Description
The Woodward 8290-050 is a sophisticated isochronous speed controller designed to deliver precise engine RPM management. Operating on a 12-V DC power supply, this model is engineered to process magnetic pickup signals within a frequency range of 1500–3000 Hz, making it highly effective for maintaining steady-state speed across various industrial prime movers. Its isochronous capability ensures that the governed speed remains constant regardless of applied load, which is critical for sensitive power generation requirements.
This Woodward 8290-050 controller is part of a tightly integrated system. For optimal performance and safety, it is specifically designed to function exclusively with the Woodward 8256-017 and 8256-022 actuators. This pairing ensures that the electronic control logic of the governor is perfectly matched to the mechanical response characteristics of the actuator, providing a reliable and responsive control loop.
Technical Specifications
- Product Name: EPG Isochronous Speed Controller
- Model Number: 8290-050
- Operating Voltage: 12 V DC
- Speed Sensing Frequency: 1500–3000 Hz
- Control Mode: Isochronous (Constant Speed)
- Required Actuator Compatibility: Woodward 8256-017 or 8256-022
- Weight: Approximately 0.5 kg
- Dimensions: Standardized EPG control module housing
- Origin: Engineered and manufactured to rigorous Woodward quality standards
Frequently Asked Questions
⚙️ Why is the 8290-050 restricted to specific actuators? The controller’s internal control loop is factory-tuned to the electrical impedance and mechanical travel times of the 8256-017 and 8256-022 actuators. Using a different actuator model can cause the governor to become unstable, leading to engine “hunting,” excessive wear on the fuel linkage, or a complete failure to achieve set speed.
🔌 What does the 1500–3000 Hz frequency range represent? This range corresponds to the signal generated by the magnetic pickup (MPU) installed near the engine’s flywheel gear teeth. The controller translates these pulses into rotational speed; ensuring your MPU signal falls within this window is vital for the controller to accurately interpret engine RPM.
⚠️ What happens if the MPU signal falls outside the 1500–3000 Hz range? If the frequency is too low, the controller may not detect sufficient pulses to stabilize the engine; if it is too high, it may reach an overspeed shutdown or become unresponsive. Always verify the number of teeth on the flywheel and the clearance of the MPU to ensure the signal is clean and within the specified frequency range.
🛠️ How do I ensure correct isochronous operation? Isochronous operation requires that the governor be perfectly tuned to the engine’s inertia. After mounting the actuator and connecting the 8290-050, the gain and stability potentiometers must be adjusted while the engine is under load to ensure that the governor reacts quickly enough to maintain frequency without causing oscillations.
Recommended Woodward Series Models
To further support your EPG control architecture, these components are frequently utilized alongside the 8290-050:
- Woodward 8256-017 EPG Actuator
- Woodward 8256-022 EPG Actuator
- Woodward 8440-013 (501 Series Controller)
- Woodward 8290-028 (24V 501 Controller)
- Woodward 8290-032 (12V 501 Controller)
- Woodward EG-3P Actuator
- Woodward EG-6P Actuator
- Woodward L-Series Electric Actuator
- Woodward 505 Digital Governor
- Woodward 723PLUS Digital Control
