5484-803   Plus 6 Actuator & Electronic Controller Systems

Description

Overview

Essential details：5484-803   Plus 6 Actuator & Electronic Controller Systems

Electronic Control Box

This rugged container houses the electrical components used in controlling the actuator output and ultimately the engine. The components and container are designed to withstand 20 G’s of mechanical vibration through 500 Hz. The control box is mounted directly on the actuator and is electrically connected to the actuator through a 5-pin connector.

The electronic control box receives electrical input signals from both the magnetic speed sensor and the reference speed pot. These signals are processed and compared, resulting in an error signal that is amplified and sent to the actuator in a proportional, integral and derivative summation. When the actuator receives the desired output shaft electrical signal, the output shaft rotates and a feedback is sent and compared to the desired signal. Any difference is transmitted to the power amplifier, which sends corrective action to the output shaft position.

Junction Box

An optional junction box can be used to house the reference speed potentiometer and the power switch. It can be mounted for convenient connection to the electronic control box, power source, and magnetic speed sensor.

Magnetic Speed Sensor

The magnetic speed sensor, typically mounted on the flywheel housing, generates electrical pulses proportional to speed by sensing magnetic material, i.e., teeth on the engine ring gear passing the sensor.

Actuators

The actuators are electrically connected to the electronic control box and their mechanical output is connected to the engine’s fuel system. Actuators are electrically powered and have output work capacities of 1, 2, 4, and 6 ft-Ibs. The actuators convert an electrical input to an angular mechanical output at the output shaft, which has a maximum rotation of 45°.

5484-803

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5484-803   Plus 6 Actuator & Electronic Controller Systems

Four auxiliary control modules are available:

• Isochronous load sharing control
• Auto-synchronizer
• Ramp generator
• Single phase load pulse control

These and other auxiliary functions, such as remote speed setting and Kw limits, can be installed at the time of the initial governor installation or, just as easily, added later when the need arises. No modification to the basic governor is required when these auxiliary functions are added. In fact, if the prewired harness is used, the wires necessary to add these features are often already provided, further simplifying installation.

Speed Governing

APECS controllers are available for engine governing for speed and power control of piston and gas turbine engines where the fuel is controlled by the governor’s output shaft. The controllers are also applicable for controlling steam and water turbines.

Tandem Engine Governing

The APECS controller provides the precise positioning required for accurate tracking of two governor actuators used for controlling tandem-coupled engines.

No-Break Engine Governing

APECS controllers are designed to provide dual-mode operation. The controller functions with fixed gain when the engine is declutched and with an adjustable high gain when the engine is coupled to the load.

Propulsion Governing

APECS controllers are available for engine governing of propulsion engine applications. The controller has an adjustable low limit feature that is required to maintain correct engine operation due to the loading characteristics of the propeller. The same controller should be used on tandem-coupled propulsion engine applications.

Wide Speed Range Governing

APECS controllers provide governing for speed and power control of piston and gas turbine engines where the fuel is controlled by the governor’s output shaft.

The controller is designed to provide improved governor performance and control over a wider speed range than standard speed governors.