Abstract
A reluctance lead screw (RLS) is proposed in this paper which consists of a rotor and a translator, forming a magnetic device that is able to transfer low-speed linear motion into high-speed rotational motion. Permanent magnets (PMs) are only installed in the rotor, making it more suitable for long-stroke applications. The design aspects are assessed by finite element analysis (FEA) and the performance is evaluated. In addition, the thrust force per magnet volume is presented for evaluating the utilization rate of the PMs. The simulation results show that RLS has an advantage in terms of the PM utilization rate. A new method for realizing spiral magnets has also been developed which can not only reduce the manufacturing difficulties, but also ease the installation work. Finally, based on the simulations and analyses, two RLS prototypes designed for wave energy converters (WECs) are presented to show the potential applications of this novel topology.
Highlights
The ongoing debate about environmental problems and the decrease in fossil fuels have made it necessary for more clean energies to be developed
First comes the mechanical gears—they are commonly used in wave energy converters (WECs) [3,4]
Permanent magnets (PMs) volume, which can be calculated with the simulation parameters; n is the total number of helical maximum force linearly when the air gap radius
Summary
The ongoing debate about environmental problems and the decrease in fossil fuels have made it necessary for more clean energies to be developed. Due to the great changes in wave height, the traditional MLS utilized in WECs is always designed. With the help of the superconductor, the force density can be improved effectively field generated by PMs. A high-temperature superconductor electromagnetic screw is presented in but is still lower than that of the MLS. A novel RLS topology for WEC is proposed which utilizes magnets only in one of density can be improved effectively but is still lower than that of the MLS. A novel RLS topology for WEC is proposed which utilizes magnets only in one of manufacture costs and PM consumptions.
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