公开(公告)号：EP0585452A4

公开(公告)日：1995-03-22

申请号：EP93909131

申请日：1993-03-16

申请人： AURA SYSTEMS INC

发明人： STUART KEITH O ,  BULGATZ DENNIS C

IPC分类号： B60G17/015 ,  H01F7/122 ,  H01F7/16 ,  H02K1/17 ,  H02K33/16 ,  H02K41/035 ,  H02K41/00 ,  B60G17/00

CPC分类号： B60G17/0157 ,  B60G2202/422 ,  B60G2400/102 ,  B60G2400/252 ,  B60G2600/26 ,  H01F7/1615 ,  H01F2007/1692 ,  H02K1/17 ,  H02K41/035 ,  H02K41/0352 ,  H02K41/0354 ,  H02K41/0356

摘要： An electromagnetic actuator (50) includes a magnetic flux conductive case (52), an electric coil (54), a magnetic flux conductive material core (56), and a pair of radially polarized magnetic flux developing elements (58, 60). A first region (80) of the core (56) traverses the coil (54) at one end and second region of the core (56) traverses the coil (54) at the other end. A first magnetic element (58) is carried by the first region (80) and a second magnetic element (60) is carried by the second region (82) so that magnetic flux across the coil between the first region (80) and the case (52) is in a first direction, and magnetic flux across the coil between the second region and the case (52) is in a second direction. The coil (54) is arranged so that an electrical current in the coil at one end flows in an opposite direction with respect to the direction of the current at the other end.

公开(公告)号：EP0616751A4

公开(公告)日：1995-05-17

申请号：EP92917496

申请日：1992-08-04

申请人： AURA SYSTEMS INC

发明人： STUART KEITH O ,  BULGATZ DENNIS C

IPC分类号： H02K15/03 ,  H02K33/18 ,  H04R9/02 ,  H04R9/04 ,  H04R9/06 ,  H04R31/00

CPC分类号： H04R9/045 ,  H02K15/03 ,  H02K33/18 ,  H04R9/025 ,  H04R31/00 ,  H04R2209/022 ,  H04R2209/024 ,  H04R2499/13

摘要： A voice coil actuator (50) includes a magnetic flux conductive material core (52, 52'), having a backplate (53) and a magnet (54), and an electrical current conductive coil (56, 56'). The core (52, 52') has a first surface (58, 58', 58'') and a continuous channel (60) disposed in said first surface (58, 58', 58''). The channel (60) has a pair of opposing walls (62, 64). The magnet (54) is disposed in intimate contact with a first one of said walls (62, 64) and spaced from a second one of said walls (62, 64) so that a gap remains between the magnet (54) and the second one of the walls (62, 64). The magnet (54) has a first face (94) of a first magnetic polarity facing the first one of the walls (62, 64) and a second face (96) of a second, opposite magnetic polarity facing the gap. The magnet (54) is further spaced from a bottom (76) of the channel (60) so that magnetic flux is substantially normal from the second face (96) across said gap to the second one of the walls (62, 64).

摘要翻译： 音圈致动器包括磁通导电材料芯，磁体和电流导电线圈。 芯具有设置在所述第一表面中的第一表面和连续通道。 通道有一对相对的墙壁。 磁体被设置成与所述壁中的第一个紧密接触并且与所述壁中的第二个间隔开，从而在磁体和第二个壁之间留有间隙。 磁体具有面向第一个壁的第一磁极性的第一面和面向间隙的第二相反磁极的第二面。 磁体与通道的底部进一步间隔开，使得磁通从穿过所述间隙的第二面基本上垂直于壁的第二面。 电流导电线圈可移动地设置在间隙中，使得线圈中的电流在基本上垂直于磁通量的方向上在线圈上产生磁力，以响应于所述磁力移位所述线圈。