Bistable rotary solenoid

Without using a spring, return to the home point with the magnetic force of the permanent magnet. Because it does not use the spring, it is highly reliable design that is not affected by performance degradation over time.

rotary solenoids use cylindrical permanent magnet as the rotor and produce true rotational motion from the repulsive and attractive forces induced between the permanent magnet and the magnetic poles in the yoke. Even after de-energization, the solenoids stay in position using the holding force of the permanent magnet. Unlike conventional rotary solenoids built to mechanically convert the back-and-forth linear motion (thrust-direction motion) of the shaft into rotational motion, our rotary solenoids produce rotational motion with no axial movement of the shaft and hence have a longer life.

1. It's bi-stable Bi-stable type switches clockwise and counterclockwise rotation every time the current direction is changed between +(positive) and –(negative). Even after de-energization, the solenoid stays in its position using the holding force of the permanent magnet.
 Unlike the rotary solenoids that use a spring for the motion of one direction, bi-stable solenoid rotate in both directions by magnetic force and current pulse.

2.High power and fast response It is high power and quick response because this solenoid reciprocates by the change of current direction, +(positive) and –(negative), instead of using spring.

3. Flexibility in travel angle up to 90° Travel angle can be set up to 90° depending on your application requirement.

4.Extremely silent There is no axial motion of the shaft in thrust direction and the end stops are set externally.  This leads to minimizing the impact noise when in operation. 
 For types with internal end stops, countermeasures are taken for impact and vibration by carefully choosing the buffer used for the stops.

5. Long Life Long life because of no sliding parts except for the bearing.

6. Return-by-spring type is also available Self-restoring types using spring return are also available, enabling a fail-safe capability.