Satellites and subsystems > Power solutions > Solar Array Drive Assembly (SADA) > C14-750 W Solar Array Drive Assembly
Key highlights
The Sierra Space C14–750 W Solar Array Drive Assembly is an incremental Solar Array Drive Assembly (SADA) developed specifically for spacecraft solar array deployment and pointing applications.
The actuator uses a two-phase permanent magnet stepper motor to drive a zero-backlash harmonic drive. An optional three-phase motor is also available. Each ring is contacted by four brushes and has 2A capacity after derating for vacuum operation.
Magnetic modeling and optimization ensure the permanent magnet stepper motor takes full advantage of the available volume for maximum performance per unit weight.
Redundant versions are fully isolated with Nomex-Kapton insulators to prevent failure propagation.
The C14-750 W SADA is derived from an actuator that has many years of flight heritage and a slip ring assembly that has been used on multiple spacecraft.
Key features
- Design, volume-, and mass-efficient configuration
- all-titanium construction
- Two-phase motor windings
- 440C stainless steel harmonic drive / ABEC 7 ball bearings
- Three-phase or four-phase winding configurations available
- High stiffness and load capacity in a small package
- Potentiometer for position telemetry
- Electrical redundancy available
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Last updated: 2025-02-25
C14-750 W Solar Array Drive Assembly
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