EP 1716 Thermal Conductive Epoxy Potting Compound – Customized for Stators of Frameless Torque Motors in Humanoid Robots
As humanoid robots enter a phase of rapid development, frameless torque motors—the core drive components—act as the “muscle system” of robot joints. However, numerous engineers repeatedly highlight a critical challenge in practical engineering design: Motor stators generate severe heat within an extremely compact structural space. How to simultaneously resolve heat conduction, electrical insulation and crack resistance issues? The solution lies in one core material: ■ EP 1716 High Thermally Conductive Epoxy Potting Compound Why Potting Is Mandatory for Frameless Torque Motors The structural characteristics of frameless torque motors make potting materials indispensable: ■ High torque density → concentrated heat generation ■ No housing air cooling → poor heat dissipation ■ Compact construction → short heat transfer paths ■ Long-term operation under low speed and high torque Without potting treatment, the following failures will typically occur: ■ Excessive temperature rise of stators ■ Degraded insulation performance ■ Vibration abrasion of windings ■ Failure caused by long-term thermal aging ■ Unstable joint drive performance Therefore, potting material is far more than just a filler; it serves as the core material integrating motor thermal management, structural fixation and electrical insulation. Why Epoxy Is the Optimal Choice Potting for torque motor stators needs to satisfy three key requirements simultaneously: ■ Thermal conductivity ■ Structural bonding strength ■ Resistance to thermal cycling Comparison of three mainstream material systems: ■ Silicone: Soft but weak bonding strength, high coefficient of thermal expansion (CTE) ■ Polyurethane: Good toughness but limited temperature resistance ■ Epoxy: High mechanical strength, outstanding stability and reliable structural locking Conclusion: Only epoxy can deliver long-term stable structural fixation. Core Advantages of EP 1716 ■ High thermal conductivity: Thermal conductivity coefficient of 1.5 W/mK, efficiently transferring heat from windings to the housing and unlocking continuous torque output potential; ■ Low CTE: Linear expansion coefficient of only 25 μm/m·℃ below Tg, paired with excellent crack resistance to withstand repeated thermal cycling; ■ High temperature resistance:…
