Reaction Wheel RW25 for Small Satellites
RW25 Features:
- One of the latest developments
- Specially developed for Nano-satellite applications
- Integrated electronics, allowing independent operation via its digital interface
RW1
| Parameter | Type A | Type B |
| Angular momentum | 5.8 E-4 Nms | 1.0 E-4 Nms |
| Nominal rotation speed | 8000 rpm | |
| Maximum rotation Speed | ≈ 16 380 rpm | |
| Speed Resolution | 0.25 rpm (1LSB) | |
| Nomial Torque (max. commandable) | 23 E-6Nm | 4 E-6Nm |
| Torque Deviation – rms value | <2.2 E-6Nm | 0.8 E-6Nm |
| Power interface | ||
| Supply voltage | 5 V | |
| Power consumption for WDE1 (stand by, motor off, Pwde) | WDE for 1 wheel WDE for 3 wheels WDE for 4 wheels |
< 250 mW < 350 mW < 500 mW |
maintaining nominal rotation speed1,2 | < 275 mW + PWDE | < 200 mW + PWDE |
maximum consumption1,2 | < 375 mW + PWDE | < 300 mW + PWDE |
| Mechanical interface | ||
| Mass (including 40 cm cable) | ≤ 24 g | ≤ 15 g |
| WDE Mass | ≤ 45 g | |
| Moment of inertia | 694.5 E-9 kg m2 | 119.5 E-9 kg m2 |
| Dimension Single Wheel | 21 x 12 x 21 mm3 | 21 x 12 x 21 mm3 |
| Temperature | ||
| Operation | -20 °C to +50 °C | |
| Non-operation | -40 °C to +65 °C | |
| Design lifetime | 1 year in LEO | |
| Storage time | 2 years including 250h of ground operation | |
1 … values determined at ambient temperature (~25 °C), vacuum 2… based on the operation on 1 x RW1 | ||