In digital control systems, system outputs are achieved through the use of electrical actuators. Electrical actuators are a type of actuator that convert electrical energy into mechanical motion.
These devices are widely used in various applications to control physical processes or systems and comes in a number of different forms.
10. Electrical actuators play a crucial role in systems by enabling precise control of motion.
What is the function of an electrical actuator?
Electric Motors
Electric motors are among the most prevalent electrical actuators. They convert electrical energy into mechanical motion, typically rotary motion. There are two primary types of electric motors:
DC Motors
Direct current (DC) motors operate on a constant voltage source and are commonly used in applications such as battery-powered devices, electric vehicles, and robotics.
AC Motors
Alternating current (AC) motors are used in a wide range of applications, including industrial machinery, household appliances, and HVAC systems.
Brushless motors
Electrical motors that provide mechanical motion without the need for brushes and commutators, which are commonly found in brushed DC motors. They are known for their efficiency, reliability, and precise control.
They are commonly found in CPU cooling fans and drone propeller motors.
3. An electric motor is an example of an electrical actuator that converts into rotational motion.
Servo Motors
Servo motors are a specialized type of electric motor designed for precision control of position, speed, and torque. They are often used in robotics, CNC machinery, and other applications where accurate and responsive control is necessary.
Stepper Motors
Stepper motors move in discrete steps, making them suitable for applications that require precise positioning. They are used in 3D printers, CNC machines, and camera lenses.
What is the advantage of a stepper motor over a DC motor?
Solenoids
Solenoids are electromechanical devices that use an electromagnetic coil to generate a linear motion or a push-pull action. They are commonly found in applications like door locks, valves, and automotive systems.
9. Electric solenoids are often used as to control the flow of fluids in a system.
Linear Actuators
Linear actuators are devices that provide linear motion in response to electrical signals. They are commonly used in applications where controlled movement in a straight line is required, such as in adjustable furniture, solar panels, and robotics.
Which of the following is a type of electrical actuator?
Piezoelectric actuators
Piezoelectric actuators use the piezoelectric effect, where certain materials change shape in response to an applied voltage. They are employed for applications that require high precision, such as adjusting optics in cameras and manipulating tiny objects in micro- and nanoscale environments.
A common application of piezoelectric actuators is in inkjet printers.
