High torque rotary solenoid
US4959629A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 1989 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | May 24, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/145
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high torque rotary solenoid is disclosed employing attracting and repelling forces of permanent magnets to induce rotary motion is disclosed. Four arrays of magnets are located on a stator and rotor and are arranged along the axis of rotation of a shaft. Two magnet arrays are located on the stator, and two magnet arrays are located on the rotor. Each of the magnet arrays on the stator is arranged to come in close proximity to one of the magnet arrays on the rotor when the rotary shaft is positioned to the clockwise or counterclockwise rotary motion limits. The rotary solenoid has two rotational positions, each position corresponding to the mechanical limits of rotational movement. A linear solenoid repositions the two permanent magnet arrays attached to the stator by moving the stator axially along the rotary shaft thereby reversing the existing polarity alignment of the arrays of magnets on the rotor versus the stator magnet arrays and creating rotational movement as a result of the attracting and repelling forces of the magnet arrays. A power saving electrical control circuit is also disclosed, providing a high current initial activation signal thereby inducing the stator to mo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.