Introduction

This manual covers components of the EM-80/-300 Actuator System and does

not include operating instructions for the prime mover or the driven devices or

processes. For information about other Woodward products used in conjunction

with the EM-80/-300. please refer to the specific Woodward documentation

supplied with each product.

For specific operating information such as start-up, shutdown, and the prime

mover’s response to signals from the Woodward control, refer to the prime mover

manufacturer’s manual.

Description of Components

The EM-80/-300 system provides an all-electric actuation system for various

prime mover control applications.

The system is intended for use on large diesel, gas, and gasoline engines, and

on all types of turbines, to control the position of the engine fuel racks, turbine

fuel racks, turbine and turbocharger variable geometry, and to perform timing

control.

The EM Driver controls the EM-80/-300 Actuator position proportional to a

position demand signal received from a controlling device. The EM-80/-300

Actuator consists of a high-performance three-phase brushless ac motor that

drives a precision planetary gearbox.