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    DAMPED ELECTRIC MOTOR
    2.
    发明公开
    DAMPED ELECTRIC MOTOR 审中-公开

    公开(公告)号：EP3490113A1

    公开(公告)日：2019-05-29

    申请号：EP17203647.7

    申请日：2017-11-24

    申请人： Goodrich Actuation Systems Limited

    发明人： BENAROUS, Maamar

    IPC分类号： H02K3/20 ,  H02K3/16 ,  H02K1/16 ,  H02K1/14

    摘要： An electric motor and a method of making the electric motor is disclosed herein. The motor comprises a stator (30) and a rotor (20) being arranged coaxially, with said rotor provided internally of said stator. The stator having one or more stator teeth (52) extending radially inwardly towards said rotor. The rotor has a plurality of magnets (22) forming an outer rotor surface. A first face (58) of the or each stator tooth faces the outer rotor surface. An electrically-conductive non-magnetic damper bar (54) is partially embedded in the or each stator tooth, the or each damper bar having an outer damper bar surface (55). A groove (60) is formed in the first face of the or each stator tooth to at least partially expose the outer damper bar surface. The groove can improve flux linkage between the rotor and the damper bars and thus improve the damping of the electric motor.

    COUNTER-FIELD WINDING IN ELECTRICAL GENERATOR
    3.
    发明公开
    COUNTER-FIELD WINDING IN ELECTRICAL GENERATOR 审中-公开

    公开(公告)号：EP3480937A1

    公开(公告)日：2019-05-08

    申请号：EP18183335.1

    申请日：2018-07-13

    申请人： The Boeing Company

    发明人： Gao, Lijun ,  Liu, Shengyi

    IPC分类号： H02P9/10 ,  H02P29/024 ,  H02K19/26 ,  H02K3/20

    摘要： A main field circuit of an electrical generator and associated system and method are disclosed. The main field circuit comprises a main field winding configured to conduct a main field current, and a counter-field winding arranged proximate to the main field winding. The main field circuit further comprises a switch element configured to selectively couple at least a portion of the main field current into the counter-field winding to reduce a magnitude of the main field current. Coupling at least a portion of the main field current into the counter-field winding may be performed responsive to one or predefined conditions, such as a predefined load fault condition and enabling a predefined field weakening operation.

    Windings for electrical machines
    6.
    发明公开
    Windings for electrical machines 审中-公开
    Winklungenfürelektrische Maschinen

    公开(公告)号：EP1633032A1

    公开(公告)日：2006-03-08

    申请号：EP05255305.4

    申请日：2005-08-30

    申请人： SWITCHED RELUCTANCE DRIVES LIMITED

    发明人： Randall, Steven Paul

    IPC分类号： H02K3/20

    CPC分类号： H02K3/20 ,  H02K19/103

    摘要： An electrical machine is provided with coils which are interconnected to form one or more windings. The coils are made up of at least two sub-coils, connected in series, the sub-coil closest to the airgap having strands in each turn which have a smaller cross sectional area than the strands in the turns in other sub-coils. This arrangement reduces the high-frequency loss in the windings while minimising any penalty associated with introducing stranding to the coil.

    摘要翻译： 电机设置有互连以形成一个或多个绕组的线圈。 线圈由串联连接的至少两个子线圈组成，最靠近气隙的子线圈在每一匝上具有线束，其横截面面积小于其他子线圈匝中的线股。 这种布置减少了绕组中的高频损耗，同时最小化与向线圈引入绞合相关联的任何惩罚。

    SWITCHED RELUCTANCE MACHINE HAVING UNBALANCE FORCES COMPENSATION COILS
    9.
    发明公开
    SWITCHED RELUCTANCE MACHINE HAVING UNBALANCE FORCES COMPENSATION COILS 失效
    开关磁阻结案带盘补偿不平衡力的

    公开(公告)号：EP0769133A4

    公开(公告)日：1997-12-29

    申请号：EP95905944

    申请日：1994-12-15

    申请人： SUNDSTRAND CORP

    发明人： MANSIR HASSAN

    IPC分类号： G01B7/14 ,  H02K3/20 ,  H02K19/10 ,  H02P25/08

    CPC分类号： G01B7/14 ,  H02K3/20 ,  H02K19/103

    摘要： A switched reluctance machine comprises a stator (48) having an even plurality of salient stator poles, each of which having a stator winding disposed thereon and electrically coupled one to another to form diametrically opposed pole pairs which may be coupled to an external source of electrical energy, a rotor (20) having an even plurality of salient rotor poles (22, 24, 26, 28), and at least one compensation (30, 32, 34, 36) disposed on each of the rotor poles. The compensation coils are electrically coupled one to another to form diametrically opposed compensation pairs (30 and 32, 34 and 36) in which flows a flux generating current when one of the stator windings of a pole pair is either open or shorted. The flux generated equalizes the unbalance forces resulting from the faulted stator winding, thereby increasing the fault tolerant capability of the switched reluctance machine.