CubeMars RI80 V2.0 KV75 Motor
CubeMars RI80 V2.0 KV75 Motor
Product Description
The RI80 V2.0 KV75 frameless torque motor is an inner-rotor, frameless motor from CubeMars' RI series. Through advanced electromagnetic optimization, it achieves a high slot fill ratio and exceptional power density. With no housing or end caps, it reduces volume by over 30% compared to conventional framed motors of equivalent power, making it ideal for embedded installation in space-constrained applications such as robotic arm joints and precision rotary platforms.
The rotor can be directly and rigidly coupled to the load, eliminating intermediate transmission elements and achieving power transmission efficiency exceeding 95%. The stator features a modular design allowing customization of mounting dimensions. The rotor height has been increased by 2 mm to facilitate precise alignment with optional Hall sensors for high-fidelity motion control.
Core Specifications
- Motor Dimensions: Φ85 × 27 mm
- Hollow Shaft Diameter: 40.5 mm
- Motor Weight: 411 g
- Peak Torque: 4.1 Nm
- No-load Speed: 2960 rpm @ 48V
Product Highlights
- High Torque Density & Frameless Design: Maximum flexibility for structural integration, empowering users to tailor mounting solutions to their exact mechanical layout
- Ultra-Low Cogging Torque: Optimized electromagnetic structure ensures exceptional smoothness and stability even at very low speeds
- Compact Form Factor: Designed for seamless embedding into robotic joints, rotating axes, and tight-space mechanisms
- High Customizability: Frameless configuration allows users to freely design support flanges, drive interfaces, and encoder mounts
Packaging Contents
- RI80 V2.0 KV75 Frameless Motor × 1
- Certificate of Conformance × 1
| PRODUCT PARAMETERS | |||
| Parameter | Value | Parameter | Value |
| Application | Cobot Arm / Exoskeleton | Insulation Level | C |
| Driving Way | FOC | Insulation High-voltage | 1000V 5mA/2s |
| Operation Ambient Temperature | -20°C~50°C | Insulation Resistance | 1000V 10MΩ |
| Winding Type | Delta | Phase | Three Phase |
| Pole Pairs | 8 | ||
| Rated Voltage (V) | 24/36/48 | KE (V/krpm) | 15.5 |
| No-load Speed (rpm) | 1480/2220/2960 | Phase to Phase Resistance (mΩ) | 330 |
| Rated Torque (Nm) | 1.45 | Phase to Phase Inductance (μH) | 510 |
| Rated Speed (rpm) | 1135/1785/2430 | Inertia (gcm²) | 212.49 |
| Rated Current (ADC) | 9.4 | Km (Nm/√W) | 0.270 |
| Peak Torque (Nm) | 4.1 | Mechanical Time Constant (ms) | 0.29 |
| Peak Current (ADC) | 27.6 | Electrical Time Constant (ms) | 1.55 |
| KV (rpm/V) | 75 | Weight (g) | 411 |
| KT (Nm/A) | 0.155 | Maximum Torque Density (Nm/kg) | 9.3 |
| U | Red + 16 AWG Silicone Wire | Hv | Blue + 30 AWG Silicone Wire |
| V | Yellow + 16 AWG Silicone Wire | Hw | Green + 30 AWG Silicone Wire |
| W | Blue + 16 AWG Silicone Wire | VCC / GND | Red / Black + 30 AWG Silicone Wire |
| Hu | Yellow + 30 AWG Silicone Wire | Correspondence | Hu–U, Hv–V, Hw–W |