Founded in 2002, Changzhou Sanxie Motor Co., Ltd. is a high-tech enterprise focused on the R&D, manufacturing, and sales of control motors. Its main products include servo motors, stepper motors, brushless motors, and frameless torque motors, along with related supporting products. These products hold clear market competitive advantages for their small size, high power density, and green energy efficiency. In collaborative and humanoid robotics, the company has developed multiple frameless torque motors through self-developed breakthrough base materials and high slot-fill technology, with some products already in volume production. Its latest outer-rotor frameless torque motors can be widely used in lower-limb exoskeletons, drones, lawn mowers, and joint modules, offering advantages of low cost and rapid delivery.