Pourquoi le moteur de brosse creux creux est-il plus léger que les moteurs ordinaires?

The lightweight characteristics of the hollow cup DC brush motor are derived from its unique rotor topology and material ratio. The rotor of the hollow cup DC brush motor adopts a coreless cup winding design, which achieves mass reduction by eliminating the hysteresis loss structure of the traditional laminated core.

The hollowness of the rotor of the hollow cup DC brush motor reduces the moment of inertia of the rotating parts, while allowing the use of low-density aluminum-magnesium alloy end caps instead of cast iron flanges. The winding end length compression technology reduces the proportion of ineffective conductors and reduces the amount of copper compared to traditional structures.

The reconstruction of the heat dissipation path is the key to the lightweight of the hollow cup DC brush motor. The open structure of the cup winding allows the cooling airflow to directly contact the conductor surface, eliminating the mass burden of the core heat dissipation fins. The yoke part uses a high-permeability composite material instead of pure iron, which reduces the mass of the yoke unit while maintaining the integrity of the magnetic circuit. The miniaturized design of the brush system reduces the volume of the copper-containing graphite brush compared to the traditional structure.

The manufacturing process innovation further reduces the redundant mass of the hollow cup DC brush motor structure, and the precision winding technology realizes the gap control of the tiny enameled wire. The shell adopts the topological optimization design. While the stress concentration area is thickened by 0.2mm, the wall thickness of the non-load-bearing area is thinned to 0.5mm, and the overall shell mass is reduced by 42%. These collaborative innovations have reduced the mass of the motor at the same power level compared with traditional products.