Woodward 9907-029 2301A/SPM-A Series Load Sharing Control

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.

Hardware Specifications

Industrial Drives, Governors, and Speed Control Properties

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.

Frequently Asked Questions

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.

Field Installation Guidelines

• Magnetic Pickup Wiring Constraints: Route the MPU speed signal lines via a dedicated twisted-pair cable with 100% shield coverage. Terminate the shield exclusively at the governor chassis ground terminal to prevent structural ground loops, and isolate this run from the 220 VAC power feed and the actuator current lines.
• Potential Transformer Connection Precautions: Connect the potential transformer (PT) input lines securely to ensure phase correlation during synchronization loops. Use standard industrial panel torque specifications on all terminal block points to eliminate contact resistance variations.
• Chassis Orientation and Convective Cooling: Install the rack-mount assembly in a vertical orientation to facilitate passive heat dissipation across the internal component profiles. Ensure that adjacent machinery or panel equipment does not project high-temperature thermal loads directly into the governor casing.