公开(公告)号：US10658890B2

公开(公告)日：2020-05-19

申请号：US15770398

申请日：2016-09-14

Applicant: ABB Schweiz AG

Inventor： Jere Kolehmainen

IPC: H02K1/24

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：US20190319522A1

公开(公告)日：2019-10-17

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

Abstract: A rotor for a synchronous reluctance machine including 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, at least one of the flux barriers including a bridge 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 the line that is equidistant from both sides of the at least one flux barrier, and 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 intersecting at an intersection point. The bridge has a first symmetry axis and a second symmetry axis and is non-symmetrical with respect to at least one of the first and second symmetry axis. The first symmetry axis is defined as the straight line tangential to the first, barrier, mid-line and passing through the intersection point, and the second symmetry axis is defined as the straight line orthogonal to the first symmetry axis and passing through the intersection point.

公开(公告)号：US20180226848A1

公开(公告)日：2018-08-09

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 ,  H02K19/14

CPC classification number: H02K1/246 ,  H02K1/276 ,  H02K19/14 ,  H02K2213/03

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.