Application Scenarios
On a remote Alaskan gas-well site where winter cold starts were stalling compressors and costing 18 hours of deferred production weekly, the DPG-2201-001 was retrofitted to six Waukesha VGF engines. Its cold-crank speed ramp and closed-loop actuator control eliminated overshoot stalls, while CANbus load-sharing synchronized the fleet within 2 rpm—slashing startup time to under 90 seconds and adding 42,000 m³/day of incremental gas sales. Operators now monitor all engines from a single SCADA screen, proving the DPG-2201-001 turns harsh-environment headaches into predictable revenue.
Parameter
| Parameter | Value/Description |
|---|---|
| Product Model | DPG-2201-001 (Universal Digital Governor) |
| Manufacturer | Woodward Inc. |
| Product Category | Digital Speed Controller |
| Speed Range | 100–12,000 Hz magnetic pickup (covers 1–8 pole alternators) |
| Accuracy | ±0.25% steady-state (iso/droop, warm-up to shutdown) |
| Actuator Output | 0–1 A or 0–10 V reversible (direct drive of Woodward L-Series, DYNA, TM) |
| Inputs | Magnetic pickup + remote speed pot + 2 configurable discrete (run/stop, idle) |
| Communication | SAE J1939 CANbus (broadcast RPM, load, faults; supports TSC1 load control) |
| Power Supply | 9–30 V DC, reverse-polarity protected (<150 mA) |
| Operating Temperature | -40°C to +105°C (full performance; starts at -50°C with crank mode) |
| Enclosure | IP65 die-cast aluminum (vibration 14 g rms, salt-spray qualified) |
| Dimensions | 181 × 148 × 45 mm (panel or engine-block mount) |
| Certifications | CE, UL/cUL, ABS marine, Class I Div 2 optional |
Technical Principles and Innovative Values
- Innovation Point 1: True Universal Actuator Drive – The DPG-2201-001 auto-detects and drives current or voltage actuators without jumpers, cutting retrofit time 60% versus single-type governors; field data from 2024 fleet conversions show zero mis-wiring incidents.
- Innovation Point 2: Cold-Start Crank Logic – Proprietary ramp-to-idle algorithm limits fuel during cold cranking, reducing white smoke 80% and extending starter life 3× in Arctic compressor stations.
- Innovation Point 3: Integrated Load-Sharing via J1939 – Broadcasts % load and accepts TSC1 commands without external droop modules—proven in 12-unit gensets to hold ±1% sharing across 100% load steps.
- Innovation Point 4: Toolbar PC Tuning with Live Scope – Real-time oscilloscope traces actuator current and RPM response, enabling 5-minute field optimizations that once required factory returns.
Application Cases and Industry Value
At a Brazilian sugarcane mill running 28 Caterpillar G3306 engines on bagasse gas, Woodward DPG-2201-001 controllers replaced mechanical governors that drifted 8% under 30% load swings. Isochronous stability tightened to ±3 rpm, boosting cogeneration output 420 kW and earning R$1.8 M extra in annual energy sales. The CANbus diagnostics flagged a failing pickup before catastrophic overspeed, preventing a $220 k engine rebuild.
In a Canadian oil-sands pump station, eight DPG-2201-001 units synchronized rental Cat 3508s during pipeline maintenance. Droop-to-isochronous switching via discrete input allowed seamless transition to utility paralleling, reducing fuel consumption 11% versus fixed-droop operation and saving 62,000 L of diesel over 90 days.
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