications and Future Prospects

Abunike,

Okoro,

Far

et al. 2023

IEEE Access

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Flux switching machines play a crucial role in emerging sectors such as renewable energy, electric vehicles, and the aerospace industry. Recent advancements have underscored their potential for achieving high torque density, effective heat management, and flux-weakening capabilities. This paper provides a comprehensive review of the design optimization of these machines, offering a unique contribution, as no previous attempts have delved into a detailed exploration of various optimization techniques specific to this technology. Special attention is given to state-of-the-art technologies related to multi-objective optimization and the performance analysis of the three variants: permanent magnet, wound-field, and hybrid excited. The review highlights and compares several optimization strategies from recent research, revealing research gaps in integrating advanced control algorithms, thermal, vibroacoustic, and structural models into the optimization design process of these machines. Furthermore, this review identifies essential trends in optimization development, offering valuable insights and future perspectives for these machines across diverse applications.

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“…In these applications, the elimination of the gearbox leads to higher efficiency, reduced mechanical losses, and lower vibration and noise [1]. Moreover, they are more reliable and require less maintenance than geared ones, which is a prominent achievement for offshore systems [2]. However, due to the lower rotor speed, generators are much heavier in DDAs, which results in higher generator and tower structure manufacturing costs [3].…”

Section: Introductionmentioning

confidence: 99%

A modified approach for efficient cogging torque suppression in a flux switching permanent magnet generator used in micro‐scale wind turbines

Darjazini,

Vahedi,

Gharehseyed

et al. 2023

IET Electric Power Appl

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In recent years, Flux Switching Permanent Magnet (FSPM) machines have attracted notable attention in direct drive, low speed, and high torque density applications such as wind turbines. However, their relatively high cogging torque has been identified as a significant challenge for such applications primarily because of its effects on both starting and running performance of the wind turbines. The authors, therefore, aim to present a modified approach that can improve the cogging torque issue and eliminate the weaknesses of the previously introduced designs. To reach this goal, first, an operating point is chosen for the studied machine regarding the available small‐scale turbines in the market. Then, the potential benefits of combining different cogging torque reduction schemes are investigated thorough the proposed method. This is intended to be done on the rotor teeth without imposing any complications or extra costs. The results show that a simultaneous improvement in the cogging torque and the energy conversion capability of the machine could be achieved through this cost‐effective approach. To end with, the sensitivity of the best cases to the expected manufacturing tolerances is investigated. All analyses are performed via two‐dimensional finite‐element (2D‐FE) models, the accuracy of which has been pre‐certified through experimental measurement.

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Design optimization of a novel linear transverse flux switching permanent magnet generator for direct drive wave energy conversion

Cited by 14 publications

References 20 publications

Precise and coordinated gearshift control for AMT gearshift system equipped with two linear actuators

Precise and coordinated gearshift control for AMT gearshift system equipped with two linear actuators

Advancements in Flux Switching Machine Optimization: Applications and Future Prospects

A modified approach for efficient cogging torque suppression in a flux switching permanent magnet generator used in micro‐scale wind turbines

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