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US 2006/0232157 A1Published application
Structure of automotive alternator
AssigneeDenso Corporation
InventorTooru Ooiwa
Life of this patent
Estimating the term…
Abstract
An automotive alternator is provided which is designed to have enhanced cooling ability to cool a stator winding. The stator winding is made up of a plurality of U-shaped conductor segments wound through slots in a stator core. Each of the conductor segments is connected at one of ends thereof to the other end of one of the conductor segments through a joint. Some of the joints are each elongated from tips of connected two of the conductor segments in an axial direction of the stator core to have a longitudinal sectional area much greater than a transverse sectional area of the conductor segments and function as radiator fins to dissipate heat from the stator winding.
Claims24
An alternator for a vehicle comprising:
- a rotor;
- a stator disposed around said rotor, said stator including a stator core in which a plurality of slots are formed, the stator core having ends opposed to each other in an axial direction of said stator;
- and
- a stator winding wound through the slots of the stator core, said stator winding being made up of a plurality of conductor segments, each of the conductor segments including an in-slot portion disposed in one of the slots and an end portion extending from the in-slot portion outside one of the ends of the stator core, the end portions being broken down into at least a first and a second group, each of the end portions of the first group being connected to one of the end portions of the first group through a first joint, each of the end portions of the second group being connected to one of the end portions of the second group through a second joint, each of the first joints being elongated in the axial direction of the stator core to have a longitudinal sectional area which is 1.5 times or more greater than a transverse sectional area of the conductor segments.
1 more element
An alternator for a vehicle comprising:
- a rotor;
- a stator disposed around said rotor, said stator including a stator core in which a plurality of slots are formed, the stator core having ends opposed to each other in an axial direction of said stator;
- and
- a stator winding wound through the slots of the stator core, said stator winding being made up of a plurality of conductor segments, each of the conductor segments including an in-slot portion disposed in one of the slots and an end portion extending from the in-slot portion outside one of the ends of the stator core, the end portions being broken down into at least a first and a second group, each of the end portions of the first group being connected to one of the end portions of the first group through a first joint, each of the end portions of the second group being connected to one of the end portions of the second group through a second joint, each of the first joints being elongated in the axial direction of the stator core to have a circumferential length which is 1.5 times or more greater than that of a transverse sectional area of the conductor segments.
1 more element
An alternator for a vehicle comprising:
- a rotor;
- a stator disposed around said rotor, said stator including a stator core in which a plurality of slots are formed, the stator core having ends opposed to each other in an axial direction of said stator;
- and
- a stator winding wound through the slots of the stator core, said stator winding being made up of a plurality of conductor segments, each of the conductor segments including an in-slot portion disposed in one of the slots and an end portion extending from the in-slot portion outside one of the ends of the stator core, the end portions being broken down into at least a first and a second group, each of the end portions of the first group being connected to one of the end portions of the first group through a first joint, each of the end portions of the second group being connected to one of the end portions of the second group through a second joint, each of the first joints being elongated in the axial direction of the stator core to have a length which is 1.5 times or more greater than that of a transverse sectional area of the conductor segments.
1 more element
An alternator for a vehicle comprising:
- a rotor;
- a stator disposed around said rotor, said stator including a stator core in which a plurality of slots are formed, the stator core having ends opposed to each other in an axial direction of said stator;
- and
- a stator winding wound through the slots of the stator core, said stator winding being made up of a plurality of conductor segments, each of the conductor segments including an in-slot portion disposed in one of the slots and an end portion extending from the in-slot portion outside one of the ends of the stator core, the end portions being broken down into at least a first and a second group, each of the end portions of the first group being connected to one of the end portions of the first group through a first joint, each of the end portions of the second group being connected to one of the end portions of the second group through a second joint, each of the first joints being located at a predetermined interval away from a tip end of at least one of the end portions connected by the each of the first joints.
1 more element
An alternator for a vehicle comprising:
- a rotor;
- a stator disposed around said rotor, said stator including a stator core in which a plurality of slots are formed, the stator core having ends opposed to each other in an axial direction of said stator;
- a stator winding wound through the slots of the stator core, said stator winding being made up of a plurality of conductor segments, each of the conductor segments including an in-slot portion disposed in one of the slots and an end portion extending from the in-slot portion outside one of the ends of the stator core, the end portions being broken down into at least a first and a second group;
- and
- discrete joining members each of which joins two of the first group of the end portions, each of said joining members including a protrusion working as a radiator fin to dissipate thermal energy from the conductor segments.
2 more elements
An alternator for a vehicle comprising:
- a rotor;
- a stator disposed around said rotor, said stator including a stator core in which a plurality of slots are formed, the stator core having ends opposed to each other in an axial direction of said stator;
- and
- a stator winding wound through the slots of the stator core, said stator winding being made up of a plurality of conductor segments, each of the conductor segments including an in-slot portion disposed in one of the slots and an end portion extending from the in-slot portion outside one of the ends of the stator core, each of the end portions including a slant portion and a tip portion, each of the slant portions extending from a corresponding one of the in-slot portions and being oriented both in a circumferential direction and in an axial direction of the stator core, each of the tip portions extending from a corresponding one of the slant portions in the axial direction of the stator core, each of the tip portions having a length made up of a first, a second, and a third section, the first section of each of the tip portions facing substantially parallel to the first section of one of the tip portions and extending over a first distance L1 from the slant portion, the second section of each of the tip portions forming a joint to the second section of one of the tip portions and extending over a second distance L2, the third section of at least one of two of the tip portions connected through one of the joints extending over a third distance L3 from the second section, the first, second, and third distances L1, L2, and L3 meeting a relation of L3>L1+L2.
1 more element
Dependencies are inferred from the claim text.