The RO80 KV105 Lite is lighter (265 g against 525 g), narrower (88.6 mm against 108.3 mm) and shallower (17.7 mm against 28 mm). The RO100 KV55 Lite has more continuous torque (4 N·m against 1.3 N·m) and more peak torque (12 N·m against 4.5 N·m).
The RO80 KV105 Lite is US$117 and the RO100 KV55 Lite is US$176. That is US$90.00 per rated N·m for the RO80 KV105 Lite and US$44.00 per rated N·m for the RO100 KV55 Lite.
| RO80 KV105 Lite | RO100 KV55 Lite | |
|---|---|---|
| Rated Torque (N·m) | 1.3 | 4 |
| OD (mm) | 88.6 | 108.3 |
| Weight (g) | 265 | 525 |
| Peak Torque (N·m) | 4.5 | 12 |
| Rated Voltage (V) | 48 | 48 |
| Rated Speed (RPM) | 4000 | — |
| No-Load Speed (RPM) | 4800 | — |
| Rated Current (A) | 15 | — |
| Peak Current (A) | 55 | — |
| Maximum Torque Weight Ratio (N·m/kg) | 15.1 | 22.9 |
| Height (mm) | 17.7 | 28 |
| Kv (RPM/V) | 105 | 55 |
| Kt (N·m/A) | 0.087 | — |
| Ke (V/kRPM) | 9.07 | — |
| Phase to Phase Resistance (mΩ) | 120 | — |
| Phase to Phase Inductance (μH) | 103 | — |
| Inertia (g·cm²) | 1600 | 5290 |
| Mechanical Time Constant (ms) | 2.95 | 1.73 |
| Electrical Time Constant (ms) | 0.86 | 0.96 |
| Pole Pairs | 21 | 21 |
| Winding Type | Delta | Star |
| Operation Ambient Temperature | -20℃~50℃ | -20℃~50℃ |
| Hall Sensor | No | No |
| Temperature Sensor | No | No |
| Driving Way | FOC | FOC |
| Application | Cobot Arm, Exoskeleton | Cobot Arm, Exoskeleton |
Rows the two disagree on are marked; the figures are CubeMars'. To put any other two parts side by side, build your own comparison.