Humanoid robots integrate artificial intelligence with precision mechanical technology, and their joint drive systems rely heavily on high-performance motors. The permanent magnet materials in these motors are akin to the “heart” of the system, directly determining the torque output capacity of the robot’s joints, the overall size and weight of the robot, and its energy conversion efficiency. To achieve human-like agile movement and sufficient load-carrying capacity, motors must possess high power density and rapid dynamic response—which places extremely stringent performance demands on permanent magnets.
Servo motors have become the core components of robotic joints, and rare-earth permanent magnets—such as neodymium-iron-boron (NdFeB)—account for approximately 45% of the cost of DC servo motors. This figure clearly demonstrates that magnetic materials play a decisive role in enhancing motor performance.
