Reaction Wheel RW1
EXA (Astro-und Feinwerktechnik)
The RW1 is a reaction wheel designed for small satellites, featuring separate wheel drive electronics and available with two different rotating masses (Type A or Type B) to provide precise attitude control.
Key figurescomparable across the catalogue
- Mass
- 0.024 kg
- Power
- 0.25 W
- Largest dimension
- 21 mm
- Design life
- 1 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
- Parameter
- Type A
- Angular momentum
- 5.8 E-4 Nms
- Nominal rotation speed
- 8000 rpm
- Maximum rotation speed
- ≈ 16 380 rpm
- Speed resolution
- 0.25 rpm (1LSB)
- Nomial torque (max. commandable)
- 23 E-6Nm
- Torque deviation – rms value
- <2.2 E-6Nm
- Supply voltage
- 5 V
- Power consumption for wde1 (stand by, motor off, pwde) wde for 1 wheel
- < 250 mW
- Power consumption for wde1 (stand by, motor off, pwde) wde for 3 wheels
- < 350 mW
- Power consumption for wde1 (stand by, motor off, pwde) wde for 4 wheels
- < 500 mW
- Maintaining nominal rotation speed1,2
- < 275 mW + PWDE
- Maximum consumption1,2
- < 375 mW + PWDE
- Mass (including 40 cm cable)
- ≤ 24 g
- Wde mass
- ≤ 45 g
- Moment of inertia
- 694.5 E-9 kg m2
- Dimension single wheel
- 21 x 12 x 21 mm3
- Temperature operation
- -20 °C to +50 °C
- Temperature non-operation
- -40 °C to +65 °C
- Design lifetime
- 1 year in LEO
- Storage time
- 2 years including 250h of ground operation
- Parameter (typ)
- Type B
- Angular momentum (2)
- 1.0 E-4 Nms
- Nomial torque (max. commandable) (2)
- 4 E-6Nm
- Torque deviation – rms value (2)
- 0.8 E-6Nm
- Maintaining nominal rotation speed1,2 (2)
- < 200 mW + PWDE
- Maximum consumption1,2 (2)
- < 300 mW + PWDE
- Mass (including 40 cm cable) (2)
- ≤ 15 g
- Moment of inertia (2)
- 119.5 E-9 kg m2
- Dimension single wheel (2)
- 21 x 12 x 21 mm3
About
The Reaction Wheel RW1 is a compact and efficient solution for attitude control in small satellites. It is characterized by its separate wheel drive electronics (WDE) which can manage up to four reaction wheels. The system incorporates a PI controller for precise speed and acceleration management. Users can choose between two different rotating masses, Type A or Type B, to meet specific mission requirements. The RW1 offers four standard data interfaces for versatile integration. Its mechanical design, coupled with high levels of alignment and balancing, ensures low levels of emitted vibrations, crucial for sensitive satellite operations. The product is designed for a 1-year lifetime in Low Earth Orbit (LEO) and has a storage time of 2 years, including 250 hours of ground operation.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.