Designing the first stage of a series connected multistage coaxial magnetic gearbox for a wind turbine demonstrator

Electromagnetic analysis of a wind turbine magnetic gearbox

“…3, and the design parameters are given in Table 2. Its design is based on the stage 1 design presented in [19]. In this initial design, the rotor air gaps were selected to be 0.5 mm.…”

“…Magnetically geared generators [12–19] have recently been proposed as a way of increasing the wind‐turbine drivetrain reliability without increasing the drivetrain size and, therefore, the installation cost [18]. A magnetic gearbox (MG) enables speed amplification to be achieved without any mechanical contact, they do not require gear lubrication and they have inherent overload protection.…”

“…This results in a fixed speed ratio being created that is given by The use of an MG in a wind turbine has been studied by a number of authors [12–17, 19], and an outer stator [15, 17], inner stator [12], and central stator [16] integrated MG generator typology has been proposed for use in a wind turbine. Most analysis to date has focused on using a wind turbine gear ratio that is <10:1 [12–19]. To achieve gear ratios comparable to their mechanical counterparts used in wind turbines a multi‐stage MG is required.…”

“…This paper follows on from the analysis work presented in [19] and focuses on the practical design analysis of the second stage of a 30 kW multi‐stage series‐connected MG wind turbine demonstrator. The gear ratio used for both stages is shown in Table 1, and an illustration of the two‐stage design is shown in Fig.…”

Symmetrical and Antisymmetrical Sequenced Fibers with Epoxy Resin on Rectangular Reinforced Structures Under Axial Loading

“…Many experimental and numerical results related to the ultimate strength of debonded shells have been published, for example, the studies of Sørensen et al [3,4], Branner and Berring [5], and Benloulo and Sanchez [6]. Modeling of composites failure behavior has become the main objective in studies over the years, as seen in the studies of Gaiotti et al [7], Short et al [8], Li et al [9], and Wright [11]. Delamination is particularly important in sandwich structures under compressive loading because the loss of stiffness leads to failure by buckling [12].…”