RW-1Nms
High-precision reaction wheel for imaging satellites.
The RW-1Nms is a reaction wheel specifically designed for imaging satellites that demand exceptional platform stability and precise control while minimising disturbance torques. Featuring a high reliability and efficient design, the reaction wheel exhibits minimal momentum error during torque control, delivers high torque output for swift slew manoeuvres, and achieves high maximum momentum, all within a compact form factor. Additionally, the RW-1Nms includes a comprehensive set of protection features.
RW-1Nms Core Specifications
RW-1Nms Key Specifications
Angular Momentum
1.0 Nms @28.5 V
Torque
±39 mNm (±74 mNm)*
Control Modes
Current, Speed & Torque
Control Rate (Speed, Torque)
10 Hz
Speed Range
±10 000 RPM
Control Accuracy – Imaging Mode
• Speed Control
Steady-state speed error < 0.5 RPM
• Torque Control
Steady-state momentum error < 5.09×10-5 Nms
Interface
CAN / RS485
Supply Voltage
12–36 V
Power @ 0.1 Nms
~ 1.2 W
Peak Power
108 W
Operating Temperature
-20 °C to +60 °C
Dimensions
102.8 × 100 × 50 mm*
Mass
1.0 kg
Unbalance
• Static
< 2 g.mm² (< 0.5 g.mm²)*
• Coupled
< 50 g.mm² (< 15 g.mm²)*
Vibration
14.14 g RMS (GEVS)
Radiation
> 20 kRad at component level
Reliability
ABEC 7 bearings for long service life
Over temperature and current protection
Latch-up protection
Features
Regenerative braking
Control timing knowledge < 1ms
