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Woodward 9905-659
Product Name: Woodward 2301A Series Load Sharing and Speed Control (9905/9907 Series)
Product Introduction: Based on series-level documentation, the 9905-659 belongs to the Woodward 2301A 9905/9907 series of electronic load sharing and speed controls. These controls govern the speed and load sharing of generators driven by diesel or gasoline engines, or steam or gas turbines. Verified public information specific to the exact configuration of 9905-659 (e.g., voltage class, actuator current range, forward/reverse acting, single/tandem actuator) is limited to series-level documentation.
Detailed content
Technical Specifications (Series-Level):
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Speed Ranges (switch-selectable): 500–1500 Hz, 1000–3000 Hz, 2000–6000 Hz, or 4000–12000 Hz
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Actuator Output: 0–200 mA (compatible with single or tandem actuators depending on model)
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Power Supply: Low-voltage model (20–40 Vdc) or High-voltage model (90–150 Vdc or 88–132 Vac, 45–440 Hz)
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Operating Temperature: –40 °C to +70 °C
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Humidity: 95% RH non-condensing
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Construction: Sheet-metal chassis with a single printed circuit board; all potentiometers accessible from the front
Functional Features:
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Isochronous or droop speed control
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Isochronous load sharing
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Adjustable idle to rated speed linear ramps
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Start fuel limiting with failed speed signal override
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Four switch-selectable speed ranges
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Available in forward- or reverse-acting configurations
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Compatible with single or tandem actuators
Application Scenarios: Generator systems driven by diesel engines, gas engines, steam turbines, or gas turbines. Suitable for standalone operation, isolated bus paralleling, and infinite bus base loading.
Working Principle: The 2301A control operates using proportional-integral control. It measures actual speed via an MPU signal and compares it to the reference speed. The error is processed and output as a 0–200 mA signal to drive the proportional actuator positioning the fuel-metering device. Load sharing is achieved via load-sharing lines connecting multiple 2301A units.
