Satellites and subsystems > Attitude > Attitude actuators > Reaction wheels > Reaction Wheel // WHL-100
Key highlights
The Space Inventor WHL-100 is a reaction wheel, previously known as REWL-100, suitable for attitude control of 6U-16U cubesats with a minimum mission lifetime of upto 5 years. The reaction wheel consists of an integrated 3-phase outrunner BLDCs and is made of the material Al-7075-T6. There are 6 coils in the stator and 8 Neodymium magnet poles in the rotor. Ferritic stainless steel is used for the rotors. The two hybrid precision bearings on the sides of rotor are made of ceramic for longevity and lowering friction in space. The speed and acceleration of the reaction wheel is controlled by the internal microcontroller based on comments of ADCS computer.
Key features
Performance
Max nominal RPM: 120.000
Momentum of: 100 mNms @ 10.000 RPM
Max Torque: 20 mNm
Control: Momentum / Speed, Torque or Motor voltage / Duty Cycle
Automatic motor flux reduction (FOC)
Physical
Size: 60 x 60 x 49.72 mm
Mass: 360 g
Rotor inertia: 93.8 x 10-6 kg m²
Operating temperature range: -40ºC to 60ºC
Stainless steel rotor: Aluminium motor housing
Interface
Redundant: CAN
12-pin Gecko connector from Harwin
Voltage
Operating voltage range: 9-33.6 V unregulated DC
Reliability
Long life brushless motor design
Radiation total dose tested EEE parts
Vibration rated for all launch vehicles
5 years design lifetime
Flight heritage
The system achieved flight heritage.
Manufacturing
Supplier in-house facilities
- Maker Lab (for prototypes, tool-making etc.)
- Production Labs
Testing & qualification
Supplier in-house facilities
- Test Lab
- Cleanrooms for integration, test and checkout of complete satellites and flight hardware in general
- Vacuum Chamber, Climate Chamber and Shaker for environmental tests
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Last updated: 2026-01-07
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