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US 12,671,290 B2Granted
Motor
AssigneeDenso Corporation
InventorsYusuke Tateishi, Toshio Yamamoto, Yuji Hayashi
Life of this patent
Estimating the term…
Abstract
A motor includes a stator having a stator core. The stator includes a coil connection body of one phase having a plurality of coils connected with each other; at least one of the coils has an electrical resistance set to be different from an electrical resistance of another of the coils. The stator also includes a coil connection body of another phase having a plurality of coils connected with each other; at least one of the coils has an electrical resistance set to be different from an electrical resistance of another of the coils. Moreover, the coil connection body of the another phase has a combined resistance set to be equal to a combined resistance of the coil connection body of the one phase.
Claims14
A motor comprising:
- a rotating body having magnets and rotatably supported;
- a core formed in a ring shape and arranged coaxially with the rotating body;
- a coil connection body of one phase having a plurality of coils connected with each other, each of the plurality of coils being formed by winding an electrically conductive winding into a ring shape, at least one of the plurality of coils having an electrical resistance set to be different from an electrical resistance of another of the plurality of coils, the plurality of coils being opposed to the magnets and arranged along the core;
- and
- a coil connection body of another phase having a plurality of coils connected with each other, each of the plurality of coils being formed by winding an electrically conductive winding into a ring shape, at least one of the plurality of coils having an electrical resistance set to be different from an electrical resistance of another of the plurality of coils, the plurality of coils being opposed to the magnets and arranged along the core, wherein the coil connection body of the another phase has a combined resistance set to be equal to a combined resistance of the coil connection body of the one phase, wherein:
- each of the coils has
- opposing parts in each of which layers of the winding are arranged side by side in a circumferential direction and which are radially opposed to axial centers of the magnets, and
- coil end parts formed respectively on one side and the other side of the opposing parts in an axial direction;
- and
- the coil end parts of one of the coils and the coil end parts of another of the coils whose electrical resistance is different from the electrical resistance of the one of the coils are arranged to overlap each other.
7 more elements
A motor comprising:
- a rotating body having magnets and rotatably supported;
- a core formed in a ring shape and arranged coaxially with the rotating body;
- a coil connection body of one phase having a plurality of coils connected with each other, each of the plurality of coils being formed by winding an electrically conductive winding into a ring shape, at least one of the plurality of coils having an electrical resistance set to be different from an electrical resistance of another of the plurality of coils, the plurality of coils being opposed to the magnets and arranged along the core;
- and
- a coil connection body of another phase having a plurality of coils connected with each other, each of the plurality of coils being formed by winding an electrically conductive winding into a ring shape, at least one of the plurality of coils having an electrical resistance set to be different from an electrical resistance of another of the plurality of coils, the plurality of coils being opposed to the magnets and arranged along the core, wherein the coil connection body of the another phase has a combined resistance set to be equal to a combined resistance of the coil connection body of the one phase, wherein:
- the core has inter-coil parts each of which is arranged between one of the coils and another of the coils;
- and
- the inter-coil parts are formed of a magnetic material satisfying the following relationship or formed of a nonmagnetic material,
- Wt×Bs≤Wm×Br
- where Wt is a circumferential width of each of the inter-coil parts, Bs is a saturation flux density of the inter-coil parts, Wm is a circumferential width of the magnets corresponding to one magnetic pole, and Br is a residual flux density of a magnetic compound of which the magnets are formed.
7 more elements
A motor comprising:
- a rotating body having magnets and rotatably supported;
- a core formed in a ring shape and arranged coaxially with the rotating body;
- a first connection body having a plurality of coil connection bodies connected with each other, each of the plurality of coil connection bodies having a plurality of coils connected with each other, each of the plurality of coils being formed by winding an electrically conductive winding into a ring shape, the plurality of coils being opposed to the magnets and arranged along the core;
- and
- a second connection body having a plurality of coil connection bodies connected with each other, each of the plurality of coil connection bodies having a plurality of coils connected with each other, each of the plurality of coils being formed by winding an electrically conductive winding into a ring shape, the plurality of coils being opposed to the magnets and arranged along the core,
- wherein:
- a combined resistance R1 of one of the plurality of coil connection bodies constituting the first connection body is lower than a combined resistance R2 of another of the plurality of coil connection bodies constituting the first connection body;
- a combined resistance R3 of one of the plurality of coil connection bodies constituting the second connection body is higher than a combined resistance R4 of another of the plurality of coil connection bodies constituting the second connection body;
- and
- R1:R2=R4:R3.
7 more elements
Dependencies are inferred from the claim text.