Abstract
This study aims at improving the design of a linear magnetic gear (LMG) and verifying its reliability using a fabricated prototype. LMGs represent electromechanical energy-conversion machines employing permanent magnets (PMs). However, given the linear structure of power-transmission devices, LMGs are difficult to manufacture. The proposed study presents an LMG-design aimed at facilitating ease of its manufacturing. To this end, the PM-ratio performance was first analyzed for selection of an appropriate basic model, which can be subsequently optimized by changing the PM-shape and flux-modulation poles to realize optimum electromagnetic characteristics. Moreover, mechanical characteristics of the optimized model were analyzed to aid fabrication. Results of finite-element analyses and experiments performed in this study on a fabricated prototype demonstrate the reliability of the proposed model.
Highlights
In recent years, several energy-conversion systems have been proposed and implemented in conceptual studies.1–3 Of these, magnetic gears (MGs) have gained large popularity.4–6 Contrary to mechanical gears that exhibit mechanical limitations due to physical contact, MGs transmit power along with an increase in both speed and torque by means of a contactless mechanism employing permanent magnets (PMs)
Despite the high power density and efficiency of linear magnetic gear (LMG), their utilization has been confined to concept-based researches owing to manufacturing complications
This study aims at eliminating these manufacturing limitations and enhance LMG performance through use of a simple linearmotor-structure design
Summary
Several energy-conversion systems have been proposed and implemented in conceptual studies. Of these, magnetic gears (MGs) have gained large popularity. Contrary to mechanical gears that exhibit mechanical limitations due to physical contact, MGs transmit power along with an increase in both speed and torque by means of a contactless mechanism employing permanent magnets (PMs). Magnetic gears (MGs) have gained large popularity.. Contrary to mechanical gears that exhibit mechanical limitations due to physical contact, MGs transmit power along with an increase in both speed and torque by means of a contactless mechanism employing permanent magnets (PMs). High-efficiency PMs are extremely useful owing to their characteristic of reducing the overall system volume and weight. MGs can be used in both linear and rotating systems. Several designs of linear magnetic gears (LMGs) characterized by a tubular structure have been proposed.. Despite the high power density and efficiency of LMGs, their utilization has been confined to concept-based researches owing to manufacturing complications. This study aims at eliminating these manufacturing limitations and enhance LMG performance through use of a simple linearmotor-structure design. The proposed design strategy has been validated in the light of experimental results
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