Overview
The CubeMars RI115-PH KV40 Frameless Inrunner Torque Motor is a high-performance 48V brushless DC motor engineered for demanding robotics and automation applications. Featuring a frameless inner-rotor design, this motor delivers a continuous torque of 5.5Nm, peak torque of 16Nm, and maximum speed of 1430 RPM. Its high torque-to-weight ratio of 15 N·m/kg, compact 38.1mm thickness, and integrated Hall & temperature sensors make it an optimal solution for exoskeletons, quadruped robots, robotic arms, and collaborative robots.
Key Features
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Frameless Inrunner Design: Enables seamless integration into compact mechanical systems.
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High Torque Density: Optimized electromagnetic design increases torque and power density by 25%.
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Thermal Resilience: Efficient cooling structure maintains stable performance up to 150°C winding temperature.
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Lightweight Core Yoke: Over 30% thinner than previous RI models, perfect for embedded applications.
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Integrated Sensors: Hall and temperature sensors ensure precise control over position and thermal states.
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Stable Efficiency: Maintains over 80% efficiency across a wide torque range.
Applications
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Exoskeletons
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Robotic Arms
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Quadruped Robots
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Collaborative Industrial Robots
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Embedded Automation Systems
Technical Specifications
Characteristics Overview
| Parameter | Value |
|---|---|
| Hall Distribution Angle | 120 electrical degrees |
| Dielectric Strength | 1000VAC/1S |
| Insulation Resistance | 100MΩ, 500VDC |
| Operating Environment | -20℃ to +85℃ |
| Insulation Class | Class H |
Electric Parameters
| Parameter | Value |
|---|---|
| Voltage (V) | 48 |
| KV Rating | 40 |
| Continuous Torque (N·m) | 5.5 |
| Peak Torque (N·m) | 16 |
| Max Speed at Continuous Torque | 1430 RPM |
| Continuous Current (A) | 20 |
| Peak Current (A) | 52 (Ref) |
| Torque Constant (N·m/A) | 0.29 |
| Speed Constant (RPM/V) | 40 |
| Back EMF Constant (V/RPM) | 0.025 |
| Motor Constant (N·m/√W) | 0.66 |
| Inertia (g·cm²) | 3461 |
| Number of Pole Pairs | 20 |
| Phase Resistance (mΩ) | 134 |
| Phase Inductance (μH) | 245 |
| Electrical Time Constant (ms) | 0.0018 |
| Electromechanical Time Constant | 0.0008 |
| Torque-to-Weight Ratio (N·m/kg) | 15 |
| Motor Weight | 1108 g |
Mechanical Drawing
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Outer Diameter: Ø115mm
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Inner Diameter: Ø74mm
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Total Thickness: 38.1mm
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Rotor Inner Diameter: Ø85mm
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PCB Thickness: 6.1mm
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Mounting Hole Pitch: 60°
Performance Highlights
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Temperature-Resistant Efficiency: Maintains rated torque even above 150°C, outperforming traditional RI100 motors.
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Efficiency vs Torque: Keeps above 80% efficiency from 1Nm to 8Nm torque range.
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Motor Behavior Graph: Output power, RPM, current, and efficiency vs torque clearly plotted for RI115-PH KV40 @ 48VDC.
Wiring Instructions
| Signal | Wire Gauge | Color | Function |
|---|---|---|---|
| L1 | 30AWG | White | Thermistor |
| L2 | 30AWG | White | Thermistor |
| Ha | 30AWG | Yellow | Hall A |
| Hb | 30AWG | Green | Hall B |
| Hc | 30AWG | Blue | Hall C |
| GND | 30AWG | Black | Hall Power Negative |
| VCC | 30AWG | Red | Hall Power Positive |
| U | 14AWG | Black | U Phase |
| V | 14AWG | Yellow | V Phase |
| W | 14AWG | Red | W Phase |
Details

CubeMars RI115 Torque Motor dimensions, three-phase wire output pad, PCB section.

CubeMars RI115 Torque Motor: 48V, 1108g, 5.5 N·m continuous torque, 16 N·m peak torque, 1430 RPM max speed, 20 pole pairs, 20A continuous current, 52A peak current. Wiring includes L1, L2, Ha, Hb, Hc, GND, VCC, U, V, W phases.

Analytical Graph of Motor Operation for CubeMars RI115 Torque Motor, model RI115-PH KV40@48VDC. Displays output power (W), efficiency, current (A), and speed (RPM) against torque (N.m). Output power increases steadily with torque. Efficiency peaks around mid-torque levels before declining. Current rises linearly with torque. Speed decreases as torque increases. Data is informational, subject to change. Graph illustrates motor performance characteristics under varying torque conditions, aiding in understanding operational dynamics and optimal usage scenarios.

CubeMars RI115 Torque Motor: 48V, 823W, 5.5Nm torque, 20A current, 1430RPM speed, 16Nm peak torque, 52A peak current, 1920RPM no-load speed, 1108g weight, 115x38.1mm size.

Compact Design, Powerful Performance. RI-PH Series Frameless Inrunner Torque Motor. Two metallic rings with ridges displayed against a dark background.

Lightweight design, highly compatible. Core yoke 30% thinner, fits compact installations in devices and robots.

Potting tech boosts cooling, works well below 115°C and maintains performance at over 150°C winding temps. RI100 and RI115-PH models feature torque vs. temp graph.

CubeMars RI115 Torque Motor boasts superior electromagnetic design, enhancing torque and power density by 25%.

CubeMars RI115 Torque Motor delivers stable, efficient power across multiple torque ranges, maintaining high efficiency up to 12.0 torque units.

CubeMars RI115 Torque Motor integrates Hall and temperature sensors for precise angle and temperature control, enhancing flexibility.
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