Description
Woodward 8290-195
Technical Specifications
- System Voltage: 12 VDC nominal operating voltage.
- Speed Range: Input frequency range from 3000 to 6000 Hz.
- Actuator Rotation: Supports 30° to 35° rotation, configurable for clockwise or counterclockwise operation.
- Power Requirement: Requires a minimum 5 A battery charger.
- Dimensions: 144 mm x 72 mm x 122 mm.
- Weight: 2.16 lbs (approximately 980g).
Functional Features
- Isochronous Speed Control: Maintains a constant engine speed regardless of varying load conditions.
- Electric-Only Design: Eliminates the need for hydraulic fluid, reducing maintenance and environmental hazards.
- Low-Friction Linkage Support: Optimized specifically for engines with minimal resistance in the fuel control linkage.
- Load Sharing Capability: Compatible with accessories to facilitate parallel generator operations.
Application Scenarios
Extensively utilized in mobile power generation equipment, industrial generator sets, and compact mechanical drive applications where a clean, hydraulic-free speed control solution is required.
Performance Parameters
- Speed Regulation: Provides tight isochronous speed droop characteristics for stable frequency control.
- Dynamic Response: Rapid actuator response to sudden load changes to prevent significant frequency deviations.
Material Composition
Housed in a ruggedized industrial enclosure designed to withstand high vibration and harsh mechanical environments typical of prime mover installations.
Structural Characteristics
- Compact Form Factor: Designed to fit easily into tight installation spaces.
- Mounting Options: Versatile mounting configurations including panel mount or DIN rail installation.
Working Principle
The EPG receives a speed feedback signal from a magnetic pickup unit (MPU) and compares it to an internal setpoint. The internal microprocessor calculates the error and outputs a PWM (Pulse Width Modulation) signal to drive a compatible electric actuator (such as Woodward 512 or 712 series), which physically adjusts the engine’s fuel rack to maintain the target speed.
Installation Requirements
- Battery Charger: A battery charger rated for a minimum of 5 A must be connected to maintain system voltage during high actuator demand.
- Actuator Compatibility: Must be paired with supported electric actuators like the Woodward 512 or 712.
Usage Precautions
- Linkage Friction: Ensure the engine’s fuel control linkage is free of binding and has low friction, as the electric actuator has limited torque compared to hydraulic alternatives.
- Wiring: Use appropriately gauged wire for the 12 VDC power supply to prevent voltage drop during actuator stroke.
