Reaction Wheel RW90 for Small Satellites

RW90 Features:

  • Integrated wheel drive electronics with latch-up protection
  • Different operation modes for speed and acceleration using model based controllers
  • High torque and speed stability (low noise)
  • Provides extensive housekeepings (e.g.: speed, voltage, current, temperatures)
  • Internal compensation of friction and time delays
  • Low level emitted vibrations, due to the mechanical design and the high level of alignments and balancing


Parameter RW 90 Remark
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 interface
Supply voltage
Power consumption
≤ 1.8 W
≤ 2.7 W
≤ 3.5 W
 15 W
Stand by (motor off)
@ 3000 rpm
@ 6000 rpm
Maximum (max. torque/max. speed)
Mechanical interface
Moment of inertia
4.35 x10-4 kgm2
Rotating mass
Dimension 100mm x 100mm x 60mm
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)