Electric Actuators

Electric Actuators

Electric actuators are used to move or control mechanisms and systems, often in industrial automation, robotics, and other mechanical applications. By converting electrical energy into motion, electric actuators enhance efficiency, reduce energy consumption, and offer greater flexibility compared to traditional pneumatic or hydraulic systems. John Henry Foster provides two primary types of actuators (linear and rotary), along with electric and pneumatic cylinders. Whether you’re optimizing manufacturing processes, enhancing robotic systems, or improving operational efficiency, our electric actuators deliver the precision and reliability you need. 

Key Features of Electric Actuators
  • High Precision and Control: Accurate positioning, force, and speed control.
  • Energy Efficiency: Consumes less energy compared to hydraulic or pneumatic systems.
  • Quiet Operation: Operates with minimal noise.
  • Low Maintenance: Fewer mechanical components mean reduced wear and tear.
  • Clean Operation: No risk of oil leaks, making them ideal for clean environments like food processing.
Types of Electric Actuators
Electric actuators are vital components in industrial automation, offering precise motion control to power a variety of mechanical systems. JHF provides several types of electric actuators, each tailored for specific motion and positioning needs.

  1. Linear Electric Actuators:
    Linear electric actuators convert electrical energy into linear or straight-line motion, making them ideal for applications like doors, lifts, or adjustable beds. They are highly versatile and often operate using electric motors driving a screw or belt mechanism. Some common applications include:

    • Opening and closing industrial valves
    • Adjusting conveyor belts or manufacturing equipment
    • Lifting and positioning systems

  2. Rotary Electric Actuators:
    Rotary electric actuators create rotational or circular motion, providing precise angular movement for components in various systems. They are typically used to rotate valves, gears, and other mechanical parts. Rotary actuators use an electric motor, usually combined with a gearbox, to convert electrical energy into rotational movement that can control rotational tasks accurately and efficiently. Common applications include: 

    • Rotating robotic arms or components in assembly lines
    • Controlling the position of satellite or antenna systems
    • Operating rotary valves in fluid control systems

  3. Stepper Motors:
    Stepper motors are a type of electric actuator that provides incremental rotational motion, offering precise, discrete control over position and speed without the need for feedback systems. They excel in applications requiring high repeatability and accuracy, including: 

    • 3D printing and CNC machinery
    • Positioning stages in laboratory or diagnostic equipment
    • Camera platforms and motion control in imaging systems

  4. Servo Motors:
    Servo motors deliver highly accurate motion by combining a motor with a feedback sensor for continuous monitoring and adjustment. These actuators are ideal for dynamic and high-speed applications where tight control of motion and position are necessary, including:

    • Robotics or automated manufacturing systems
    • Conveyor systems requiring variable speed and positioning
    • High-precision equipment like medical devices and aerospace systems
Applications
Automotive Industry: For adjusting mirrors, seats, windows, etc.
Robotics: To drive joints or limbs in robotic arms or humanoid robots.
Industrial Automation: For controlling valves, conveyors, or other mechanical systems.
Aerospace: To control flaps, doors, and landing gear.
Medical Equipment: In devices like surgical robots, adjustable hospital beds, and prosthetics.