SEPTA36 Solar Array Drive Mechanism
Beyond Gravity (ex-RUAG Space)
Fully qualified high-power Solar Array Drive Mechanism from Beyond Gravity's modular SADM family, qualified for LEO and GEO missions.
Typed specifications105 values
Discloses 1 of 12 fields engineers filter by in this category (category median 3).
- Mass
- 4 000 g excl. customer-specific harness (SEPTA36-1) · datasheet p.4 4 600 g excl. customer-specific harness (SEPTA36-2) | 5 400 g excl. customer-specific harness (SEPTA36-3) | 4 000 g SEPTA36-1 | 4 000 g SEPTA36-1, excl. customer-specific harness +4
- Slip-ring tracks
- 30 SEPTA36-1 · datasheet p.3 30 SEPTA36-1; all tracks identical and usable for power or signa… | 60 SEPTA36-2 | 60 SEPTA36-2 (30 lines) | 90 SEPTA36-3 +1
- Envelope (L×W×H)
- Max. Outer Diameter mounting flange 144 mm datasheet p.4 Length from front of flange 162.5 mm SEPTA36-1 | max. outer diameter mounting flange 144 mm; length overall 202 mm SEPTA36-1 (length from front of flange 162.5 mm) | Length from front of flange 212.5 mm SEPTA36-2 | max. outer diameter mounting flange 144 mm; length overall 252.0 mm SEPTA36-2 (length from front of flange 212.5 mm) +11
- Power transfer
- 6 300 W total power transfer, SEPTA36-1 · datasheet p.3 12 600 W total power transfer, SEPTA36-2 | 18 900 W total power transfer, SEPTA36-3
- Output torque
- 55 000 mN·m gt, Delivered Output Torque @ 200 mA · datasheet p.3 55 000 mN·m gt, Delivered Output Torque @ 300 mA | 7 000 mN·m Unpowered holding torque | 55 000 mN·m min · delivered output torque @ 200 mA | 55 000 mN·m min · delivered output torque @ 300 mA +1
- Rotation speed
- 0.167 rpm max · datasheet p.3 0.167 rpm max · max. output speed
- Supply voltage
- 5 V nom. · Operating · datasheet p.3 2.5 V min · Operating | 2.5 V min · Position Measurement Operating Voltage | 120 V max · across tracks | 12 V max · Operating +3
- Operating temperature
- -35 °C min · Cold Operational (S/C conductive interface) · datasheet p.6 -30 °C min · Cold Operational (S/C radiative interface) | -40 °C min · Cold start-up limit (S/C conductive interface) | -30 °C min · Cold start-up limit (S/C radiative interface) | -35 °C min · S/C conductive interface Cold Operational +7
- Design lifetime
- 15 years datasheet p.3 15 years in orbit
- Continuous rotation
- yes continuous rotation in forward and reverse direction · datasheet p.3
- Travel range
- 360 deg continuous rotation in forward and reverse direction · datasheet p.3
- Step size
- 0.006 deg output step size (full step) · datasheet p.3
- Positioning accuracy
- 1 ° position output accuracy (outside of potentiometer dead band) · datasheet p.3
- Holding torque (unpowered)
- 7 000 mN·m unpowered, ~7 Nm (without optional detent break) · datasheet p.3 55 000 mN·m max · powered
- Power and signal transfer
- other slip ring with connectors (brush type not stated) · datasheet p.2
- Current per track
- 4 A maximum per individual track ; as-qualified · datasheet p.3 3.5 A max · 3.5 ARMS simultaneously on all tracks | 4 A max · maximum per individual track; as-qualified
- Life, revolutions
- 19 503 GEO qualification campaign: revs as sweeps · datasheet p.3 152 437 LEO qualification campaign: revs as continuous revs and sweeps | 500 qualified lifetime: full revs on ground
- Survival temperature
- -40 °C min · Cold Non-Operational (Survival) (S/C conductive interface) · datasheet p.6 -30 °C min · Cold Non-Operational (Survival) (S/C radiative interface) | 10 °C min · Ground Storage (S/C conductive interface) | 10 °C min · Ground Storage (S/C radiative interface) | -40 °C min · S/C conductive interface Cold Non-Operational +9
