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.
Typed specifications19 values
Discloses 5 of 10 fields engineers filter by in this category (category median 5).
- Mass
- 3 000 g as published, mode unspecified · vendor page (catalogue a 3 000 g max
- Envelope (L×W×H)
- 200mm*200mm*100mm datasheet p.1
- Angular momentum storage
- 4 N·m·s @5000rpm · datasheet p.1 4 N·m·s 5000rpm
- Max torque
- 300 mN·m nom. · datasheet p.1 300 mN·m as published, mode unspecified
- Speed range
- 5 000 rpm nom. · datasheet p.1 5 000 rpm max | 5 000 rpm max · maximum rotation speed
- Supply voltage
- 23–34 V as published, mode unspecified · vendor page (catalogue a
- Power consumption
- 3 W as published, mode unspecified · vendor page (catalogue a
- Operating temperature
- -20–50 °C operational · datasheet p.1
- Design lifetime
- 7 years datasheet p.1
- Survival temperature
- -30 °C product page
- Satellite class
- microsat 10-100 kg SmallSat TorqueLine · datasheet p.0
- Continuous (nominal) torque
- 300 mN·m printed 0.3 Nm · datasheet p.1
- Nominal operating speed
- 5 000 rpm datasheet p.1
- Flywheel moment of inertia
- 0.008 kg·m² datasheet p.1
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier16 lines, in the manufacturer's own wording
- 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.