The RI20 KV600 draws less current at its rating (1.47 A against 1.98 A), is lighter (20 g against 40 g) and narrower (25 mm against 38 mm), and turns faster at the output (7452 RPM against 4110 RPM). The RI30 KV260 has more continuous torque (0.076 N·m against 0.024 N·m), more peak torque (0.23 N·m against 0.072 N·m) and a higher torque constant (0.03673 N·m/A against 0.01592 N·m/A), and is shallower (14 mm against 14.5 mm).
The RI20 KV600 is US$48 and the RI30 KV260 is US$58. That is US$2000.00 per rated N·m for the RI20 KV600 and US$763.16 per rated N·m for the RI30 KV260.
| RI20 KV600 | RI30 KV260 | |
|---|---|---|
| OD (mm) | 25 | 38 |
| Weight (g) | 20 | 40 |
| Rated Torque (N·m) | 0.024 | 0.076 |
| Peak Torque (N·m) | 0.072 | 0.23 |
| Rated Voltage (V) | 16 | 24 |
| Rated Speed (RPM) | 7452 | 4110 |
| No-Load Speed (RPM) | 9600 | 6240 |
| Rated Current (A) | 1.47 | 1.98 |
| Motor Constant Km (N·m/√W) | 0.0115 | 0.0247 |
| Peak Current (A) | 4.4 | 7.72 |
| Maximum Torque Weight Ratio (N·m/kg) | 4.85 | 5.75 |
| Height (mm) | 14.5 | 14 |
| Kv (RPM/V) | 600 | 260 |
| Kt (N·m/A) | 0.01592 | 0.03673 |
| Ke (V/kRPM) | 0.0016 | 0.0038 |
| Phase to Phase Resistance (mΩ) | 1.89 | 2.2 |
| Phase to Phase Inductance (μH) | 0.45 | 1.41 |
| Inertia (g·cm²) | 1.38 | 4.23 |
| Mechanical Time Constant (ms) | 1.03 | 0.69 |
| Electrical Time Constant (ms) | 0.24 | 0.64 |
| Pole Pairs | 7 | 7 |
| Winding Type | - Phase - | - Phase - |
| Operation Ambient Temperature | -20℃~50℃ | -20℃~50℃ |
| 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.