Woodward 9903-445 2301A Load Sharing Speed Control Module

The Woodward 9903-445 is the 2301A series electronic load sharing and speed control unit, designed for prime mover and generator set regulation. It receives speed signals from magnetic pickup sensors and outputs actuator drive signals to maintain stable engine speed and realize balanced load distribution among multiple parallel generators.

This controller supports isochronous and droop control modes with adjustable PID dynamics and ramp parameters. Featuring robust panel-mounted housing and comprehensive internal protection logic, it is widely deployed in diesel, gas engine and turbine power generation systems for routine maintenance and spare part replacement.

Main Specifications

• Brand: Woodward
• Model: 9903-445 (2301A Load Sharing & Speed Controller)
• Power Supply: 18 VDC ~ 40 VDC
• Speed Input: Magnetic Pickup signal, 1–30 VAC RMS
• Actuator Output: 0–200 mA DC for Woodward fuel actuators
• Frequency Range: 500 Hz ~ 7500 Hz adjustable
• Control Modes: Isochronous constant speed and droop speed regulation
• Operating Temperature: -40°C ~ +70°C
• Installation: Standard panel mounting structure
• Configuration: External potentiometers for gain, ramp and compensation setting

Core Functions

• Real-time engine speed monitoring via magnetic pickup sensor signals
• Precise PID speed regulation to stabilize generator frequency under load fluctuation
• Realize balanced load sharing for multiple generator sets running in parallel
• Support configurable acceleration and deceleration ramp control logic
• Adjustable actuator compensation and dynamic response parameters
• Seamless switching between isochronous and droop operating modes
• Built-in overspeed protection logic to prevent prime mover damage
• Drive proportional fuel actuators to control engine fuel supply quantity
• Support load distribution communication bus for multi-unit parallel operation
• Long-term stable operation for continuous power generation equipment

Application Scenarios

• Parallel operation control of diesel generator sets and gas gensets
• Industrial combined heat and power cogeneration power stations
• Marine vessel auxiliary power generator control systems
• Oil & gas field distributed power generation equipment
• Standby power plants and critical backup power supply systems
• Small gas turbine generator speed and load control cabinets
• Mining and remote industrial site power generation control solutions
• Commercial building multi-generator parallel power supply systems
• Legacy 2301A control system maintenance and spare part replacement
• Energy industry prime mover speed governing and load management projects