公开(公告)号：US5394043A

公开(公告)日：1995-02-28

申请号：US84569

申请日：1993-06-29

Applicant: Song-Ling Hsia

Inventor： Song-Ling Hsia

IPC: H02K3/44 ,  H02K5/173 ,  H02K21/14 ,  H02K29/08 ,  H02K7/08

CPC classification number: H02K21/14 ,  H02K29/08 ,  H02K3/44 ,  H02K5/173 ,  Y10S310/06

Abstract: A brushless d.c. motor comprising a housing, an annular stator coil structure with the housing, a rotor concentric with the stator and comprising a body having an output shaft portion extending from one end thereof toward the forward end of the housing for connection to a mechanical load for driving the same and a permanent magnet arrangement on the periphery of the rotor body operatively associated with the stator coil structure, a first bearing near the forward end of the housing for rotatably supporting the shaft portion of the rotor and wherein there is provided a second bearing axially inwardly of the rear end of the rotor for rotatably supporting that end of the rotor and a circuit board located between the rear end of the rotor and the rear end of the housing. By virtue of the location of the second bearing a rigid and vibration free structure is provided for operation of the motor at high speed. By virtue of the location of the second bearing and the circuit board potting material can encapsulate the stator coil structure and circuit board thereby completely sealing all electrical sections of the motor so that they can withstand autoclave sterilization conditions. A fluid passage arrangement equalizes pressure applied to the first and second bearings so that they can withstand autoclave sterilization conditions.

Abstract translation: 无刷直流 电动机，包括壳体，具有壳体的环形定子线圈结构，与定子同心的转子，包括具有从其一端向壳体的前端延伸的输出轴部分的主体，用于连接到用于驱动 相同的永磁体设置在与定子线圈结构可操作地相关联的转子体的周边上，靠近壳体前端的第一轴承，用于可旋转地支撑转子的轴部分，并且其中设置有轴向向内的第二轴承 转子的后端可旋转地支撑转子的这一端，以及位于转子的后端和壳体的后端之间的电路板。 通过第二轴承的位置，提供刚性和无振动的结构用于高速运转电动机。 由于第二轴承的位置和电路板灌封材料可以封装定子线圈结构和电路板，从而完全密封电机的所有电气部分，从而可以承受高压灭菌器的灭菌条件。 流体通道布置使施加到第一和第二轴承的压力平衡，使得它们能够经受高压灭菌条件。