公开(公告)号：US10910893B2

公开(公告)日：2021-02-02

申请号：US15750394

申请日：2016-06-24

Applicant: ABB Schweiz AG

Inventor： Jere Kolehmainen ,  Tero Kansakangas ,  Pietro Savio Termini

IPC: H02K1/24 ,  H02K17/16 ,  H02K19/14 ,  H02K1/27

Abstract: A rotor for a synchronous reluctance machine having an even number 2 p of poles circumferentially spaced at an angle α, with α=2 π/2 p, the rotor comprising a substantially cylindrical laminate stack having a plurality of magnetically conductive laminations. One or more of the magnetically conductive laminations includes non-magnetic flux barriers which are spaced from each other in the radial direction, one or more of the non-magnetic flux barriers having a first and second bridge transversally positioned in correspondence of their lateral ends and defining a first and a second air-gap with the outer rim of the magnetically conductive lamination, and further including a third and a fourth bridge transversally positioned and respectively defining together with the first and second bridge a first and a second internal space which are filled with an electrically conductive and non-magnetically conductive material.

公开(公告)号：US20190157925A1

公开(公告)日：2019-05-23

申请号：US16237924

申请日：2019-01-02

Applicant: ABB Schweiz AG

Inventor： Jere Kolehmainen ,  Jouni Ikäheimo ,  Kari Heikfolk ,  Tero Känsäkangas

IPC: H02K1/24 ,  H02K15/02

Abstract: The invention relates to a rotor for a synchronous reluctance electric machine. It includes a stack of consecutive magnetically conductive core elements; each core element includes at least two adjacent sectorial sections with flux barriers and a central area surrounding the rotational axis. A binding structure includes core end plates which form together with interconnection casts a unitary casted structure. The interconnection casts are casted into channels extending through the stack and which are located in an area defined by the flux barriers of the adjacent sectorial sections and the central area of each core element.

公开(公告)号：US20180316231A1

公开(公告)日：2018-11-01

申请号：US15770398

申请日：2016-09-14

Applicant: ABB Schweiz AG

Inventor： Jere Kolehmainen

IPC: H02K1/24

CPC classification number: H02K1/246

Abstract: A rotor for a rotating machine having a number n of poles pairs p that define corresponding direct pole axis (D-axis) and quadrature axis (Q-axis), and including a rotor core having a plurality of magnetically conductive laminations stacked in a rotor axial direction z. The magnetically conductive laminations include cut-out portions forming a plurality of flux barriers extending continuously with respect to the Q axis from a first rim portion to a second rim portion of the magnetically conductive laminations, the flux barriers being radially alternated by flux paths. The plurality of flux barriers form a corresponding plurality of cavities extending in the rotor core along the axial direction z, at least some of the plurality of cavities being filled with an electrically conductive and magnetically non-conductive material. The rotor further includes a plurality of channels spaced circumferentially and along the axial direction z, each of the channels transversally connecting two adjacent cavities of the plurality of cavities, at least some of the channels being filled with a non-magnetically conductive material.

公开(公告)号：US11362574B2

公开(公告)日：2022-06-14

申请号：US16471948

申请日：2016-12-21

Applicant: ABB Schweiz AG

Inventor： Pietro Savio Termini ,  Alessandro Castagnini ,  Giovanni Tartaglino ,  Michele Maggi ,  Jere Kolehmainen ,  Tero Kansakangas

IPC: H02K21/46 ,  H02K1/22 ,  H02K1/276 ,  H02K1/27

Abstract: A rotor for a synchronous reluctance machine includes a rotor core having a plurality of magnetically conductive laminations stacked in a rotor axial direction. The magnetically conductive laminations include cut-out portions forming a plurality of flux barriers radially alternated by flux paths portions, where at least one of the flux barriers includes a ridge connecting two flux paths portions adjacent to the at least one flux barrier. The at least one flux barrier has a first barrier mid-line, which is a line that is equidistant from both sides of the at least one flux barrier. The bridge has a second bridge mid-line, which is the line that is equidistant from both sides of the bridge. The first and second mid-lines intersect. The bridge has a first and second symmetry axis and is non-symmetrical with respect to at least one of the first and second symmetry axis.

