DRIVE SYSTEM WITH ELECTROMAGNETIC ENERGY TRANSFER

    公开(公告)号:US20180248460A1

    公开(公告)日:2018-08-30

    申请号:US15755568

    申请日:2016-09-19

    IPC分类号: H02K41/03

    摘要: The invention relates to a drive system (1) with electromagnetic energy transfer. The system (1) comprises a track (3) comprising a plurality of stators (4), each stator (4) having at least one winding adapted to generate a magnetic field having a fundamental harmonic (8) and at least one further harmonic (9) when fed with an varying current, and a movable element (2) comprising a primary magnetic element (5) adapted to receive said fundamental harmonic (8) to drive said movable element (2) along said track. The system (1) is characterized in that said movable element (2) further comprises a secondary magnetic element (6a-6c) adapted to receive said at least one further harmonic (9) to generate power onboard of said movable element (2). The invention also relates to a linear fractional slot synchronous machine and a rotational synchronous machine.

    LENS DRIVE DEVICE AND ELECTROMAGNETIC DRIVE UNIT

    公开(公告)号:US20180224631A1

    公开(公告)日:2018-08-09

    申请号:US15891503

    申请日:2018-02-08

    申请人: TDK CORPORATION

    发明人: Shusuke ICHIHASHI

    IPC分类号: G02B13/00 H01H47/22

    摘要: A lens drive device includes a movable portion, a fixed portion, and a nonmagnetic case. The movable portion includes a double-pole magnet having two pairs of magnetic poles, a first coil opposing to the double-pole magnet in a perpendicular direction to a light axis, and a lens holder being movable to the double-pole magnet in a direction of the light axis. The fixed portion includes a second coil arranged so as to oppose to the double-pole magnet in the direction of the light axis. The nonmagnetic case is attached to the fixed portion so as to cover the movable portion. The double-pole magnet includes a first section and a second section. L1/L2 is 0.9 to 1.1, where L1 and L2 are respectively a length of the first and second sections in the direction of the light axis.