What is a Linear Coil Actuator?
As one type of direct drive device, a linear coil actuator converts electrical energy into precise linear motion without involving a transmission mechanism. Unlike the conventional mechanical actuator, it is driven by electromagnetic force to generate high-speed, smooth, and accurate movement. Without mechanical linkages, the linear coil system results in zero backlash. With a higher acceleration rate, it has higher positioning accuracy down to the micron level.
How Does a Linear Voice Coil Actuator Work?
A linear voice coil actuator operates based on the Lorentz force principle, similar to permanent magnets operation in loudspeakers. Typically, it consists of the following components – high-performance permanent magnets, moving coil, encoders, Specialized vacuum tubes, and electrical interfaces. Here is how it works:
First, a permanent magnet creates a stable magnetic field. Then, when an electrical current flows through the coil, it generates an electromagnetic force. This force drives the coil to move in a straight line, enabling linear motion without mechanical contact or friction. In certain actuators equipped with high-precision encoders, real-time feedback is provided to ensure accurate positioning and force control.
Industrial Applications for Linear Voice Coil Actuators
Linear voice coil actuators feature rapid response times, precise force control, and no backlash, making them preferred for the following high-precision industrial applications.
Consumer Electronics: Smartphone screen testing, camera module assembly, and switch calibration.
Semiconductor Manufacturing: Accurate wafer handling, chip placement, and micro-assembly processes.
Medical Devices: Voice coil linear actuators offer High-precision control in imaging equipment, surgical robots, and lab automation.
Automotive and EV: Battery pack compression, component testing, and assembly line automation.
Scientific Research: Precision sample positioning, microscope automation, and test equipment.
Industrial Automation: High-speed sorting, measuring, and robotic arm control.
Why Choose Linear Coil Actuators from DH-Robotics?
DH-Robotics offers various selections of primary linear coil actuators, including linear systems, linear rotary systems, and direct drive linear rotary systems. Each item delivers superior accuracy, repeatability, and reliability, catering to demanding industrial environments.
Exclusive Soft Landing Technology
Our linear voice coil actuators utilize advanced soft landing technology, allowing them to approach targets quickly. As the actuator gradually shortens the distance to the target, it automatically adjusts its speed to prevent overshooting. Once it nears the desired position, the actuator transitions modes from position to speed, continuously monitoring position errors and current in real-time. Thanks to our exclusive technology, the actuator can contact the surface with minimal force, protecting sensitive components from potential damage. When the target surface is reached, the actuator maintains precise positioning.
Exceptional Performance
With micron-level positioning accuracy, our linear coil actuators provide precise movement even in the most demanding applications. The actuators can apply force as low as ±2g, protecting fragile components during operation. Featuring an ultra-thin 10mm profile, our VLA and VLAR series fit effortlessly into space-limited environments. Furthermore, they combine linear and rotary motion within a single unit, offering versatile functionality.
Request a consultation today to discover how our linear coil actuator can transform your precision motion control capabilities.
