Woodward EM‐80 and EM‐300 Actuators All‐Electric Actuator System

Applications

The EM-80 and EM-300 are intended to be mounted on large diesel, gas, and

gasoline engines, and on all types of turbines, to control the position of engine fuel

racks, turbine fuel valves, turbine and turbocharger variable geometry, and to handle

timing control. These systems are well suited for engines without a mechanical drive

or hydraulic oil supply.

Description

The EM-80 and EM-300 are all-electric actuator systems that provide 40 degrees of

actuator output rotation. Each system consists of a three-phase brushless ac motor

which drives a high-precision planetary reduction gear box. A dedicated driver

controls the actuator position and allows monitoring of most features.

PC/Windows based software facilitates the system setup. The EM-80 and EM-300

are freely programmable to meet many customer requirements.

 Fast slew times

 Freely programmable

 Brushless servomotor and resolver

 Precision gearbox, high stiffness, low backlash

 CE marking

 Models with ABS, BV, and DNV certification

 Cost effective solution

Features

The actuator output is an ISO 9409 flange. This allows for easy mounting of levers to

simplify replacement. The orientation of the output flange relative to the bracket base

is the same for each actuator. Additionally, the actuators are equipped with break-away

stops that prevent the actuator from exceeding the maximum output travel range

during setup. An output position indicator is standard.

The EM-80 and EM-300 systems include a mounting bracket with hole pattern. The

bracket design ensures that stresses in the actuator are reduced to a minimum.

Actuator specifications and performance are based on a system including bracket.

The actuators are equipped with a flying-lead position-sensor cable (including connector).

A position sensor cable connecting the actuator and the driver is available.

This cable is similar for both the EM-80 and the EM-300.

A single EM-driver is used for both the EM-80 and the EM-300. Only the software

setup for each actuator system differs. Monitoring, alarm, and diagnostics are available.

An EMI power filter is supplied to suppress emissions.

Optional Features

The EM-80 and EM-300 systems include a bracket for mounting on the engine or turbine.

A standard mounting hole pattern is provided. Alternative patterns are available on request.