关键词: 无刷双馈发电机, 双定子, 拓扑结构, 机械结构

Abstract: Due to the influence of its rotor structure, a brushless doubly-fed generator has a limited magnetic field modulation ability, resulting in its low efficiency and low power density. In order to improve the performance of the generator, this paper proposes a new type of dual-stator brushless doubly-fed wind generator with cage-barrier rotors. Two different topological structure design ideas and assembly schemes are presented, and two different mechanical structures and assembly modes are described. Then, the precise physical models of “moving shaft + front rotor bracket” and “static shaft + housing rear end cover” in the structure are established, and the stress and deformation under rated loads are simulated and compared by using the finite element method. Two prototypes with different structures at a rated power of 50 kW and a rated speed of 360 r/min are developed, and no-load and load experiments are carried out respectively. The research results show that the design ideas of “static shaft double-end support” and “moving shaft + integration design of front rotor bracket” can be extended to other dual stator motors.