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 Dresser-Rand's TerryTM
turbine digital
governor design
incorporates a
state-of-the-art digital design of the Woodward 505 controller
as supplied by Engine Systems, Incorporated (or ESI); an
electro mechanical, direct coupled actuator; a servo-amplifier
and speed probes.
Turbine
speed is monitored by a magnetic speed pick-up, which in turn
provides a signal to the digital controller. The digital
controller provides a 4-20 milli amp signal to the
servo-amplifier, which controls the electro-mechanical actuator.
The actuator, which includes a built-in internal resolver,
provides positional feedback to the controller.
The result is a digital
solution that eliminates the driven EGR (Electronic Governor
Remote); the remote servo and
hydraulic subsystem; the mechanical linkage between servo and
valve stem; and the EGM (Electronic Governor Mechanical), RGSC (Ram
Generator Signal Converter), and dropping resistor.
 The Dresser-Rand
Digital Control System is programmable via laptop; powered by
120 VAC (Volts Alternating Current), 125 VDC (Volts Direct
Current), or 250 VDC; offers a total power consumption
of one AMP or less; meets both mild and harsh environment
requirements; and
is fully supported by Dresser-Rand's 10CFR50 Part 21 dedication
process.
Our Digital Control
System combines state-of-the-art design and client performance
requirements into a simple and effective package. Concern over
turbine overshoot is mitigated and component obsolescence is
eliminated. The result is a turbine system that is easier to
maintain, extremely easy to calibrate, offers better
reliability, and affords quicker response to the needs of the
system.
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