- Random vibration
- 23.74 g RMS random vibrations, parallel to mounting plane (X) · datasheet p.4 23.74 g RMS random vibrations, parallel to mounting plane (Z) | 23.2 g RMS random vibrations, perpendicular to mounting plane (Y)
- Flight heritage
- Qualified for LEO and GEO missions; flight proven slip ring technology; standard actuator with huge flight heritage datasheet p.2
- Satellite class
- GEO datasheet p.2 large >500 kg
- Shock qualification
- 1 600 g shock input level at 1000 Hz and 10000 Hz, each axis · datasheet p.5 1 600 g Shock input levels, 1000 Hz | 1 600 g Shock input levels, 10000 Hz
- Max bending moment
- 400 N·m static bending load (non-simultaneous); axial load 4800 N, ra… · datasheet p.4
- Voltage per track
- 120 V max · datasheet p.3
- Contact resistance
- 140 mΩ max · connector-to-connector resistance at 22 °C, with 250 mm harness · datasheet p.3 28 mΩ max · noise (RMS; per line, i.e. 2 transfers in series)
- Position feedback
- potentiometer position output availability 0° ... 356.5°; max. dead band < … · datasheet p.3
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier22 lines, in the manufacturer's own wording
- Type
- Solar Array Drive Mechanism (high power class)
- Qualification
- Fully qualified; qualified for LEO and GEO missions
- Slip ring
- In-house gold-on-gold slip ring technology
- Modularity
- Interfaces remain the same regardless of power class
- Assembly
- Actuator part, slip ring with connectors, customizable solar array connectors, motor and sensor connectors, mounting interface
- Availability
- Rolling stock for short lead times
- Max. output speed
- 1.0 °/s
- Lifetime
- 15 years in orbit
- Unpowered holding torque
- ~7 Nm
- Powered Holding Torque
- max. 55 Nm
- Delivered Output Torque @ 200 mA
- > 55 Nm
- Delivered Output Torque @ 300 mA
- > 55 Nm
- Motor Back-EMF Constant
- 2.33 Vs/rad
- Position Output Accuracy
- ± 1°
- Position Output availability
- 0° … 356.5°
- Max. Dead Band
- < 3.5°
- Potentiometer End-to-End Resistance
- 10 kΩ ±10%
- Operating Voltage
- 2.5 V .. 12 V
- Coil Resistance @ 20°C
- 76 Ω ± 10%
- Coil Inductance @ 20°C
- 156 mH ± 20%
- Motor time constant
- 2 ms
- Max. Outer Diameter mounting flange
- 144 mm
About
Beyond Gravity offers a modular family of Solar Array Drive Mechanisms, to serve a large range of spacecraft. The SEPTA36 is fully qualified and is available at attractive lead times.
Modularity for lowest cost: a family of SADM for a large range of missions, standard mechanical interfaces, a standard actuator with huge flight heritage, and rolling stock that enables short lead times and flexibility. Interfaces remain the same regardless of power class, which suits scalable platforms.
Robust and proven: flight proven slip ring technology, a standard actuator with components flying for decades, an enormous database of unit data with family trend and comparisons, and qualification for LEO and GEO missions.
Tailored for you: Beyond Gravity’s engineering expertise allows adaptation for unusual and specific applications, and adapted interfaces, test scope and modifications are feasible on request. The unit comprises an actuator part, a slip ring with connectors, customizable solar array connectors, motor and sensor connectors, and a mounting interface.
For mid- to large-sized satellites with high power requirements, such as telecommunication satellites, or for sensitive missions with low disturbance tolerance, the high-power SADMs are equipped with in-house slip rings that use gold-on-gold technology.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.