Description
The Woodward 8290-047 is a dedicated Speed Control module from the Electrically Powered Governor (EPG) series. Engineered specifically for gasoline and gaseous-fueled prime movers, this unit provides precise control via single-phase droop functionality. By utilizing a 12VDC power source, it is perfectly suited for portable power generation, small industrial equipment, and mobile applications that rely on a standard 12V electrical architecture.
Product Technical Details
- Model Number: 8290-047
- Series: EPG (Single-Phase Droop Control)
- Application: Gasoline and Gaseous-fueled Engines
- Operating Voltage: 12 VDC
- Speed Sensing Range: 3000–6000 Hz
- Weight: ~1.25 kg
- Country of Origin: United States of America
Common Questions & Answers
💡 Why is the 3000–6000 Hz range important? This frequency range corresponds to the signal generated by the magnetic pickup (MPU) installed on the engine’s flywheel. The controller counts the pulses from the MPU to calculate the engine speed. A range of 3000–6000 Hz suggests this unit is designed for engines operating at high operational speeds, ensuring high-resolution feedback and rapid response times for stable governing.
⚙️ What is the function of “Single-Phase Droop” control? Droop control allows the engine speed to drop slightly as the electrical load increases. This is essential when operating generators in parallel; it prevents the units from fighting each other for control of the bus. By using droop, the generators share the load proportionally based on their capacity, ensuring a balanced and stable power distribution.
🛡️ Can I use this on a diesel engine? The 8290-047 is factory-tuned and optimized for the unique fuel-air dynamics of spark-ignited (gas/gasoline) engines. Diesel engines require different injection timing and combustion characteristics. Using this controller on a diesel engine may result in poor speed stability and ineffective load sharing because the PID (Proportional-Integral-Derivative) control logic is not aligned with diesel fuel system behavior.
🔧 How do I calibrate the droop settings? Calibration is typically performed via the adjustment potentiometers located on the front panel of the 8290-047. When adding load to the generator, you adjust the droop setting to ensure the engine speed decreases at the intended rate. Always refer to the specific setup manual for your engine class, as the required “percentage of droop” can vary significantly based on your grid-tie or local load requirements.
Recommended Woodward Series & Models
If you are expanding your governor system or require compatible 12V components, these models are frequently utilized with the 8290-047:
- Woodward 8256-086 (12V EPG Actuator with Feedback)
- Woodward 8272-356 (Magnetic Pickup Sensor)
- Woodward 8290-037 (Standard 12V EPG Speed Control)
- Woodward 8256-012 (General Purpose EPG Actuator)
- Woodward 8270-1002 (701A Digital Governor)
- Woodward 8404-1002 (Peak 150 Controller)
- Woodward 8273-001 (EasyGen 1000 Series)
- Woodward 8290-038 (12V/24V Universal EPG Control)
- Woodward 9907-162 (2301A Load Sharing Controller)
- Woodward 8290-186 (Integrated EPG Control System)
