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    A TOW LINE CONTROLLING DEVICE AND METHOD OF CONTROLLING SAME
    31.
    发明公开
    A TOW LINE CONTROLLING DEVICE AND METHOD OF CONTROLLING SAME 有权
    列车线控制装置和方法及其控制

    公开(公告)号：EP2844543A1

    公开(公告)日：2015-03-11

    申请号：EP13784479.1

    申请日：2013-04-29

    申请人： National Oilwell Varco Norway AS

    发明人： ERIKSSON, Hans, Anders

    IPC分类号： B63B21/18 ,  B63B21/56

    CPC分类号： B63B21/56 ,  B63B21/18 ,  B66D1/36

    摘要： A tow line controlling device (1) and a method of operation of a tow line controlling device (1) where the tow line controlling device (1) is positioned in a deck (4) of a vessel where the tow line controlling device (1) includes at least two tow pins (6) that are movable between a passive position and at least one active position, and where a gap between two of the tow pins (6) is spanned by a bridge (12) at least when the tow pins (6) are in one of their active positions, wherein a lower stopper (18) that is movable between a passive position and at least one active position, is positioned between two of the tow pins (6).

    METHOD FOR REDUCING COGGING TORQUE EFFECTS OF AN ELECTRICAL PERMANENT MAGNET MACHINE
    37.
    发明公开
    METHOD FOR REDUCING COGGING TORQUE EFFECTS OF AN ELECTRICAL PERMANENT MAGNET MACHINE 审中-公开
    法降低电永磁电机RAST失去作用，

    公开(公告)号：EP2258042A1

    公开(公告)日：2010-12-08

    申请号：EP09723983.4

    申请日：2009-03-16

    申请人： National Oilwell Varco Norway AS

    发明人： KYLLINGSTAD, Åge

    IPC分类号： H02P6/06 ,  H02P6/10

    CPC分类号： H02P6/10 ,  H02P6/06

    摘要： A method for reducing cogging torque effects of an electrical permanent magnet machine (1) where the machine (1) is connected to a drive (8), and where the drive (8) includes a feature of adding a torque component independent of a torque generated by a speed regulator, the machine having a rotor and a stator, where the method includes: - measuring the angular position of the rotor relative to the stator and the angular speed of the rotor by use of a sensor (6); - running at least two tests with at least two different cogging compensation signals from the drive (8) where one of the tests are designated an "a" test and another test is designated a "b" test; - analyse the received signal from the sensor (1) or sensors to find the corresponding amplitude and phase responses of the vibration signal for said tests; - calculate a first value by multiplying the complex cogging amplitude of the applied compensation signal for the a test with the complex amplitude of the vibration signal representing vibrations resulting from the cogging torque of the b test; - calculate a second value by multiplying the complex cogging amplitude of the applied compensation signal for the b test with the complex amplitude of the vibration signal representing vibrations resulting from the cogging torque of the a test; - calculate the desired complex cogging compensation amplitude by dividing the difference between said first value and said second value by the difference between the complex amplitudes of the vibration signals representing vibrations resulting from the b test and the a test; -apply a cogging compensation torque to the machine (1) based on the desired complex cogging compensation amplitude.