Reaction Wheel RWT250
EXA (Astro-und Feinwerktechnik)
The RWT250 is a reaction wheel designed for small satellites, featuring integrated wheel drive electronics, various operation modes, and extensive housekeeping data.
Key figurescomparable across the catalogue
- Mass
- 3 kg
- Power
- 3 W
- Largest dimension
- 200 mm
- Design life
- 7 years
Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.
As published by the supplier
- 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
- Supply voltage
- 23 to 34 V
- Power consumption
- ≤ 3.0 W Stand by (motor off)
- Power consumption (2)
- ≤ 15.0 W @ 5000 rpm
- Power consumption (max)
- ≤ 200 W Maximum (max. torque/max. speed)
- Mass
- ≤ 3.0 kg
- Moment of inertia
- 7.64e-3 kg m2 Rotating mass
- Dimensions
- Height: ≈100 mm Diameter: 200 mm
- Operation temperature
- -20 °C to +50 °C
- Start-up temperature
- -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)
About
The RWT250 is a reaction wheel specifically developed for small satellites, providing precise attitude control. It incorporates integrated wheel drive electronics with latch-up protection, ensuring robust operation. The device offers different operation modes for speed and acceleration, managed by model-based controllers, which contribute to high torque and speed stability with low noise. It provides extensive housekeeping data, including speed, voltage, current, and temperatures, for monitoring and diagnostics. The RWT250 features internal compensation for friction and time delays, and its mechanical design, high level of alignments, and balancing result in low emitted vibrations. It is designed for a lifetime of over 7 years, potentially up to 10 years depending on the electronics grade, and has a storage time of over 3 years (including 240 hours of ground operation).
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.