The RO80 KV105 Lite has more peak torque (4.5 N·m against 4.1 N·m), is lighter (265 g against 411 g) and shallower (17.7 mm against 27 mm), and turns faster at the output (4000 RPM against 1135/1785/2430 RPM). The RI80 V2.0 KV75 without hall sensor has more continuous torque (1.45 N·m against 1.3 N·m) and a higher torque constant (0.155 N·m/A against 0.087 N·m/A), draws less current at its rating (9.4 A against 15 A), and is narrower (85 mm against 88.6 mm).
The RO80 KV105 Lite is US$117 and the RI80 V2.0 KV75 without hall sensor is US$149. That is US$90.00 per rated N·m for the RO80 KV105 Lite and US$102.76 per rated N·m for the RI80 V2.0 KV75 without hall sensor.
| RO80 KV105 Lite | RI80 V2.0 KV75 without hall sensor | |
|---|---|---|
| Rated Torque (N·m) | 1.3 | 1.45 |
| OD (mm) | 88.6 | 85 |
| Weight (g) | 265 | 411 |
| Peak Torque (N·m) | 4.5 | 4.1 |
| Rated Voltage (V) | 48 | 24/36/48 |
| Rated Speed (RPM) | 4000 | 1135/1785/2430 |
| No-Load Speed (RPM) | 4800 | 1480/2220/2960 |
| Rated Current (A) | 15 | 9.4 |
| Peak Current (A) | 55 | 27.6 |
| Maximum Torque Weight Ratio (N·m/kg) | 15.1 | 9.3 |
| Height (mm) | 17.7 | 27 |
| Kv (RPM/V) | 105 | 75 |
| Kt (N·m/A) | 0.087 | 0.155 |
| Ke (V/kRPM) | 9.07 | 15.5 |
| Phase to Phase Resistance (mΩ) | 120 | 330 |
| Phase to Phase Inductance (μH) | 103 | 510 |
| Inertia (g·cm²) | 1600 | 212.49 |
| Mechanical Time Constant (ms) | 2.95 | 0.29 |
| Electrical Time Constant (ms) | 0.86 | 1.55 |
| Pole Pairs | 21 | 8 |
| Winding Type | Delta | Delta Phase 3 |
| Operation Ambient Temperature | -20℃~50℃ | -20℃~50℃ |
| Hall Sensor | No | — |
| Temperature Sensor | No | — |
| Driving Way | FOC | FOC |
| Application | Cobot Arm, Exoskeleton | Cobot Arm, Exoskeleton |
| Motor Constant Km (N·m/√W) | — | 0.2698 |
Rows the two disagree on are marked; the figures are CubeMars'. To put any other two parts side by side, build your own comparison.