This article highlights the Top 7 Global Frameless Torque Motor Manufacturers, including Kollmorgen, Aerotech, Maxon, Allied Motion, TQ-RoboDrive, Tecnotion, and HONPINE. It provides an overview of each company's history, technical strengths, and key application areas. The article also introduces HONPINE's FMC and fourth-generation FMK frameless torque motor series, which are specifically designed for humanoid robots, collaborative robots, and advanced automation systems. With advantages such as high power density, lightweight design, low cogging torque, fast dynamic response, and customization capabilities, HONPINE continues to optimize its frameless motor technology to support next-generation robotic joint and mechatronic module applications.

This article will provide you with a comprehensive analysis of a robot's rotary joint, including its integrated components, the role of each component, and how precise control is achieved.

The internal rotor frameless torque motor is a specialized type of permanent magnet synchronous motor (PMSM) composed of two core components: the rotor and stator. The rotor is internally positioned, while the stator is externally mounted. Its innovative design eliminates traditional motor housings, bearings, and shafts, retaining only the rotor and stator assemblies. The rotor typically adopts a ring-shaped structure integrated with permanent magnets, directly mounted on the load shaft. The stator consists of copper windings and laminations, generating electromagnetic forces to drive rotor rotation. This configuration achieves torque output through efficient magnetic field interaction, making it ideal for high-precision applications such as robotic joints and industrial automation. It enables direct load driving, minimizing mechanical transmission losses.