Design constraints and architectural implications of humanoid robot joints

Humanoid robotics is changing what motor drive electronics must do. In traditional industrial drives, the inverter is usually placed in an outside cabinet, connected to the motor by cables. However, in humanoid robots, actuators must fit into joints that replicate how people move like the shoulder, elbow, wrist, and even fingers. This architectural shift forces power electronics to migrate inside the motor housing, where space, thermal dissipation and dynamic response requirements are significantly more challenging.

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