CubeMars RI100 KV105 Frameless Inrunner Torque Motor for Cobot Arm, Exoskeleton, Robotic Arm

Overview

The CubeMars RI100 KV105 Frameless Inrunner Torque Motor is a high-performance BLDC motor designed for precision applications such as cobot arms, exoskeletons, legged robots, and robotic arms. Operating at 12V–48V, it delivers up to 4.95 Nm peak torque, while maintaining compact dimensions and low cogging torque for smooth and accurate motion control. With a frameless, inrunner structure, it offers outstanding torque density, thermal stability, and flexibility for custom integration in tight or lightweight robotic structures.

---

Key Features

• Wide Voltage Range: Compatible with 24V, 36V, and 48V power supplies.

• High Precision Control: Supports encoder resolutions up to 0.01°, compatible with Renishaw and Sick encoders.

• Low Cogging Torque: Enables smoother rotation and low noise—ideal for dynamic robot joints.

• Curved Permanent Magnet Rotor: Optimized for BEMF sinusoidal drive control, ensuring better responsiveness and efficiency.

• Hand-Wound Stator: 0.5 mm clearance and high fill factor for high torque output and low inertia (215.5 g·cm²).

• High Thermal Tolerance: Supports working environments from -40°C to 85°C (ambient motor structure tested to -20°C to 50°C).

• Lightweight and Compact: Only 500g with a maximum torque-weight ratio of 9.9 Nm/kg.

---

Specifications

General Parameters

Electrical Characteristics

---

Connector Wiring

Wiring Correspondence: Hu-U, Hv-V, Hw-W

---

Additional Highlights

• RI100 Rotor Heightened Version: Rotor height increased by 2mm to improve compatibility with Hall sensors.

• Hand Winding Excellence: Precision-wound copper coils with 0.5 mm clearance for better assembly and high torque density.

• Curved Permanent Magnet Rotor: Ensures improved BEMF characteristics for better sinusoidal control.

• Custom Encoder Options: Supports a variety of high-precision encoders including Renishaw and Sick.

• Optimized Gear Engagement: Designed with low cogging torque and excellent gear dynamics, ensuring low noise, smooth operation, and strong acceleration.

---

Applications

• Collaborative robotic arms (Cobot)

• Wearable robotic exoskeletons

• Legged/quadruped robots

• Precision robotic joints and end-effectors

• Compact automation and inspection systems

Manual Downloads

RI100-2D.pdf

RI100 with hall sensor-2D.pdf

 

RI100 without hall sensor-3D.zip

 

RI100 with hall sensor-3D.zip

RI100 Test Fixture.zip

 

Details

CubeMars RI100 Torque Motor dimensions: Ø104, Ø57, Ø55.6, Ø45, 15mm, Ø58, Ø101.

Torque motor dimensions: Ø104, Ø57, Ø55.6, Ø45±0.03, Ø58, Ø101 max, 200±5, 190±5, 30° angle, 4-R1.5 features.

CubeMars RI100 Torque Motor: 24/36/48V, 1.76Nm torque, 1370/2100/2825rpm, 13.6A current, 38.6A peak, 10.47V/krpm, 366.7μH inductance, 215.5gcm² inertia, 9.9Nm/Kg max torque weight ratio, -20°C to 50°C operation.

CubeMars RI100 KV105@24VDC analysis chart. Displays torque (N.m) vs. output power (W), efficiency, current (A), and speed (RPM). Graph highlights motor performance characteristics under varying loads.

CubeMars RI100 Torque Motor: Lower cogging torque, smooth running, low noise, strong dynamic.

Hand-wound stator with 0.5mm clearance for optimal performance.

RI100 Rotor Heightened Version. Overall height increased by 2mm for improved hall sensor sensing.

CubeMars RI100 Torque Motor: -40°C to 85°C, high precision encoder options.