Reaction Wheel RWT250 for Small Satellites
RWT250 Features:
- Integrated wheel drive electronics with latch-up protection
- Different operation modes for speed and acceleration using model based controllers
- High torque and speed stability (low noise)
- Provides extensive housekeepings (e.g.: speed, voltage, current, temperatures)
- Internal compensation of friction and time delays
- Low level emitted vibrations, due to the mechanical design and the high level of alignments and balancing
RWT250
| Parameter | RWT 250 | Remark |
| Angular momentum | 4.0 Nms | @ nominal speed |
| Nominal rotation speed | 5000 rpm | |
| Nomial reaction torque | 0.3 Nm | Max. commandable deliverable output torque over the whole speed range |
| Power interface | ||
| Supply voltage | 23 to 34 V | |
| Power consumption | ≤ 3.0 W ≤ 15.0 W ≤ 200 W | Stand by (motor off) @ 5000 rpm Maximum (max. torque/max. speed) |
| Mechanical interface | ||
| Mass | ≤ 3.0 kg | |
| Moment of inertia | 7.64e-3 kg m2 | Rotating mass |
| Dimension | Height: ≈100 mm Diameter: 200 mm | |
| Temperatures | ||
| Operation | -20 °C to +50 °C | |
| Start-up | -30 °C to +60 °C | |
| Survival temperature | -30 °C to +70 °C | |
| Data interface | RS485/CAN | |
| Design lifetime | > 7 years | Depending on electronics grade (up to 10 years) |
| Storage time | > 3 years | (incl. 240 h of ground operation) |