Optimal Shape Design of Direct-Drive Permanent Magnet Generator for 1 kW-Class Wind Turbines

Abstract

Direct-drive permanent magnet generators are becoming an attractive option for highly efficient small-scale wind turbines due to their high-power density and size reduction capabilities. In this study, the optimal shape design of a direct-drive permanent magnet generator for 1 kW-class wind turbines was conducted while considering power generation and weight. Half of the geometry of a single stage in the generator was considered for a electromagnetic analysis under given electrical parameters. In order to construct a response surface model, a sensitivity analysis was conducted on seven design parameters of the proposed generator. The desirability function was used to minimize the weight of the generator while meeting a requirement of the target specification. The results indicated that the optimized design parameters for the generator met the target specification while maintaining the generator’s weight at the same level as the initial design model. From the comparisons with other research, the optimized generator exhibited a higher power generation/weight ratio than the generator with a rated capacity under 3 kW.

Selecting the Best Permanent Magnet Synchronous Machine Design for Use in a Small Wind Turbine

“…One of the design considerations was to use commercially available mass-produced The various electrical machines used in wind turbines in general are also reviewed [29,30]. Of the pre-selected rotor designs, the SM-01 and B-01 were abandoned due to the need for profile magnets, which are custom-manufactured and therefore more expensive.…”

Open direct drive wind turbine virtual simulation experiment system

“…Direct drive permanent magnet wind power generation system adopts brushless and ringless permanent magnet synchronous generator as the main generator, eliminating the gearbox transmission device has the characteristics of simple structure, high efficiency, low maintenance rate and failure rate, and also has the ability to work in harsh environment, so it is suitable for the development direction of large-scale offshore wind power generation, which is in line with the development trend of wind power generation technology. Therefore, the research and teaching of direct drive fan have certain practical significance [1][2][3].The control strategy of direct drive wind turbine is more complicated, the theoretical teaching effect is not so good, and the virtual simulation teaching can help students understand the operation mode of direct drive wind turbine to a certain extent [4].The core contents such as structure composition, operation characteristics [5] and control strategy of the variable pitch control system of wind turbine are studied in depth. Meanwhile, it is difficult for ordinary experimental teaching to achieve teaching effect due to the problems of experimental instruments.…”

Structural Analysis and Lightweight Optimization of a Buoyant Rotor-Type Permanent Magnet Generator for a Direct-Drive Wind Turbine

“…Considerable research has been conducted to achieve lightweight designs for permanent magnet direct-drive generators. Shape optimization for mass minimization using the dimensional parameters of structural or electromagnetic generator components as optimization variables has been extensively discussed in prior research [3][4][5][6][7][8][9]. Zavvos et al [6,7] used an analytical approach to minimize the mass of a permanent magnet direct-drive generator by optimizing both the electromagnetic and structural dimension parameters simultaneously.…”