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公开(公告)号：US20230027862A1
公开(公告)日：2023-01-26
申请号：US17381649
申请日：2021-07-21
Applicant: ABB Schweiz AG
Inventor： William E. Martin , Robert F. McElveen, JR. , Nicolas W. Frank
IPC: H02K1/27
Abstract: An electric machine includes a stator defining a rotor chamber. A rotor is disposed within the chamber and is configured to rotate about a central axis. The rotor includes a plurality of stacked laminations to form a rotor core. The rotor core has an outer diameter and each of the laminations includes a plurality of magnet slots that are radially spaced apart from the outer diameter and angled inwardly with one end of each magnet slot adjacent to the outer diameter. Each magnet slot has a permanent magnet disposed therein, adjacent pairs of the ferrite permanent magnets defining poles for the rotor. Each magnet slot has two opposite ends that define inner and outer magnet free areas. The outer magnet free areas are adjacent the rotor outer diameter and the inner magnet free areas are radially inwardly positioned. Each outer magnet free area is provided with conductive material.
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公开(公告)号：US11742734B2
公开(公告)日：2023-08-29
申请号：US17378932
申请日：2021-07-19
Applicant: ABB Schweiz AG
Inventor： William E. Martin , Robert F. McElveen, Jr. , Nicolas W. Frank
CPC classification number: H02K21/16 , H02K1/27 , H02K21/04 , H02K17/16 , H02K17/165 , H02K21/46 , H02K1/276
Abstract: An electric machine includes a stator and a rotor. The rotor includes stacked laminations forming a rotor core. The rotor rotates relative to the stator about a central axis. The rotor core has an outer diameter. Each lamination includes a plurality of magnet slots. Each magnet slot includes a ferrite permanent magnet located therein, adjacent pairs of the ferrite permanent magnets defining a number of poles. Each of the laminations includes a plurality of non-circular rotor bar apertures spaced about the central axis of the rotor and disposed adjacent to and radially inward of the rotor outer diameter. A non-cylindrical rotor bar is disposed in each respective of the plurality of rotor bar apertures. The rotor bars are formed of a conductive material, wherein at least some of the plurality of rotor bars collectively form a rotor bar cage.
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公开(公告)号：US12126219B2
公开(公告)日：2024-10-22
申请号：US17381649
申请日：2021-07-21
Applicant: ABB Schweiz AG
Inventor： William E. Martin , Robert F. McElveen, Jr. , Nicolas W. Frank
CPC classification number: H02K1/276
Abstract: An electric machine includes a stator defining a rotor chamber. A rotor is disposed within the chamber and is configured to rotate about a central axis. The rotor includes a plurality of stacked laminations to form a rotor core. The rotor core has an outer diameter and each of the laminations includes a plurality of magnet slots that are radially spaced apart from the outer diameter and angled inwardly with one end of each magnet slot adjacent to the outer diameter. Each magnet slot has a permanent magnet disposed therein, adjacent pairs of the ferrite permanent magnets defining poles for the rotor. Each magnet slot has two opposite ends that define inner and outer magnet free areas. The outer magnet free areas are adjacent the rotor outer diameter and the inner magnet free areas are radially inwardly positioned. Each outer magnet free area is provided with conductive material.
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公开(公告)号：US20230018320A1
公开(公告)日：2023-01-19
申请号：US17378932
申请日：2021-07-19
Applicant: ABB Schweiz AG
Inventor： William E. Martin , Robert F. McElveen, JR. , Nicolas W. Frank
Abstract: An electric machine includes a stator and a rotor. The rotor includes stacked laminations forming a rotor core. The rotor rotates relative to the stator about a central axis. The rotor core has an outer diameter. Each lamination includes a plurality of magnet slots. Each magnet slot includes a ferrite permanent magnet located therein, adjacent pairs of the ferrite permanent magnets defining a number of poles. Each of the laminations includes a plurality of non-circular rotor bar apertures spaced about the central axis of the rotor and disposed adjacent to and radially inward of the rotor outer diameter. A non-cylindrical rotor bar is disposed in each respective of the plurality of rotor bar apertures. The rotor bars are formed of a conductive material, wherein at least some of the plurality of rotor bars collectively form a rotor bar cage.
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