Low-inertia rotor core structure for brushless control motor

The utility model discloses a low-inertia rotor iron core structure for a brushless control motor. The low-inertia rotor iron core structure comprises a plurality of rotor punching sheets which are stacked into a whole. The rotor punching sheet is in a regular polygon shape, a center hole is formed in the center of the rotor punching sheet, a plurality of lightening holes corresponding to the number of edges of the rotor punching sheet are evenly formed in the rotor punching sheet around the center hole, the widths of the lightening holes are gradually increased from the position close to the center hole to the direction away from the center hole, and a stress spoke is formed between every two adjacent lightening holes. The width, close to the center hole, of the stress spoke is larger than the width, away from the center hole, of the stress spoke, and a positioning hole is further formed in the edge, away from the center hole, of each lightening hole. By optimizing the structure of the rotor, the weight of t