Method of manufacturing a rotary electric machine and a rotary electric machine
AssigneeABB AB
InventorChrister Soderberg
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Abstract
The invention relates to a process for producing a rotating electric DC machine, where the main pole of the machine and the slots formed in it for the compensating winding are formed or placed in such a way that the slots are moved radially outward from the center of the stator to provide for an optimal increase in rotor diameter. In accordance with the invention, space is provided for the compensating winding to leave the slots in the main pole by making coil ends (4A) on the main coil (4) of the respective main pole tapered in the radially outward direction. In another alternative or complementary embodiment of the invention, additional space is created for the compensating winding where it leaves the slots by angling the coil ends (4A′) of the main coil radially outward.
Claims34
A process for producing a rotating electric DC machine having a central axis, a stator and a rotor rotatably mounted in the stator, the stator having a number of main poles with respective main coils having long sides and axial coil ends, the main poles having slots parallel to the central axis, and a compensating winding disposed in the slots comprising the steps of:
- radially shifting the slots, outward so that at least parts of said slots are arranged radially outside radially inner parts of the long sides of the respective main coil, and
- forming the axial coil ends of the main coils with at least one of an outwardly tapered cross section and radially outwardly bent ends in the direction away from the central axis of the stator.
A rotating electric DC machine having a central axis and a rotor rotatably mounted in a stator, and wherein the stator has a number of main poles with respective main coils, whereby the main poles have slots parallel to the central axis and a compensating winding arranged in the slots, said compensating winding being shifted radially outward, so that at least portions thereof, and the compensating winding placed therein are arranged radially outside radially inner of the long sides of the respective main coils, wherein the axial coil ends have an outwardly tapering cross section, so that the axial coil ends have at least one of an extended shape that is at least one of radially thinner than that of other portions of the coil, and radially outwardly bents ends in the direction away from the center of stator.
A process for producing a stator for a rotating electric DC motor having a central axis, whereby the stator is equipped with a number of main poles with respective main coils and the main poles are provided with slots, axially arranged with respect to the central axis of the machine, and a compensating winding for the slots, and the slots being radially shifted outward so that at least parts of the slots are arranged radially outside radially inner portions of the long sides of the respective main coil, wherein the axial coil ends of main coils are formed with an outwardly tapered cross section, whereby the coil ends have an extended shape that is at least one of radially thinner than other portions of the coil and the axial coil ends of main coils are bent radially outward in the direction away from the center of stator.
A stator for a rotating electric DC machine having a central axis with a number of main poles with respective main coils, the main poles being equipped with axial slots and with a compensating winding arranged in the slots, slots being shifted radially outward, so that at least parts thereof and compensating winding placed in them are arranged radially outside radially inner parts of the long sides of the respective main coils, wherein the axial coil ends of main coils have an outwardly tapering cross section, so that the coil ends are made with at least one of an extended shape that is radially thinner than other parts of the coil and the axial ends of main coils are bent radially outward in the direction away from the center of stator.
Dependencies are inferred from the claim text.