Description
The Woodward 8290-186 is a specialized Speed Control Module engineered for precise isochronous governing. This model is designed to maintain a rock-solid engine speed regardless of load, making it a preferred choice for applications where frequency stability is critical. It is fully compatible with Woodward’s 512 and 1712 series actuators and is tailored for diesel or natural gas turbine prime movers. A key functional advantage of this model is its integrated start fuel limit, which provides controlled fueling during the engine crank and start sequence to prevent excessive smoke or over-fueling, ensuring a clean and reliable ignition every time.
Product Specifications
- Operating Mode: Isochronous (Zero-Droop)
- Start Fuel Limit: Integrated for controlled engine ignition
- Compatible Actuators: 512 series, 1712 series
- Operating Voltage: 12V DC battery supply
- Speed Sensing Range: 3000 – 6000 Hz
- Weight: Approximately 0.98 kg (2.16 lbs)
- Dimensions: 135 mm x 110 mm x 50 mm
- Origin: Primarily manufactured in the United States
Frequently Asked Questions
💡 What is the purpose of the start fuel limit? The start fuel limit feature prevents the governor from commanding full fuel rack travel during the initial crank phase. By restricting fuel until the engine reaches a specific “firing” speed, it protects the turbine or diesel engine from “flooding” or harsh starts, which reduces wear and prevents potential damage to the exhaust system.
⚙️ Why is the 3000–6000 Hz range mandatory for this model? This frequency range represents the optimal speed-signal “window” for the controller’s logic circuits. Operating within this range allows the processor to make the most accurate fuel corrections. If the engine’s magnetic pickup (MPU) signal falls outside this band, the control loop may lose precision or struggle to maintain the isochronous setpoint.
🛠️ How does the 8290-186 behave differently when paired with 512 vs. 1712 actuators? While both actuators are supported, the controller must be configured to recognize the unique stroke and feedback characteristics of each model. The 512 series and 1712 series have different torque-to-current requirements, and the controller’s internal gain settings must be adjusted to match the specific physical dynamics of the chosen actuator.
🌐 Can this unit be used for grid-connected power generation? Because this is an isochronous controller, it is designed for standalone prime movers. If you are planning to connect the output of your generator to a utility grid or parallel it with other generators, you will need to incorporate a load-sharing interface, as pure isochronous control can cause instability when paralleled with other power sources.
Recommended Alternative Woodward Series Models
To support your EPG system requirements and maintenance of your diesel or gas turbine setups, the following ten models are frequently associated with the 8290 and 8256 series governing ecosystem:
- Woodward 8290-149
- Woodward 8290-134
- Woodward 8290-077
- Woodward 8290-073
- Woodward 8290-069
- Woodward 8256-084
- Woodward 8256-060
- Woodward 8256-017
- Woodward 8273-500
- Woodward 9907-162
