Abb Schweiz Ag

Abb Oy

Abb Technology Ag

Jere Kolehmainen

Jouni Ikäheimo

Tero Känsäkangas

Jari Pekola

Pietro Savio Termini

Alessandro Castagnini

Tommi Ryyppö

Michele Maggi

Giovanni Tartaglino

Kari Heikfolk

Jouni IKÄHEIMO

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.

Rotor for rotating electric machines having flux barriers arranged among bridges

A rotor for a synchronous reluctance machine having an even number 2 p of poles circumferentially spaced at an angle &#x3b1;, with &#x3b1;=2 &#x3c0;/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.

Rotor for rotating electric machine

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.

End structure of rotor of electric machine and manufacturing method thereof

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.

Rotor of electric machine and manufacturing method thereof

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.

Rotor for rotating electric machines

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.

Rotor for a synchronous reluctance electric machine, an electric machine, and a manufacturing method of a rotor

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.

Rotor for electric machine, and manufacturing method of rotor

A rotor for an electric machine includes a rotor core having a plurality of rotor sheets (RS), 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.

Rotor for an electric machine, an electric machine and method for manufacturing an electric machine

The present disclosure relates to rotating electric machines which may be used for industrial applications, to a method for manufacturing a rotor of a synchronous reluctance motor, a rotor of a synchronous reluctance motor, and a synchronous reluctance motor. A rotor of a synchronous reluctance motor according to the present disclosure has a cylindrical rotor body part casted from a superparamagnetic material, and ferromagnetic flux guides arranged inside the casted cylindrical rotor body part. The flux guides are arranged to go through from one side of the outer circumference of the cylindrical rotor part to the other side of the outer circumference of the cylindrical rotor part in the direction of the direct axis of the synchronous reluctance motor.

Method for manufacturing a rotor of a synchronous reluctance motor, a rotor of a synchronous reluctance motor, and a synchronous reluctance motor

A rotor as disclosed for an electric machine which includes a rotor core having a plurality of rotor sheets stacked in an axial direction, each of the plurality of rotor sheets having a plurality of flux paths made of a material of high permeance, a plurality of flux barriers made of a material of low permeance, a plurality of bridges made of a material of high permeance, each of the plurality of bridges extending across a corresponding flux barrier, and at least one axial magnet located axially adjacent a corresponding bridge and configured to saturate the corresponding bridge, each axial magnet being axially pressed between two elements at least one of which is a bridge corresponding to the axial magnet.

Rotor for an electric machine and electric machine including the same

A rotor is disclosed for a synchronous reluctance machine which includes an axis, which is supported by bearings to rotate inside a stator, and to which axis a rotor frame has been attached. The frame can be made of magnetically non-conductive material, having arranged magnetically conductive bar-shaped objects which extend through the rotor frame from the outer surface of the magnetic pole of the rotor to the outer surface of the pole. The whole length of each bar-shaped object inside the rotor frame can be surrounded by non-magnetic material.

Rotor of a synchronous reluctance machine and the method for manufacturing the rotor of a synchronous reluctance machine

A rotor disk for an electric motor including a shaft hole for receiving a shaft of the electric motor, a set of positioning holes around the shaft hole, each configured to receive a positioning pin. The shaft hole and the set of positioning holes are positioned in the rotor disk such that when the rotor disk is set to a rotated position with respect to another similar rotor disk, and the shaft and the positioning pins are penetrated to the respective holes of the two rotor disks, the disks cause a pressing force to the shaft.

Rotor disk and assembly method

A cooling arrangement is disclosed for an electrical machine in which the main cooling air circulation within the machine is arranged using a centrifugal blower in at least one of the ends of the machine, making the main cooling air circulation flow through at least an air space in the machine and the outer surface of the stator. A circulating fan is arranged in the immediate vicinity of the centrifugal fan for the purpose of generating a coil end circulation that circulates air at least in the area of the machine's coil ends.

Cooling arrangement for an electrical machine

The object of the invention is a rotor for an electrical machine excited by permanent magnets, said rotor comprising a substantially cylindrical magnetic body of the rotor fitted onto the shaft of the electrical machine and a set of permanent magnets used to create a first and a second pole alternately in the circumferential direction, excited in opposite directions. The permanent magnets are fitted into openings arranged within the rotor. The rotor comprises a body part with several segments extending to the outer circumference in the circumferential direction and an outward tapered section remaining between the segments in the radial direction of the rotor. Permanent-magnet pieces are arranged between each section and segment.

Rotor for a permanent-magnet electrical machine

Electric machine rotor comprising: an inner rotor element and an outer rotor element positioned more outwards in the radial direction than the inner rotor element, the inner rotor element and the outer rotor element being made of a material of high permeance, and an air gap of low permeance between the inner rotor element and the outer rotor element. The outer rotor element forms a shape-mating pair with the inner rotor element, the inner rotor element and the outer rotor element being shaped in such a way that radial detachment of the outer rotor element from the inner rotor element is prevented.

Growing community of inventors

Vaasa, Finland

Jere Kolehmainen