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US 6,555,938 B2Granted
Stator for a commutator motor
AssigneeHitachi Koki Co., Ltd.
InventorTomoyoshi Yokota
Life of this patent
Estimating the term…
Abstract
In a stator for a commutator motor, at least one of coil end portions 2a wound in a slot of a stator core 1 and protruding in a bundle from opposite end portions of the stator core 1 is divided into at least two portions along a radial direction. A space 5 is provided between the divisions of the coil end portion 2a so that cooling air passes through the space 5.
Claims6
A stator for a commutator motor, comprising:
- a stator core;
- and
- a stator coil wound in a slot of said stator core and having coil end portions protruding in a bundle from opposite end portions of said stator core;
- wherein at least one of said coil end portions protruding from said stator core is comprised of a first bundle of coil end portions and, a second bundle of coil end portions, said first bundle of coil end portions being radially spaced from said second bundle of coil end portions;
- and
- wherein a space is defined in a radial direction between said first and second bundle of coil end portions so that cooling air passes through said space.
3 more elements
A stator for a commutator motor comprising:
- a stator core:
- and
- a stator coil wound in a slot of said stator core and having coil end portions protruding in a bundle from opposite end portions of said stator core;
- wherein at least one of said coil end portions protruding from said stator core is comprised of a first bundle of coil end portions and a second bundle of coil end portions, said first bundle of coil end portions being spaced 2-3 mm in a radial direction from said second bundle of coil end portions, and
- wherein a space is defined in the radial direction between said first and second bundle of coil end portions so that cooling air passes through said space.
2 more elements
A stator for a commutator motor, comprising:
- a stator core;
- and
- two stator coils each wound in a slot of said stator core and having coil end portions protruding in a bundle from opposite end portions of said stator core,
- wherein each of said coil end portions of each of said two stator coils protruding from said stator core is comprised of a first bundle of coil end portions and a second bundle of coil end portions, said first bundle of coil end portions being radially spaced form said second bundle of coil end portions, and
- wherein a space is defined in a radial direction between said first and second bundle of coil end portions so that cooling air passes through said space.
2 more elements
Dependencies are inferred from the claim text.