L-Series

The L-Series Linear Servo Actuators are powered by a high-power density Brushless DC (BLDC) motor, which is paired with a planetary gearhead to generate high torques in a compact package. This motor and gearhead assembly transmits power through a spur geartrain to the precision ground and preloaded ballscrew. A duplexed angular contact bearing handles all thrust loads and provides zero axial backlash for increased mechanical reliability and control authority.

The L-Series’ design lends itself well to a dual redundant implementation with redundant motors, control electronics, and a triplicated absolute position sensor for voting. Our redundancy concept provides complete control over the redundant operation to the user with no arbitration, voting, or redundancy decisions made by the actuator. There is no internal communication between the redundant controllers or the triplicated sensor, they are 100% electrically isolated. The user’s host can choose to use the redundant actuator in a cold-standby, or load sharing arrangement. CAN 2.0B and RS-485 serial protocols allow for complete control over the actuator’s position and phase currents, while also providing detailed telemetry regarding the actuator’s health and state. An optically isolated enable input is provided as a hardware disable that removes power from the motor bridge when inactive, bypassing the onboard control electronics completely.