| 摘要 |
An electric motor has a stator in which an armature is disposed. The armature has a lamination stack having slots in which magnet wires are wound. An armature shaft extends coaxially through the lamination stack and a commutator is disposed on the armature shaft to which ends of the magnet wires are electrically coupled. An insulative sleeve is disposed on the armature shaft between the lamination stack and the armature shaft and between the commutator and the armature shaft. The magnet wires are at least partially encased in thermally conductive plastic. In an aspect, an electrically insulative seal is disposed around the insulative sleeve and abutting the commutator to seal any gap between an end of the insulative sleeve and the commutator. In an aspect, a power tool is made with such an electric motor.
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