Product Overview
The Woodward DPG-2201-002 is a microprocessor-based digital programmable governor belonging to the DPG 2201 series. Developed under Woodward APECS control platform, it delivers high-precision closed-loop speed regulation for diesel and gas generator sets. Supporting both isochronous constant-speed mode and droop control, it enables stable parallel operation and load sharing for multiple gensets. This compact unit directly receives magnetic pickup speed signals and outputs drive signals to compatible electric actuators, forming a complete prime mover governing system for continuous power generation applications.
Core Hardware & Functional Characteristics
Built with integrated keypad and digital display, the DPG-2201-002 allows on-site parameter tuning without extra configuration software.
- Flexible PID control algorithm with independent proportional, integral and derivative adjustments to match diverse engine characteristics
- Dual operating modes: isochronous control for standalone frequency stabilization; droop control ranging from 0–10% with 0.1% resolution for parallel gensets
- Precision frequency stability up to 0.25% across full operating temperature range
- Integrated startup smoke limiting, acceleration/deceleration ramp rate and torque limiting functions to protect engines during transient operation
- Wide power supply: 9–30 VDC, equipped with reverse battery polarity protection
- Serial communication port supports remote parameter configuration and status monitoring
- Die-cast metal housing with conformal-coated PCB, vibration-resistant and suitable for harsh engine room environments
- 13-terminal Euro-style terminal block for convenient wiring; compatible with DYNA series electric actuators
- Operating temperature range: -40°C ~ +85°C
Typical Application Scenarios
The DPG-2201-002 is widely adopted for stationary and mobile power generation equipment:
- Standby diesel & gas generator sets for industrial facilities, commercial buildings and offshore sites
- Multiple genset parallel systems requiring load sharing
- Marine auxiliary generator engines
- Pump drive and compressor prime mover speed control
- Retrofit upgrade of legacy analog governor systems
Sourcing & Commissioning Guidelines
- Full part number DPG-2201-002 must be fully matched. Different suffix variants within DPG-2201 series feature different actuator drive specifications and cannot be directly interchanged.
- ESD anti-static measures are required before handling the controller circuit board.
- After installation, verify magnetic pickup wiring polarity, set flywheel tooth count, PID gains, speed setpoint and droop parameters.
- Complete no-load and loaded transient testing to optimize governing response before formal unit operation.
Common Field Faults
- Engine speed hunting: improperly tuned PID parameters or poor magnetic pickup signal
- Failure to reach rated speed: incorrect actuator calibration or startup limit misconfiguration
- Unstable parallel load distribution: mismatched droop settings among multiple generators
- Communication failure: damaged serial cable or inconsistent communication parameters
