Systems and methods for multi-stable solenoids
Magnetic damping rings in multistable solenoids address armature overshoot and impact forces by generating opposing forces, stabilizing the armature for precise operation.
JP7795292B2Active Publication Date: 2026-01-07HUSCO AUTOMOTIVE HLDG LLC
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Patent Information
- Application Number
- JP2020140624
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2019-08-22
- Filing Date
- 2020-08-24
- Publication Date
- 2026-01-07
- Estimated Expiration
- 2040-08-24
AI Technical Summary
Technical Problem
Conventional multistable solenoids suffer from armature overshoot and end-stop impact forces when moving between stable positions, leading to inefficient operation or inoperability.
Method used
Incorporation of magnetic damping rings along the armature's path to generate a magnetic damping force opposite to its direction of movement, reducing overshoot and impact forces by using multiple axially spaced wire coils and a permanent magnet armature.
Benefits of technology
The magnetic damping rings effectively control armature overshoot and impact forces, ensuring precise and efficient operation by stabilizing the armature at desired positions.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a multi-stable solenoid capable of providing stability to the solenoid when an armature is traveling between stable positions by reducing end stop impact force or intermediate position overshoot of the armature.SOLUTION: A multi-stable solenoid 100 includes a first wire coil 118, a second wire coil 120, and a third wire coil 122, and a magnetic damper 138 composed of a first damping ring 140, a second damping ring 142, and a third damping ring 144. The magnetic damper 138 forms a closed conductive path around a center axis 108. As an armature 124 and a permanent magnet 126 move between stable positions, current is induced inside the magnetic damper 138 and opposing magnetic damping force is generated. When the armature 124 is fired to a center magnetic detent position, overshooting is inhibited and prevented. When the armature 124 travels to a first end position or a second end position, impact force can be reduced.SELECTED DRAWING: Figure 5
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