WOODWARD 9907-164 – Digital Governor | Speed Control Module | WOODWARD EG Series
Engineering Background
WOODWARD has been a global leader in energy control solutions for over a century, delivering precision governor and control systems for turbines, engines, and generators across power generation, oil & gas, marine, and industrial sectors. The 9907-164 Digital Governor is engineered for applications demanding tight speed regulation, fast dynamic response, and robust reliability in harsh operating environments.
Product Positioning
The WOODWARD 9907-164 is a microprocessor-based digital governor designed to provide precise speed and load control for diesel and gas engines, steam turbines, and hydro turbines. It is the preferred choice for procurement engineers who require a drop-in replacement or upgrade from analog governor systems, offering superior stability, programmability, and diagnostics in a compact DIN-rail or panel-mount form factor.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 9907-164 |
| Manufacturer | WOODWARD |
| Product Type | Digital Governor / Speed Control Module |
| Control Type | Microprocessor-based PID digital control |
| Input Voltage | 12–24 VDC (nominal), ±20% tolerance |
| Speed Sensor Input | Magnetic pickup (MPU), 0.5–200 Vrms, 100–10,000 Hz |
| Actuator Output | 0–200 mA (proportional current output) |
| Speed Range | Configurable via internal potentiometers / software |
| Droop Setting | 0–10% adjustable |
| Isochronous Operation | Yes (0% droop) |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -55°C to +105°C |
| Humidity | 5–95% RH, non-condensing |
| Protection Rating | IP54 (panel-mounted configuration) |
| Dimensions | Refer to WOODWARD installation drawing |
| Weight | Approx. 200 g |
| Certifications | CE, UL (refer to product datasheet for current listings) |
| Communication | Analog I/O; optional RS-232/RS-485 on select variants |
| Mounting | DIN rail / panel mount |
Proven Application Environments
- Power Generation: Diesel gensets, gas turbine generators, and standby power systems requiring isochronous or droop speed control.
- Oil & Gas: Wellhead compressors, gas lift systems, and pipeline pump drives where precise speed regulation is critical to process safety.
- Marine Propulsion: Main engine and auxiliary engine governor replacement on commercial vessels and offshore platforms.
- Industrial Drives: Hydro turbines, steam turbines, and industrial engine-driven equipment in manufacturing and utilities.
- Retrofit & Upgrade: Direct replacement for legacy analog governors (WOODWARD EG, UG, and compatible third-party units) with minimal rewiring.
Engineering Advantages
- Microprocessor PID Control: Eliminates mechanical wear and drift inherent in analog governors; delivers consistent, repeatable performance over the full service life.
- Wide Input Tolerance: Accepts 12–24 VDC supply with ±20% tolerance, ensuring compatibility with diverse genset and engine electrical systems.
- Configurable Droop & Gain: On-board potentiometers allow field adjustment of gain, stability, droop, and speed reference without specialized tools.
- Fast Dynamic Response: Optimized PID algorithm minimizes speed deviation during load transients, protecting connected equipment.
- Diagnostic Indicators: LED status indicators for power, actuator output, and fault conditions simplify commissioning and troubleshooting.
- Compact Form Factor: Lightweight and space-efficient design suits both OEM integration and field retrofit installations.
System Architecture & Signal Flow
The 9907-164 operates on a closed-loop speed control architecture:
- Speed Sensing: Magnetic pickup (MPU) mounted on engine flywheel or gear tooth generates a frequency signal proportional to engine speed.
- Signal Conditioning: Internal circuitry converts MPU frequency to a DC speed reference signal.
- PID Processing: Microprocessor compares actual speed to the setpoint and computes a corrective output via PID algorithm.
- Actuator Drive: Proportional current output (0–200 mA) drives the fuel control actuator (e.g., WOODWARD EG actuator) to adjust fuel delivery.
- Feedback Loop: Continuous closed-loop correction maintains speed within the configured droop or isochronous band.
Sourcing & Quality Verification
- Source: Konmask.com sources WOODWARD 9907-164 units from authorized distributors and verified surplus channels with full traceability documentation.
- Inspection: Each unit undergoes visual inspection, label verification, and functional pre-check prior to dispatch.
- Authenticity: OEM part numbers, date codes, and country-of-origin markings are verified against WOODWARD reference data.
- Warranty: 12-month warranty against manufacturing defects; replacement or refund per Konmask.com terms.
- Documentation: Original WOODWARD datasheet, installation manual, and test report available upon request.
Procurement Process
- Enquiry: Submit your RFQ via support@konmask.com or call +0086 19859288691 with your required quantity and delivery timeline.
- Quotation: Receive a formal quotation with unit price, lead time, and shipping options within 1 business day.
- Order Confirmation: Place order via Konmask.com checkout or purchase order (PO) for B2B accounts.
- Inspection & Dispatch: Unit inspected, packed, and dispatched with tracking within 1–3 business days.
- After-Sales Support: Technical support available for installation, commissioning, and parameter configuration queries.
Technical FAQ
Q: Is the WOODWARD 9907-164 a direct replacement for the 9907-163 or 9907-165?
A: The 9907-164 is a specific variant within the WOODWARD 99xx governor series. Compatibility with adjacent part numbers depends on actuator type and application wiring. Contact our technical team to confirm interchangeability for your specific engine.
Q: Can the 9907-164 be used with non-WOODWARD actuators?
A: Yes, provided the actuator accepts a 0–200 mA proportional current input. Verify actuator coil resistance and current rating before installation.
Q: What is the minimum MPU signal voltage required?
A: The governor accepts MPU signals from 0.5 Vrms minimum. Ensure the MPU air gap is correctly set per the engine manufacturer’s specification to guarantee adequate signal amplitude at cranking speed.
Q: Is factory calibration required after installation?
A: The 9907-164 ships with factory default settings. Field adjustment of gain, stability, droop, and speed reference is performed via on-board potentiometers during commissioning. No specialized software is required for basic setup.
Q: What is the lead time for in-stock units?
A: In-stock units are dispatched within 1–3 business days. For bulk orders or units requiring sourcing, lead time is confirmed at quotation stage.
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