Woodward EM-80/EM-300 Actuator system

command signal into a hexadecimal position address. The PLC is programmed

with the specific algorithms to define rotation direction and stroke. The PLC and

the motor controller module are communicating by means of a parallel interface.

The interface takes care of the cyclic update of the position command signals

and the non-cyclic calls for parameters.

The PLC logic program also defines the start-up sequence and enabling of the

motor control module.

Motor Driver Module Description

The Motor Driver module consists of two parts, the feed current converter on the

mains side and the motor-end inverter.

 The supply converter for generating the intermediate circuit voltage is

designed as an unregulated diode bridge. To reduce the starting current

inrush, the system charges the intermediate circuit capacitors via a charging

resistor (an NTC thermistor).

 The IGBT motor-end inverter processes the transistor control signals, which

the controller supplies, and provides the measuring signals for closed-loop

control. The Motor Driver module has its own monitoring facilities (selfprotecting

power section).

Feed Current Converter

Within the Motor Driver module, the feed current converter is an unregulated

rectifier with starting current load relief.

The driver is the device which receives the actuator position command signal

from the controller and positions the actuator by means of controlling the current

and potential of the three phases of the actuator electromotor. The driver is

loaded with configuration settings for the EM-80 or EM-300 actuator and with an

application file for the proper and safe operation of the actuator system.

The driver is an integrated package of two main modules.

 Motor Controller module

 Motor Driver module

3522-1009

Marine Type Approval Compliance

Bureau Veritas (BV) Certified under BV Rules for the Classification of Steel

Ships.

EM 80 Driver 3522-xxxx

EM300 Driver 3522-xxxx

EM80 Actuator 8256-308

EM300 Actuator 8256-310

Det Norske Veritas Drivers 3522-1004 through 3522-1012

(DNV) EM-300 Actuators 8256-308 & 8256-310

Certified for Marine Applications

Temperature: Actuator Class B, Driver Class A

Humidty: Actuator and Driver Class B

Vibration: Actuator Class B, Driver Class A

EMC: Actuator and Driver Class A

Enclosure: Actuator Class C, Driver Class A