Reaction Wheel RW90 for Small Satellites
RW90 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
RW90
Parameter | RW 90 | Remark |
Angular momentum | 0.35 Nms | @7800 rpm |
Nominal rotation speed | 6000 rpm | |
Nomial reaction torque | 0.015 Nm | Max. commandable deliverable output torque over the whole speed range |
Power interface | ||
Supply voltage | ||
Power consumption | ≤ 1.8 W ≤ 2.7 W ≤ 3.5 W 15 W | Stand by (motor off) @ 3000 rpm @ 6000 rpm Maximum (max. torque/max. speed) |
Mechanical interface | ||
Mass | ||
Moment of inertia | 4.35 x10-4 kgm2 | Rotating mass |
Dimension | 100mm x 100mm x 60mm | |
Temperatures | ||
Operation | ||
Start-up | -30 °C to +60 °C | |
Survival temperature | -40 °C to +65 °C | |
Data interface | RS485/RS422 | |
Design lifetime | > 7 years | In LEO |
Storage time | > 3 years | (incl. 240 h of ground operation) |