Model 935
ROTARY SERVO ACTUATOR
The Model 935 rotary servo actuators utilize brushless DC motors as the prime mover within our design. The available motor technology include use of neodymium magnets. The Model 935 servo is used for surface positioning, throttle control and other utility functions on several UAV and aerospace programs. These actuators are designed to operate under extreme environmental conditions and have been chosen to support new development programs, as well as program requirements.
Our Model 935 is one of our most versatile actuator designs primarily due to the ease of integration with several interface technologies. This baseline unit is very well suited for a variety of applications and is not limited to UAV and target programs.
For more information about how the model 935 rotary actuator can be tailored to fit your specific application, contact our applications engineers.
Features
- Non-jamming mechanical stops
- 4 stage spur gear train assembly
- Stainless steel output shaft, 1/2 inch SAE spline
- Brushless 2 pole PMDC motor
- High temperature capability
- Analog position or digital telemetry feedback
- Electronic stops limit input command
- NTC thermistor in motor for temp sensing of motor windings
- Outputs for current, velocity and temperature telemetry
- Signal interface is digital RS-485 electrical protocol or RC PWM
- Consult factory for other signal interfaces
- Thermal management option available for high altitude application
Benefits
- Robust structural design
- Mechanical stops
- Low weight to power performance
- Customization available
- Inventory available
| Model 935 Specifications | |
|---|---|
| Operating Range | 22 - 32 VDC |
| Typical Voltage | 28 VDC |
| Standby Current | 150 mA |
| Stall Torque | 600 lbin |
| Continuous Holding Torque | 150 lbin |
| No Load Speed | 180° / sec |
| Unpowered Backdrive Torque | Less than 80 ozin |
| Power Point | 280 lbin @ 60° / sec |
| Mechanical Travel(s) | ±25°, ±40, ±50° or ±95° |
| Mechanical Backlash | Less than 36 arcmin with 10 lbin reversing torque |
| Electrical Travel(s) | ±20°, ±35°, ±45°, ±75° or ±90° |
| Stall Current | 6 amps |
| Frequency Response | Greater than 5 Hz |
| Electromechanical Stiffness | Up to 485 lbin / ° |
| Loss of Communication | For RS-485 version - holds at last position For R/C PWM version - returns to null position |
| Weight | 3.90 lbs |
| Operating Temp | -40°C to +70°C |
| Storage Temp | -54°C to +85°C |
| Altitude / Temp | 0 ft to 65,000 ft MSL / -40°C to 60°C |
| Vibration | 20 - 2000 Hz, 8.12 g’s rms, random |
| Water Immersion | 4 meters for 3 hours |
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Typical Applications
- Unmanned air vehicles - tactical, medium long endurance and MALE / HALE vehicles
- Control surfaces requiring servo actuation - Target drones - surface control, speed brakes
- Utility actuation - throttle control, doors, spoilers
- Helicopter - manned or unmanned
- Swash plate or flap control