Reaction Wheel RW90
EXA (Astro-und Feinwerktechnik)
The RW90 is a reaction wheel designed for small satellites, featuring integrated drive electronics, multiple operation modes, and high torque and speed stability.
Key figurescomparable across the catalogue
- Power
- 1.8 W
- Largest dimension
- 100 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
- 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 consumption
- ≤ 1.8 W Stand by (motor off)
- Power consumption (2)
- ≤ 2.7 W @ 3000 rpm
- Power consumption (3)
- ≤ 3.5 W @ 6000 rpm
- Power consumption (max)
- 15 W Maximum (max. torque/max. speed)
- Moment of inertia
- 4.35 x10-4 kgm2 Rotating mass
- Dimensions
- 100 mm x 100 mm x 60 mm
- Operation
- -30 °C to +60 °C
- 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)
About
The Reaction Wheel RW90 is an attitude control component specifically developed for small satellites. 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 allows for precise attitude adjustments. Key features include high torque and speed stability, resulting in low noise operation, and the provision of extensive housekeeping data such as speed, voltage, current, and temperatures. It also includes internal compensation for friction and time delays to enhance performance. The mechanical design, coupled with high levels of alignment and balancing, contributes to low emitted vibrations. The RW90 is designed for a design lifetime of over 7 years in Low Earth Orbit (LEO) and 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.