CubeMars RI80 V2.0 KV75 Frameless Inrunner Torque Motor 1.45Nm 48V for Cobot Arm & Exoskeleton

Overview

The CubeMars RI80 V2.0 KV75 is a high-performance frameless inrunner BLDC torque motor designed for exoskeletons, cobot arms, quadruped robots, and other industrial robotic applications that demand compact size, high torque density, and precision control. With a wide voltage range (12V–48V) and flexible structural integration, the RI80 V2.0 provides smooth, quiet operation, high dynamic response, and exceptional torque output, making it ideal for advanced robotic joints and collaborative automation.

Key Features

• Frameless Inrunner Design: Compact and easy to integrate into space-constrained systems.

• High Torque Density: 1.45 Nm rated torque with peak up to 4.1 Nm; 9.3 Nm/kg torque-to-weight ratio.

• Ultra-low Cogging Torque: Ensures smooth, precise movement and low noise.

• Curved Permanent Magnets: BEMF sinusoidal design enables better control and performance.

• Hand-wound Stator: High copper fill factor and only 0.5mm clearance improve installation and thermal dissipation.

• Temperature Tolerance: Operates in extreme environments ranging from -40°C to 85°C.

• Encoder Compatible: Supports high-resolution encoders from Renishaw, SICK, etc., for 0.01° control precision.

• RI80 Heightened Rotor Option: 3mm increased rotor height for optimal Hall sensor feedback.

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Specifications

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Wiring Configuration

Correspondence: Hu–U, Hv–V, Hw–W

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Performance Chart (RI80II KV75 @ 24VDC)

• Blue Line: Output Power (W)

• Red Line: Current (A)

• Orange Line: Speed (RPM)

• Green Line: Efficiency

The motor demonstrates excellent efficiency in the mid-torque range (0.5–2.0 Nm), making it optimal for robotic joints with frequent dynamic positioning.

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Applications

• Collaborative Robots (Cobots)

• Exoskeletons

• Bipedal & Quadruped Robots

• Precision Robotic Arms

• Medical Robotics

• Industrial Automation

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Why Choose CubeMars RI80 V2.0?

The CubeMars RI80 V2.0 combines next-generation motor design, robust torque output, and precise motion control to meet the most demanding robotic applications. Its frameless configuration allows seamless mechanical integration while reducing the size and weight of the system. Whether you're designing wearable robotics or agile cobots, the RI80 V2.0 delivers the performance, efficiency, and customizability you need.

Manual Downloads

RI80-2D.pdf

RI80 with hall sensor-2D.pdf

RI80-3D.zip

RI80 with hall sensor-3D.zip

RI80 Test Fixture.zip

 

CubeMars RI80 Torque Motor dimensions: Ø85±0.07, Ø51, Ø50, Ø40.5±0.03, 19, 6.5 (MAX).

 

CubeMars RI80 Torque Motor with hall sensor. Dimensions: 85mm diameter, 82mm length. Features U (Yellow), V (Red), W (Blue) wiring and precise tolerances.

 

CubeMars RI80 Torque Motor: 24/36/48V, 1.45Nm torque, 9.4A current, 1135/1785/2430rpm speed. Insulation class C, 1000V high-voltage, 10MΩ resistance. Delta winding, 8 pole pairs, 411g weight.

 

CubeMars RI80II KV75@24VDC motor analysis chart. Displays torque vs. output power, efficiency, current, and speed. Torque ranges from 0 to 5 N.m, with corresponding values for other parameters.

Details

 

Frameless motor with high torque density. Strong dynamic, delicate work.

Lower cogging torque, smooth running, low noise, strong dynamic performance.

Hand-wound stator with 0.5mm clearance ensures high torque and dynamics.

Curved permanent magnet design for BEMF Sinus motor, ensuring easy control.

RI80 Rotor Heightened Version: Overall height increased by 3mm for better hall sensor sensing.

Encoder options: High resolution, high precision control with 0.01°. Renishaw, Sick, and other high precision encoders available.