Humanoid Robot Key Module Usage Tips

Humanoid robot key modules (especially joint modules) are the core components for achieving high-dynamic and high-precision motion.

 

Joint Module Usage Tips
Joint modules are usually integrated with motors, gear reducers, encoders, drivers, connectors, etc. When using them, attention should be focused on the following aspects:

 

Connector Selection and Installation
Prioritize connectors that support multi-channel wiring, vibration resistance, and low contact resistance (≤30 mΩ), such as the Greenconn GB01 series wire-to-board connectors.
Ensure the connector has a stress cushioning structure to handle wire harness fatigue caused by repeated joint bending.
In compact spaces, use a 1.25 mm pitch compact layout to accommodate both power and signal hybrid wiring requirements.

 

Encoder Configuration and Feedback
For rotary joints, a dual-encoder scheme (high-speed end + low-speed end) is recommended to improve position feedback accuracy; linear joints like dexterous hands can use a single encoder.
Prefer absolute encoders to avoid the need for homing on power-up; magnetic or inductive encoders are more suitable for impact resistance and wide temperature environments.
For high-end applications (such as dexterous hands), capacitive encoders (like Netzer) can be used, offering non-contact operation, long lifespan, and high resolution.

 

Gear Reducer Matching
High torque density scenarios (such as hip and knee joints): prioritize harmonic reducers (such as Green Harmonic or Harmanaco), with backlash < 1 arcmin.
Lightweight or cost-sensitive scenarios: consider planetary reducers, which have a 92% domestic production rate and reduce costs by 30–45%.
High overload demands (such as street dance or jumping): use cycloidal joint modules that support 5x instantaneous overload (such as Hichuan solutions).

 

Thermal Management and Overload Protection
Joint modules under peak torque (such as 360 N·m) should have a continuous duration ≤500 ms to avoid winding overheating, insulation aging, or permanent magnet demagnetization.
Use natural heat dissipation + lightweight housing (such as aluminum alloy) design to avoid added weight from forced air or liquid cooling.
Pro series modules (such as the Crab Intelligence R120-Pro) support online variable gear ratios, allowing dynamic optimization of power consumption and load ratio according to load. ...