FAULHABER BXI: The Most Powerful 34mm Integrated Drive for Humanoid Robotics

Human-Like Precision in a 34mm Package: Redefining Integrated Drive Systems for Humanoid Applications

MARCH 2026 — As the robotics industry moves toward more complex, human-like movements, the demand for "smaller, faster, stronger" has never been more literal. FAULHABER has answered this call with the launch of the BXI, the most powerful integrated drive system in the company’s history.

Specifically developed for modern robotic applications, the 9317 BXI G series is designed to bridge the gap between delicate grip movements and the powerful, coordinated force required for humanoid joint control. By integrating the motor, gearhead, and encoder into a single functional unit, FAULHABER has created a system where every millimeter and every gram is optimized for high power density.

Technical Breakthroughs: Maximum Performance, Minimum Footprint

The BXI isn't just a motor; it is a meticulously engineered system designed to thrive in environments where space is the ultimate constraint.

• Compact Powerhouse: With an installation length of just 34 mm, the system delivers a staggering maximum torque of up to 20 Nm.

• Internal Rotor Excellence: Featuring 21 pole pairs, a grooved stator, and an iron-core winding, the BXI ensures low cogging torque and high torque density for fluid, organic-style movements.

• Integrated Intelligence: The system includes a high-resolution absolute encoder with 15-bit SSI, a line driver, and a compensation algorithm. This ensures interference-resistant positioning, critical for the accuracy of autonomous robotic limbs.

• Thermal and Environmental Durability: Housed in flat, corrosion-resistant aluminum, the design focuses on optimized thermal dissipation—allowing the motor to push performance limits without overheating.

• Seamless Integration: The BXI covers a voltage range up to 50 V and is designed for immediate synergy with the FAULHABER MC5010 Motion Controller.

The "Joint" Evolution: Why Integration Matters

For robotics developers, the BXI solves the traditional headache of "component soup"—where separate motors, gears, and sensors take up too much room and increase failure points.

"The drive system forms a functional unit where maximum performance meets minimum space requirements. By decoupling the complexity of assembly and focusing on systematic integration, we are enabling robot designers to focus on innovation rather than cable management."

When paired with the Motion Manager software, commissioning becomes a streamlined process, allowing for torque-sensitive and highly precise positioning tasks to be deployed in record time.

FAQ.

Why is the "internal rotor" design significant for robotics?

In robotic joints, you need quick reaction times. The internal rotor construction of the BXI allows for high dynamics and fast acceleration. Because the inertia is lower than an external rotor, the robot can react to sensor inputs—like a "touch" or an "obstacle"—much faster, making the machine safer and more agile.

Can the BXI handle the high-interference environments of smart factories?

Yes. The integrated absolute encoder is built with a line driver and a compensation algorithm. This makes the signal highly resistant to the electromagnetic interference (EMI) often found in industrial environments where many wireless signals and power cables coexist.

Is this system only for humanoid robots?

While it is ideal for humanoid joints due to its 34 mm length, its high torque and precision make it perfect for any application where "every gram counts." This includes medical exoskeletons, advanced prosthetics, and high-precision laboratory automation where space inside the machine is limited.