发明授权
- 专利标题: Electric motor having a stator and a rotor
- 专利标题(中): 具有定子和转子的电动机
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申请号: US396803申请日: 1995-03-02
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公开(公告)号: US5714828A公开(公告)日: 1998-02-03
- 发明人: Bernd Ackermann , Jelm Franse , Ping-Shih Wang , Ekkehard Bolte , Anton Hammers , Klaus Stips
- 申请人: Bernd Ackermann , Jelm Franse , Ping-Shih Wang , Ekkehard Bolte , Anton Hammers , Klaus Stips
- 申请人地址: NY New York
- 专利权人: U.S. Philips Corporation
- 当前专利权人: U.S. Philips Corporation
- 当前专利权人地址: NY New York
- 优先权: DEX4407164.7 19940304; DEX4420371.3 19940610
- 主分类号: H02K1/12
- IPC分类号: H02K1/12 ; H02K3/00 ; H02K3/04 ; H02K3/26 ; H02K7/08 ; H02K21/14 ; H02K5/16 ; H02K21/22
摘要:
An improved spindle motor, particularly for a hard-disc drive, having a stator in the form of a cylindrical coil carried by a mounting plate and a permanent magnet rotor carried on a rotatable hub. At its outer circumference the rotor generates a field perpendicular to the axis of rotation. A bell-shaped portion of the hub surrounds the coil. The hub is supported on the motor shaft by axial and radial hydrodynamic bearings. A soft-iron sleeve-shaped yoke externally surrounds the coil configuration. This permits the coil to be free of soft-magnetic parts, thereby reducing its inductance and improving the dynamic drive characteristics of the motor. The coil is preferably formed by curved foil windings, so there are no winding slots. This avoids the production of detent torques.
公开/授权文献
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