| 摘要 |
A device includes a first magnet, a second magnet, and a coil. The first magnet is constrained to move in substantially-linear motion. The second magnet is mounted to move in rotational motion. The first and second magnets are positioned so the substantially-linear motion of the first magnet causes rotation of the second magnet. The coil is adjacent the second magnet, and rotation of the second magnet induces a current in the coil. |
