Reaction Wheel RW35
EXA (Astro-und Feinwerktechnik)
The RW35 is a reaction wheel designed for small satellites, featuring integrated drive electronics, high torque and speed stability, and extensive housekeeping capabilities.
Key figurescomparable across the catalogue
- Mass
- 0.5 kg
- Power
- 9 W
- Largest dimension
- 102 mm
- Design life
- 5 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
- 0.1 Nms
- Nominal rotation speed
- 5000 rpm
- Nomial torque (max. commandable)
- 0.005 Nm
- Moment of inertia (rotating mass)
- 1.9 x 10-4 kgm2
- Supply voltage
- 18 V - 34 V
- Stand by (motor off)
- ≤ 2.0 W
- Conservation of rotation speed1
- ≤ 4 W @ nominal rotation speed
- Max. acceleration1
- ≤ 9 W
- Mass
- < 0.5 kg
- Dimension single wheel with flange
- 102 x 102 x 58 mm³
- Operation
- -20 °C to +50 °C
- Non-operation
- -30 °C to +60 °C
- Storage
- -40°C to +65°C
- Radiation (total dose)
- 20 krad (behind 2 mm Al-Shield) in LEO
- Data interface
- RS-422 (RS-485 optional)
- Design lifetime
- 5 years
- Storage time
- 3 years (includes up to 240 hours of ground operations)
About
The RW35 Reaction Wheel is specifically engineered for small satellite applications, providing precise attitude control. It incorporates integrated wheel drive electronics with latch-up protection, ensuring robust operation. The system offers different operation modes for speed and acceleration, managed by model-based controllers, which contribute to its high torque and speed stability and low noise output. The RW35 provides extensive housekeeping data and includes internal compensation for friction and time delays. Its mechanical design, coupled with high levels of alignment and balancing, results in low emitted vibrations. The unit is designed to operate within a wide temperature range and is radiation-tolerant for Low Earth Orbit (LEO) missions.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.