A Parameter Selection Procedure for an Axial Flux Wind Power Generator
- PDF / 939,025 Bytes
- 5 Pages / 612 x 792 pts (letter) Page_size
- 102 Downloads / 189 Views
rameter Selection Procedure for an Axial Flux Wind Power Generator V. N. Antipova, *, A. D. Grozova, and A. V. Ivanovaa a
Institute of Silicate Chemistry, Russian Academy of Sciences, St. Petersburg, 199034 Russia *e-mail: [email protected] Received June 19, 2018; revised December 27, 2018; accepted January 23, 2019
Abstract—Disk electromechanical energy converters are used as generators in wind power plants, microturbines, and electric vehicles. The article discusses a new design of a low-speed disk magnetoelectric threephase axial flux synchronous machine for distributed power generation, which has improved weight–size parameters. In the proposed wind power generator design, the air gap is reduced due to the removal of all coilto-coil connections and a concentrated winding with a large winding coefficient is applied. The two-rotor model that is created for this design (150 W, 83 V, 250 min–1) is described, as well as the features of its magnetic circuit and the location of the concentrated winding. The geometrical dimensions of the axial flux synchronous machine determine the inner stator diameter. A technique for balanced selection of the main machine dimensions and the parameters of its winding according to the rated data and the limitations of electromagnetic loads is presented. Comparison of the parameters and characteristics of the new disk design and the cylindrical design with tangential magnetization is carried out using the example of a 40-pole 5-kW synchronous wind generator. The proposed disk design is superior to the cylindrical one in efficiency and demands a smaller material cost. The limitations are the larger outer diameter of the machine and the required large mass of magnets. Keywords: distributed power generation, wind power generator, permanent magnet, axial flux DOI: 10.3103/S1068371220060024
In wind energy, synchronous machines with permanent-magnet excitation are widely used as electromechanical energy converters. For synchronous wind power generators with a three-phase armature winding and permanent rotor magnets, multipolar designs with tangential, axial, or transverse magnetic flux are preferable. There are several designs for each of the three variants. The main dimensions of a generator with tangential magnetization are the outer rotor diameter and its axial length; for an axial flux generator, the outer and inner rotor diameters are these dimensions. Analysis of the designs of synchronous axial flux machines made it possible to evaluate the potential benefit of a design with toroidal winding and two permanent-magnet rotors (Fig. 1), to identify ways to improve the technical and economic indicators of this option, and to propose a design with a reduced air gap and concentrated stator winding [1], as well as to develop its laboratory model, SGPM-0.15-250 (150 W, 83 V, 250 min–1). The stator magnetic circuit of a low-speed axialflux electric machine with acceptable weight-anddimensional characteristics (Fig. 2) is made in the form of a flat laminated ring with toroidal m-p
Data Loading...
