Rotor for electric machine, and manufacturing method of rotor
AssigneeABB Schweiz AG
InventorsJere Kolehmainen, Tero Känsäkangas
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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.
Claims10
A rotor for an electric machine, wherein the rotor comprises a plurality of stack elements and each of the stack elements comprises material of first magnetic conductance;
- each of the stack elements comprises a plurality of sectorial sections distributed round a rotational axis of the rotor;
- each of the sectorial sections comprises one or more flux barriers;
- and
- at least one of said one or more flux barriers has a difference associated with filling of an electrically conductive material of a third magnetic conductance in different sectorial halves of a common sectorial section, a numeric value of the first magnetic conductance being larger than that of the third magnetic conductance;
- wherein the fillings of the flux barriers in two directly adjacent stack elements are configured to be distributed non-identically.
A method of manufacturing a rotor of an electric machine, the method comprising:
- forming, in each stack element comprising material of first magnetic conductance, sectorial sections round a rotational axis of the stack element;
- piling the stack elements together;
- and
- forming, in each of the sectorial sections of at least one of the stack elements, at least one flux barrier which has a difference associated with filling of an electrically conductive material of a third magnetic conductance in different sectorial halves of a common sectorial section, a numeric value of the first magnetic conductance being larger than that of the third magnetic conductance;
- wherein the fillings of the flux barriers in two directly adjacent stack elements are configured to be distributed non-identically.
Dependencies are inferred from the claim text.