High Power Type 5 Solar Array Drive Assembly

The single axis High Power Solar Array Drive Assembly (SADA) is based on the Type 5 Rotary Incremental Actuator. This standard SADA meets up to 9 kilowatts of power transfer. The design is configured with a Harmonic Drive gear set driven by a Moog discrete permanent magnet stepper motor, potentiometer for position sensing and a high-power slip ring assembly for power transfer.


Key Features:

  • Design is based on Moog Type5 rotary output stage
  • Integrated slip ring assembly for power and data transfer is mounted on the rear of the actuator
  • Integrated potentiometer position feedback
  • Low weight
  • Zero backlash
  • Slip ring assembly capable to 6A derated current for power circuits


Parameter Units Basis Data

Output Step Angle

Degrees         Standard        0.0075           
Steps per Revolution Steps Standard 48000
Max. Output Step Rate Steps/sec (Deg/sec)  Maximum 300 (2.25)
Backlash Degrees Maximum zero backlash
Operating Temperature Range °C Maximum -50 to +70
Torsional Stiffness lb-in/Rad Minimum 250,000
Moment Stiffness lb-in/Rad Minimum 500,000
Axial Stiffness lb/in Minimum 200,000
Radial Stiffness lb/in Minimum 800,000
Output Load Capability Axia lbf Nominal 370
Radial Stiffness lbf Nominal 370
Moment Lb-in Nominal 430
Output Torque Lb-in Minimum 400
Mechanical Accuracy Degrees Better than +/- 0.02
Unpowered Holding Torque Lb-in Minimum 300
Powered Holding Torque Lb-in Minimum 600
Slip-Ring Signal Circuits 16 Rings derated at 1 A each 16 Rings derated at 1 A each 16 Rings derated at 1 A each
Actuator Power Consumption Watts Maximum 20
SADA Weight (without Harness) Lb Maximum 11.00

Related Markets


Moog has designed and manufactured components and systems for satellites and launch vehicles for more than 60 years.

Spacecraft Technologies

Moog is a proven leader in components, subsystems, and systems for spacecraft of all sizes, from smallsats to GEO spacecraft. Moog has been successfully providing spacecraft controls, inspace propulsion, and major subsystems for science, military, and commercial operations for more than 60 years.