8400-015 WOODWARD

Description

WOODWARD 8400-015 DIGITAL SPEED CONTROL

Product Dimensions：

DYNA 8000, DYNA 8200, and DYNA 8400 governor systems provide engine
governing for speed and power control of piston and gas turbine engines or
steam and water turbines. The system components are a rotary actuator and an
electronic controller, both of which are described further in this manual.
ACTUATOR
The actuator consists of an electromagnet with an iron armature rolling on the
center shaft bearings. The actuator is provided with a return spring which
balances the magnetic force of the armature. When DC current flows in the coil,
the magnetic force moves the armature in the stator and this linear motion is
transformed into rotary motion through a crank arm that forms part of the output
shaft.
CONTROLLER
The electronic controller is the information processing unit of the governor
assembly. It contains electronic components which process the input signal from
the magnetic pickup to command the engine to the desired speed/RPM set into
the controller. Electronic adjustments are available on the controller for field
adjusting the unit as necessary.
DC POWER SOURCE
The governor system receives its power from a battery or an AC to DC power
supply supplying 12 or 24 Vdc ± 20% to match the governor voltage. The
average operating current consumption is 2.5A to 3.5A and the highest
consumption is 14.75A during engine start-up or during a large load change.
The power source must be rated above maximum stall current.
ISOCHRONOUS OPERATION
Isochronous operation is obtained by setting DROOP potentiometer fully
counterclockwise. The DYNA governor is all electric, and it is normally operated in
the isochronous mode; i.e., engine RPM is constant (± 0.25%) under steady state
load conditions, up to the engine’s maximum capability, regardless of load on the
engine

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