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An actuator is a component of a machine that produces force, torque, or displacement, when an electrical, pneumatic or hydraulic input is supplied to it in a system (called an actuating system). The effect is usually produced in a controlled way. [1] An actuator translates such an input signal into the required form of mechanical energy.
These include dc brush, dc brushless, stepper, or in some cases, even induction motors. It all depends on the application requirements and the loads the actuator is designed to move. For example, a linear actuator using an integral horsepower AC induction motor driving a lead screw can be used to operate a large valve in a refinery.
The blue valve body is visible in-line with the pipe. The valve actuator opens or closes the butterfly disc of the valve based on electrical signals sent to the actuator. Another valve actuator is visible in the background, with windows to indicate the valve position. A valve actuator is the mechanism for opening and closing a valve. Manually ...
The current ratio divides current assets by current liabilities. For instance, Alphabet’s Q2 2024 balance sheet had $162.0 billion in current assets compared to $77.9 billion in current liabilities.
A circuit where rectifier devices are externally controlled to change AC to current flowing in one direction. actuator An end device of a control system, that manipulates a physical variable such as a valve opening or position of a machine part. adaptive control A control strategy where parameters are adjusted as the controlled process changes.
A rotary actuator is an actuator that produces a rotary motion or torque. The simplest actuator is purely mechanical, where linear motion in one direction gives rise to rotation. The most common actuators are electrically powered; others may be powered pneumatically or hydraulically , or use energy stored in springs .
The device creates a magnetic field [1] from electric current, and uses the magnetic field to create linear motion. [2] [3] [4] In electromagnetic technology, a solenoid is an actuator assembly with a sliding ferromagnetic plunger inside the coil. Without power, the plunger extends for part of its length outside the coil; applying power pulls ...
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