Product Short Description
Product Name: Woodward 9905-144 ProAct Analog Electric Actuator with Integral Driver
Product Introduction: Self-contained analog electric actuator (ProAct family) combining a brushless motor, gear train and integral servo driver in one housing, used to position fuel racks, throttle valves or fuel stops on engines and turbines under 4–20 mA or 0–10 V command.
Description
Technical Specifications:
- Command input: 4–20 mA or 0–10 VDC (analog ProAct variant)
- Output: rotary or linear shaft motion with mechanical stops
- Driver: integral, no external amplifier needed
- Supply: 24 VDC or 115/230 VAC depending on sub-option
- Position feedback: internal RVDT/pot to driver
- Operating temp: -40 °C to +70 °C (housing dependent)
- Protection: IP-rated industrial enclosure, engine-mounted
- Compliance: CE / UL listed per Woodward ProAct manual
Functional Features: Direct drop-in replacing hydraulic actuators; no separate servo drive; configurable travel and gain via DIP/trim; self-protecting against over-travel; integrates with Woodward 505/MicroNet governors.
Application Scenarios: Gas/diesel engine fuel rack positioning, turbine inlet valve control, compressor fuel metering, governor retrofit of mechanical linkages.
Material & Structure: Cast aluminium or steel housing, brushless DC motor, planetary gear, output shaft or lever, integral PCB driver, shielded conduit entry.
Working Principle: Analog command compared to internal position feedback; error amplified by integral driver to move motor until feedback matches command; mechanical stops clamp fuel limits.
Installation Requirements: Rigid engine-mounted bracket; align output linkage without preload; shield command cable; separate power and signal grounds; calibrate zero/full span with governor in idle mode.
Usage Notes: Do not drive into mechanical stop continuously; avoid water ingress on conduit; verify supply voltage variant (24 VDC vs AC) before wiring; periodic linkage inspection prevents drift.
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