公开(公告)号：US10686343B2

公开(公告)日：2020-06-16

申请号：US15771316

申请日：2016-07-01

Applicant: ABB Schweiz AG

Inventor： Jouni Ikäheimo ,  Tero Känsäkangas ,  Jere Kolehmainen

IPC: H02K1/28 ,  H02K1/24 ,  H02K1/08 ,  H02K15/02

Abstract: A stack of a rotor comprises a plurality of stack elements which include material of first magnetic conductance. The rotor includes sectorial sections distributed round a rotational axis of the rotor. Each of the stack elements has an aperture of second magnetic conductance in each of the sectorial sections. Outer ends of the apertures are located at a rim of the stack elements or at a bridge of the rim. The apertures form channels through the stack in a direction of a rotational axis of the rotor. At least two of the apertures of a common channel of the channels have the outer ends at different radial distances from the rotational axis of the rotor.

公开(公告)号：US10601267B2

公开(公告)日：2020-03-24

申请号：US16237924

申请日：2019-01-02

Applicant: ABB Schweiz AG

Inventor： Jere Kolehmainen ,  Jouni Ikäheimo ,  Kari Heikfolk ,  Tero Känsäkangas

IPC: H02K1/24 ,  H02K15/02 ,  H02K1/30

Abstract: The invention relates to a rotor for a synchronous reluctance electric machine. It includes a stack of consecutive magnetically conductive core elements; each core element includes at least two adjacent sectorial sections with flux barriers and a central area surrounding the rotational axis. A binding structure includes core end plates which form together with interconnection casts a unitary casted structure. The interconnection casts are casted into channels extending through the stack and which are located in an area defined by the flux barriers of the adjacent sectorial sections and the central area of each core element.

公开(公告)号：US10541574B2

公开(公告)日：2020-01-21

申请号：US15750389

申请日：2016-07-01

Applicant: ABB Schweiz AG

Inventor： Jere Kolehmainen ,  Tero Känsäkangas

IPC: H02K1/02 ,  H02K19/14 ,  H02K1/24 ,  H02K1/27 ,  B22D19/00

Abstract: A rotor for an electric machine, wherein the rotor comprises a plurality of stack elements and each of the stack elements includes material of first magnetic conductance. Each of the stack elements includes a plurality of sectorial sections distributed round a rotational axis of the rotor. Each of the sectorial sections includes one or more flux barriers. At least one of the one or more flux barriers has a difference associated with filing of an electrically conductive material of third magnetic conductance in different sectorial halves of a common sectorial section, the first magnetic conductance being larger than the third magnetic conductance.

公开(公告)号：US20180233971A1

公开(公告)日：2018-08-16

申请号：US15750389

申请日：2016-07-01

Applicant: ABB Schweiz AG

Inventor： Jere Kolehmainen ,  Tero Känsäkangas

IPC: H02K1/24 ,  H02K19/14

Abstract: A rotor for an electric machine, wherein the rotor comprises a plurality of stack elements and each of the stack elements includes material of first magnetic conductance. Each of the stack elements includes a plurality of sectorial sections distributed round a rotational axis of the rotor. Each of the sectorial sections includes one or more flux barriers. At least one of the one or more flux barriers has a difference associated with filing of an electrically conductive material of third magnetic conductance in different sectorial halves of a common sectorial section, the first magnetic conductance being larger than the third magnetic conductance.

公开(公告)号：US09941756B2

公开(公告)日：2018-04-10

申请号：US14737157

申请日：2015-06-11

Applicant: ABB Schweiz AG

Inventor： Jere Kolehmainen

IPC: F02K1/08 ,  H02K1/24 ,  H02K1/27 ,  H02K15/02

CPC classification number: H02K1/246 ,  H02K1/2766 ,  H02K15/022 ,  Y10T29/49012

Abstract: A rotor for an electric machine includes a rotor core having a plurality of rotor sheets (RS1), each of the plurality of rotor sheets including a plurality of flux guide sections, each of the plurality of flux guide sections having a plurality of flux paths and a plurality of flux barriers. The plurality of flux guide sections having a first flux guide section in which a first number of the plurality of flux barriers has a bridge interrupting the flux barrier, and a second flux guide section in which a second number of the plurality of flux barriers has a bridge interrupting the flux barrier. Each bridge is made of a material of high permeance, and the first number of the first flux guide section is different than the second number of the second flux guide section.

公开(公告)号：US10790715B2

公开(公告)日：2020-09-29

申请号：US16314717

申请日：2016-07-01

Applicant: ABB Schweiz AG

Inventor： Jere Kolehmainen ,  Jouni Ikäheimo ,  Tero Känsäkangas

IPC: H02K1/30 ,  H02K15/00 ,  H02K19/14

Abstract: An end structure for a rotor of an electric machine is attachable to an end of the rotor. The end structure includes a ring arrangement, a rotational axis of which is parallel to that of the stacked rotor, and at least one reinforcing structure at least partly within the ring arrangement. A value of a tensile strength of the at least one reinforcing structure is higher than that of the ring arrangement.