WOODWARD 9905-020 D Speed Controller

WOODWARD 9905-020 D Speed Controller (2301A Load Sharing & Speed Control)

 

 

The Woodward 9905-020 D is a 2301A series electronic load sharing and speed control module, used for precise engine/generator speed regulation and load sharing control in industrial power systems.

Basic Information

• Part Number: 9905-020 D
• Brand: Woodward
• Series: 2301A Load Sharing & Speed Control
• Type: Electronic Speed Controller / Governor Control Module
• Function: Controls engine speed and generator load sharing

Technical Specifications

• Power Supply: 20–40 VDC (SELV low-voltage supply)
• Actuator Output: 0–200 mA DC (proportional control output)
• Operating Temperature: -40°C to +85°C
• Control Type: Forward-acting speed control
• System Type: Single actuator control (no deceleration ramp in this variant)
• Inputs: Speed sensing (MPU / pickup), load sharing signal, remote speed reference
• Terminal Count: ~29 terminals (system dependent configuration)

Key Features

• Precise engine speed regulation under varying load conditions
• Supports generator load sharing and synchronization systems
• Stable closed-loop control for industrial prime movers
• Compatible with diesel & gas engine governor systems
• High reliability for continuous operation environments
• Designed for power generation and marine applications

Application Areas

• Diesel generator sets (gensets)
• Gas engine power systems
• Marine propulsion engines
• Power plants (standby & prime power)
• Industrial mechanical drives
• Oil & gas auxiliary power systems

System Role (Important)

The 9905-020 D acts as the control brain of the governor system, responsible for:

• Reading engine speed (MPU signal)
• Comparing with setpoint
• Adjusting actuator current output
• Maintaining stable RPM under load changes
• Coordinating load sharing between multiple generators

Advantages

• High accuracy speed regulation (tight droop control)
• Reliable load sharing between multiple generator sets
• Industrial-grade stability for harsh environments
• Wide compatibility with Woodward actuator systems
• Proven long-term performance in global power systems

Precautions

• Must be powered with correct SELV 20–40 VDC supply
• Incorrect wiring may damage actuator output stage
• Proper speed sensor (MPU) must be installed and calibrated
• Do not use as standalone controller without governor actuator system
• Ensure correct configuration for load sharing mode