World News

How Do 3-Position Rotary Solenoids Work?

What Are Rotary Solenoids?

These are devices that specialize in converting electrical energy into rotational mechanical energy. When electricity flows through a solenoid, that is, a coil of wire, inside the device, a magnetic field is created. What creates the torque or rotational force used to move the shaft of the device is the orthogonal component of the magnetic field in relation to the poles of the internal drive magnet.

For lightweight mechanical linkages, miniature rotary solenoids can be used as rotary actuators.

What Are 3-Position Rotary Solenoids and How Do They Work?

Rotary solenoids prepared by Brandstrom Instruments function on the principle of an electromagnetic spring-free system. Based on the application, the electrical and mechanical operating parameters can differ between rotary solenoids, but all of them are subject to one of the three configurations: Bi-stable solenoid, self-restoring solenoid, and 3-position rotary solenoid.

The 3-position rotary solenoid is balanced magnetically in the center until it is energized. The shutter then moves to position 2 and stays there before returning to the center position when the power is removed. Likewise, the shutter is rotated to position 3 by applying a reverse polarity pulse in the opposite direction. Again, the shutter remains at position 3 until the power is removed, upon which it returns back to the center.

These prove extremely valuable for mechanical optical shutters, which have a variety of applications as well as ensure fast transition times for light filtering, light deflecting, and light blocking solutions.

Solenoids are particularly useful for custom cShutters, which ensure consistent and highly accurate aperture control. For laser applications, however, it is important to consider the beam size and power density to choose the appropriate blade angle, coating, and heat-dissipating geometry based on the unique requirements of the customer.

What creates the torque or rotational force used to move the shaft of the device is the orthogonal component of the magnetic field in relation to the poles of the internal drive magnet. For lightweight mechanical linkages, miniature rotary solenoids can be used as rotary actuators.

The 3-position rotary solenoid is balanced magnetically in the center until it is energized. The shutter then moves to position 2 and stays there before returning to the center position when the power is removed. Likewise, the shutter is rotated to position 3 by applying a reverse polarity pulse in the opposite direction.

Show More

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to top button
Close
Close