2301 Series Speed Control Amplifier Part 8270-768 for Diesel & Gas Prime Movers
Product Overview
The Woodward 8270-768 belongs to the iconic 2301 Analog Amplifier Series, a legacy analog power amplifier module designed to work alongside Woodward 2301A electronic speed controls, delivering amplified proportional output signals to hydraulic and electromagnetic fuel/steam actuators. As a core component of traditional mechanical-electronic governing systems, the 8270-768 amplifier converts low-level speed error signals from the 2301A speed controller into sufficient drive current to precisely position engine fuel racks or turbine steam valves, maintaining stable prime mover speed under varying load conditions.
Part number 8270-768 falls under Woodward’s 8270 material number segment dedicated to analog governor power amplifiers, sharing the same 2301 AMPLIFIER platform architecture as other 8270-series amplifier variants such as 8270-975. It is a direct matching analog power stage for early 2301 and 2301A speed control units (part numbers starting with 9905 / 9907), helping buyers maintain a complete closed-loop speed regulation system for reciprocating engines and small industrial turbines.
Key Applications
Land-based diesel/gas generator sets (isochronous & droop parallel load sharing)
Marine main propulsion and auxiliary generator engines
Small steam turbines & gas turbine prime movers
Retrofit upgrade of legacy mechanical governor systems to electronic analog governing
Equipment requiring reverse-acting and forward-acting actuator compatibility
Core Product Features
2301 Series Standard Amplifier Architecture
Optimized signal matching with Woodward 2301A speed controller (Manual 82020 D specification), perfectly aligned with the controller’s internal summing amplifier output to eliminate signal distortion during amplification. Supports speed signal frequencies from 500 Hz up to 12,000 Hz via compatible MPU magnetic pickup setups.
Stable Dynamic Governing Performance
Built-in actuator compensation circuit to counteract hydraulic actuator lag; adjustable gain response to suppress speed hunting during sudden load changes. Supports both isochronous constant-speed operation and droop mode for grid-parallel generator load sharing, consistent with 2301A control tuning logic.
Wide Compatibility with Woodward Actuators
Delivers regulated drive current for EG series proportional actuators and EGB reverse-acting governor actuators. Compatible with tandem actuator wiring configurations for dual-engine synchronization systems as documented in the 2301A installation manual.
Industrial Ruggedized Construction
Compact metal chassis with PCB static protection complying with Woodward ESD handling standard Manual 82715. Operating ambient temperature range of -40°C to +85°C, with a built-in overcurrent auto-reset circuit breaker to protect the actuator output against short-circuit damage.
Dual Operating Compatibility
Supports forward-acting and reverse-acting system wiring layouts. Reverse-acting configuration enables mechanical ballhead governor backup upon electronic signal loss, preventing prime mover shutdown and avoiding catastrophic overspeed risks per Woodward safety specifications.
System Composition Matching
A complete governing system utilizing the 8270-768 2301 amplifier includes:
Woodward 2301A speed control unit (9905 / 9907 part family)
8270-768 analog power amplifier
Magnetic pickup (MPU) speed sensor
Proportional fuel/steam actuator (EG / EGB series)
Shielded twisted-pair control wiring per EMI control guidelines
Technical & Safety Compliance
Designed to meet EMC Directive EN50081-2 and EN50082-2 when installed per Manual 82020 wiring instructions. All circuits incorporate electrostatic discharge protection; unit assembly follows Woodward’s industrial electronic control manufacturing standards for power generation and marine hazardous zone auxiliary equipment.
Order & Replacement Notes
8270-768 is an original legacy 2301 series amplifier spare part within the Woodward 8270 component family. For replacement, cross-reference with other 8270 amplifier variants and confirm matching 2301A controller voltage rating (10–40 Vdc low voltage / 88–131 Vac high voltage) before unit exchange. Global Woodward authorized distributors supply flat-rate repair, remanufacture, and same-unit exchange services for this amplifier model to minimize generator and prime mover downtime.
Short Selling Bullet Points (Sidebar Quick Specs)
Part Number: 8270-768
Product Series: 2301 Analog Speed Control Amplifier
Material Code Segment: Woodward 8270 Amplifier Family
Matching Controller: 2301A Speed Control (PN 9905 / 9907 range)
Supported Prime Movers: Diesel engines, gas engines, small steam/gas turbines
Key Functions: Signal amplification, actuator drive, speed loop stabilization
Safety Design: Overcurrent protection, ESD shielding, reverse-acting backup governor support
Standard Compliance: Woodward Manual 82020, EMC industrial electromagnetic standards
