Reaction Wheel RW250
EXA (Astro-und Feinwerktechnik)
The RW250 is a reaction wheel for small satellites, featuring integrated wheel drive electronics, various operation modes, and extensive housekeeping data.
Key figurescomparable across the catalogue
- Mass
- 2.7 kg
- Power
- 2.5 W
- Largest dimension
- 180 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
- 0.1 Nm Max. commandable deliverable output torque over the whole speed range
- Supply voltage
- 23 to 34 V
- Power consumption
- ≤ 2.5 W Stand by (motor off)
- Power consumption (2)
- ≤ 7.0 W @ 1500 rpm
- Power consumption (3)
- ≤ 13 W @ 5000 rpm
- Power consumption (max)
- 100 W Maximum (max. torque/max. speed)
- Mass
- ≤ 2.7 kg
- Moment of inertia
- 7.65x10-3 kg m2 Rotating mass
- Dimensions
- Height: 81.6 mm Diameter: 180 mm
- Operation
- -20 °C to +50 °C
- Start-up
- -30 °C to +60 °C
- Survival temperature
- -40 °C to +70 °C
- Data interface
- RS485/RS422
- Design lifetime
- > 7 years In LEO
- Storage time
- > 3 years (incl. 240 h of ground operation)
About
The Reaction Wheel RW250 is designed for small satellites, providing precise attitude control. It incorporates integrated wheel drive electronics with latch-up protection, ensuring robust operation. The wheel offers different operation modes for speed and acceleration, utilizing model-based controllers for high torque and speed stability with low noise. It provides extensive housekeeping data, including speed, voltage, current, and temperatures, allowing for comprehensive monitoring. The RW250 also features internal compensation of friction and time delays, contributing to its accuracy. Its mechanical design, high level of alignments, and balancing result in low emitted vibrations. The product is designed for a lifetime of over 7 years in Low Earth Orbit (LEO) and has a storage time of more than 3 years, including 240 hours of ground operation.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.