SpaceTech SADA 44/22 (Solar Array Drive Assembly)
SpaceTech GmbH
Integrated Solar Array Drive Assembly combining drive mechanism and drive electronics for LEO satellite constellations.
Technical specifications
- Driving method
- Current controlled, micro stepping
- Command interface
- UART (57.6kBaud); RS-422 or RS-485 available
- Supply voltage
- 22V … 36V
- Standby current
- <= 25 mA
- Max load current
- < 0.3 A
- Motor type
- 2-phase stepper motor
- Redundancy
- Cold redundant drive electronics
- Connector
- DSUB-37 pins
- Harness
- 44 x AWG 22 wires (twist capsule cable spiral)
- Qualification
- Qualified for LEO
- Production rate
- Series production ready, up to 2 units per day
About
The SpaceTech Solar Array Drive Assembly (SADA) 44/22 enables the power transfer from the Solar Array Wing (SAW) to the satellite and rotation of the SAW towards the sun while the satellite is orbiting Earth. Its twist capsule principle uses a flat cable of AWG22 wires that wraps and unwraps as the rotation occurs, ensuring operation even in the most extreme space environments. SADA 44/22 integrates the Solar Array Drive Mechanism (SADM: cable spiral, stepper motor drivetrain, spur gear, harmonic drive assembly) and the Solar Array Drive Electronics (SADE) into a single compact, cost-efficient housing, with inner or outer mounting on the spacecraft side wall possible. The main application is currently communication satellite constellations in LEO, where SADA 44/22 is qualified and ready for series production of up to 2 units per day.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.
