High-power generator rotor structure for automobile

The utility model relates to the technical field of generators, and discloses a high-power automobile generator rotor structure, which comprises a rotor body, a rotating shaft column body and a coil, and is characterized in that the cross section of the rotor body is formed by pouring a circle and three groups of isosceles trapezoids at the periphery of the circle; three groups of second ventilation cavities corresponding to the upper end and the lower end of the isosceles trapezoid are upwards formed in the bottom of the rotor body in a penetrating manner, and the internal diameters of the second ventilation cavities are gradually reduced from bottom to top; according to the technical scheme of the utility model, the ventilation cavity is designed on the rotor body and is trapezoidal, so that the heat dissipation efficiency is improved, and the structural resistance is reduced. And meanwhile, the hollow ventilation cavity and the heat dissipation mesh enclosure are arranged in the rotor, so that heat is sync