CubeMars RI85-PH KV85 Potting Frameless Inrunner Torque Motor | 48V, 5Nm, Hall Sensor, for Robotic Arms, Exoskeletons

Overview

The CubeMars RI85-PH KV85 Frameless Inrunner Torque Motor is a high-performance brushless DC motor designed for robotic arms, exoskeletons, quadruped robots, and other industrial automation applications. Featuring potting insulation technology, Hall sensor integration, and advanced electromagnetic design, this motor delivers exceptional torque density, thermal stability, and precision control. With a KV rating of 85 RPM/V, it supports continuous torque up to 2 Nm and peak torque up to 5 Nm while maintaining stable efficiency across a wide load range. Its frameless and compact structure allows seamless integration into collaborative and embedded robotic systems.

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Key Features

• Potting Technology: Enhances cooling and thermal resistance; operates reliably even with winding temperature exceeding 150°C.

• High Torque & Efficiency: Peak torque 5 Nm, torque constant 0.13 Nm/A, max speed at continuous torque 3042 RPM, and efficiency up to >80%.

• Integrated Sensors: Built-in Hall sensors and temperature sensors for precise angle and thermal feedback, enabling closed-loop control.

• Compact & Frameless: Frameless inrunner structure with 30% thinner yoke design reduces weight and volume for high compatibility in limited-space applications.

• Superior Electromagnetic Design: Yields 25% improvement in torque and power density over previous RI series.

• Stable Output: Maintains high efficiency and consistent power delivery across varying torque demands.

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Electrical Specifications

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Mechanical Drawing

• Outer Diameter: Ø85 mm

• Inner Diameter: Ø52 mm

• PCB Width: 21.2 mm

• Total Height: 27.3 mm

• Hall distribution angle: 120°

• Mounting pads and three-phase wire output clearly marked.

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Wiring Instructions

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Environmental & Safety Ratings

• Operating Temperature: -20°C to +85°C

• Winding Temperature Tolerance: >150°C

• Insulation Class: H

• Dielectric Strength: 1000VAC for 1s

• Insulation Resistance: 100 MΩ @ 500VDC

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Performance Graph Insights

• Efficiency: Peaks around 84% at 1–1.5 Nm and remains high across a wide torque range.

• Current: Rises linearly with torque, with peak current at 5 Nm close to 40–44 A.

• Speed: Drops linearly from ~4400 RPM to ~2200 RPM as torque increases.

• Power Output: Peaks at torque above 4 Nm with over 1200 W output power.

Manual Downloads

RI85-PH-3D Drawing.zip

RI85-PH-2D Drawing.pdf

RI85-PH Test Fixture.zip

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Applications

• Robotic Arms

• Exoskeleton Systems

• Quadruped and Bipedal Robots

• Collaborative Industrial Robots

• Precision Embedded Actuation Modules

Details

CubeMars RI85 Torque Motor dimensions, three-phase wire output pad, hall sensor.

CubeMars RI85 Torque Motor: 411g, 48V, 2 N·m continuous torque, 5 N·m peak torque, 3042 RPM max speed, 16A continuous current, 44A peak current. Wiring includes L1, L2, Hall sensors, phases U, V, W.

Operation graph for CubeMars RI85 Torque Motor showing output power, efficiency, current, and speed vs. torque at 48VDC, up to 4 N.m.

CubeMars RI85 Torque Motor: 48V, 637W, 2Nm torque, 16A current, 3042 RPM speed. Features include 5Nm peak torque, 44A peak current, and dimensions of 85x27.3mm.

Frameless inrunner torque motor, RI-PH series. CubeMars RI85 model highlighted for compact design and powerful performance.

Lightweight design, highly compatible. Core yoke 30% thinner, maintains magnetic density for compact installations in devices and robots.

Potting technology boosts cooling. RI80 and RI85-PH perform well below 85°C, maintain efficiency up to 150°C. Torque stays stable across temperatures.

CubeMars RI85 Torque Motor: Superior electromagnetic design enhances performance by 25%.

CubeMars RI85 Torque Motor delivers stable output, long-lasting efficiency, and high performance across various torque ranges with consistent power.

CubeMars RI85 Torque Motor integrates Hall and temperature sensors for precise angle and temperature control, enhancing flexibility.