| 摘要 |
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 move from a first to a second position. Once the stator magnetic cup has travelled to a mechanical movement limit, the control circuit reduces the activation current to a lower holding level to reduce power consumption and heat dissipation in the solenoid device.
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