The Woodward 9907-029, also cataloged as the 9907-029 Load Sharing Control, operates as a dedicated hardware component for speed regulation, automatic load sharing, and synchronization within direct-acting proportional actuator systems.
| Parameter | Specification |
|---|---|
| Model | 9907-029 (Revision E) |
| Brand | Woodward |
| Origin | USA |
| Weight | 2.667 kg (5.88 lbs) |
| Dimensions | 387 mm x 181 mm x 64 mm |
| Operating Temp | -40 to +85 deg C |
| Power Consumption | 10 W maximum |
| Input Power | 220 VAC nominal (90-240 VAC range, 50/60 Hz) |
| Control Logic | Forward-acting (output current increases with error) |
| Speed Signal Range | Up to 11450 Hz |
| Steady State Accuracy | +/-0.25% of rated speed |
| Operating Modes | Isochronous, Droop, and Load Sharing |
| Signal Inputs | Magnetic Pickup (MPU), Potential Transformers (PT) |
| Certifications | CE, UL, EU Directive Compliant |
The module functions as a high-precision electronic governor that executes phase matching and real-time frequency synchronization across parallel generator networks. To ensure deterministic load distribution during parallel operation, the internal circuit manages the actuator loop feedback response by processing raw multi-frequency speed inputs from magnetic pickups up to 11450 Hz. The device relies on internal harmonic distortion suppression stages to filter electromagnetic interference picked up from high-voltage potential transformers. Thermal heat sink dissipation profiles inside the rack-mount chassis stabilize the forward-acting output circuit, permitting precise stiction override and maintaining the loop execution metrics across an extended temperature envelope.
Q: How does the forward-acting control logic dictate the module current output?
A: Under forward-acting logic, the module increases the current output to the actuator proportionally as the speed error increases. This directly drives the proportional actuator mechanism open to correct the speed deficit.
Q: What are the input signal constraints for establishing accurate speed tracking?
A: The control circuit requires a clean frequency input from a magnetic pickup (MPU) capable of delivering signals across a range up to 11450 Hz. This input signal allows the governor to maintain a steady-state frequency accuracy within +/-0.25% of the rated prime mover speed.
Q: Does the 9907-029 support operation alongside distinct generator configurations?
A: Yes. The hardware accommodates three separate configuration configurations: Isochronous for single-unit operation, Droop for manual parallel load distribution, and active Load Sharing for automatic electronic load distribution.
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