Electric solenoid actuators are electromagnetic devices used for remote actuation of secondary mechanisms. They consist of a coil, plunger, and control circuit. When energized, the magnetic field pulls the plunger towards the coil, providing actuation. They are simple, reliable, and have only one moving part.
An electric solenoid actuator is an electromagnetic device that is used to provide remote working motion in order to switch, move, or otherwise actuate a secondary mechanism. These devices are typically used when performing these actions manually is not practical or safe. Electric solenoid actuators are simple, reliable devices that have only one moving part. They generally consist of a static wound wire coil connected via a control circuit to a suitable electrical supply and a spring-loaded movable metal plunger connected to the secondary mechanism. When the coil is energized by an electric current, a powerful magnetic field is generated, which pulls the plunger towards itself, providing the actuating movement required in the process.
The inevitable need for remote actuation of devices is a reality in most fields of mechanical, electrical and electronic engineering. Devices that require activation in small, inaccessible locations, at long distances from concentrations of personnel, or in hazardous environments require a remote source of activation input initiated by operator input or by an automated system. One of the most reliable, inexpensive and simple of these remote devices is the electric solenoid actuator. Rugged and free of complex, high-maintenance parts, these devices are capable of producing linear, bi-directional actuation motion with a single moving part. In fact, they rarely have more than two distinct parts in total.
The medium electric solenoid actuator consists of a coil of static wire wound on a hollow, non-conductive coil. This coil is connected to a suitably sized alternating current (AC) or direct current (DC) power circuit, including a control system that allows the solenoid to be powered on demand. A movable ferrous metal plunger is placed near the coil, parallel to its hollow core. In most cases, the plunger has a coil spring placed around its body, and the spring is compressed as it moves. The plunger is, in turn, connected via a link to the device requiring activation.
When the control circuit is activated and the electric solenoid actuator coil is energized, a strong magnetic field is generated around it. This magnetic force acts on the plunger pulling it rapidly towards the coil, compressing the spring as it does so and providing the first stage of bi-directional movement of the solenoid. This movement is the working agent which then, due to the attachment of the plunger to the secondary device, provides the actuating force. When the control circuit is deactivated and power to the coil is removed, the compressed spring returns the plunger to its original, neutral position, thus providing the second stage of movement. The electric solenoid actuator is then reset and is ready for the next work cycle.
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