Technical specifications and applications of Woodward EM-80/EM-300 all electric actuator system

Technical specifications and applications of Woodward EM-80/EM-300 all electric actuator system

The EM-80 and EM-300 all-electric actuators provide precision, high-torque rotary positioning without using a mechanical drive or hydraulic oil supply from the engine. This actuator system is intended to be mounted mainly on large diesel and gas engines to control the position of engine fuel racks. While less common an application, they may also be used on various types of turbines to control turbine fuel valves, turbine and turbocharger variable geometry, and to handle timing control.

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.

The EM driver controls the EM-80/-300 actuator position and consists of a power board and a controller in one enclosure. The driver is a programmable digital controller to accommodate custom requirements.

Key specification parameters

(1) Core parameters of actuator (EM-80 vs EM-300)

Project EM-80 EM-300

Continuous output torque 91 N · m (67 lb ft) 260 N · m (192 lb ft)

Peak output torque (1 second) 190 N · m (140 lb ft) 429 N · m (316 lb ft)

10-90% unloaded sleep time 78 ms 192 ms

Output stroke 0-40 ° (without internal mechanical limit) 0-40 ° (without internal mechanical limit)

Weight (including bracket) 35 kg (77 lb) 38 kg (84 lb)

Working temperature 0-85 ℃ (environment) 0-85 ℃ (environment)

Storage temperature -30-100 ℃ -30-100 ℃

(2) Drive core parameters

Power supply: three-phase 400-480 Vac (50-60 Hz), supports single-phase 230 Vac redundant power supply (for emergency use only); Control power supply 24 V ± 10% (maximum 55 W).

Signal interface: Control input 4-20 mA, position output 1-5 V.

Environmental adaptability: working temperature 0-55 ℃, relative humidity ≤ 85% (no condensation), protection level IP20, installation altitude ≤ 2000 m.

Physical characteristics: Weighing 3.8 kg, it needs to be installed inside the control cabinet and cannot be directly installed on the engine.

Core functions and configurations

Structural design: The actuator is equipped with an ISO 9409 output flange for easy lever installation and replacement; Comes with an installation bracket to reduce operational stress; Equipped with a detachable limiter to prevent overtravel.

Universal compatibility: EM-80 and EM-300 share the same driver and only need to distinguish the model through software configuration.

Auxiliary configuration: Includes position sensor cable (maximum distance between driver and actuator is 100 meters), optional EMI filter to suppress electromagnetic radiation (not recommended for IT grounding system).

Compliance and Certification

European compliance: Complies with the Low Voltage Directive (2014/35/EU), EMC Directive (2014/30/EU), and bears the CE mark.

Maritime certification: Passed ABS (2015 Steel Ship Rules), BV (Steel Ship Classification Rules), LR (Classification Society Certification), RMRS (Russian Maritime Certification).