Coil end cooling structure and manufacturing method of a stator
AssigneeSubaru Corporation
InventorKimihiro NAGASE
Life of this patent
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Abstract
A coil end cooling structure includes an insulator, and first and second covers. The insulator has first and second protrusions provided on respective end surfaces of a stator core of a stator in the axial direction, and a link to link the protrusions. The first and second covers are secured to the insulator and cover the coil end on the respective end surfaces of the stator. The link is provided along an inner wall of the slot. The first and second covers are provided with a supply port and a discharge port for a coolant that cools a stator coil provided in a slot of the stator core. The supply port is provided on a lower side in a direction of gravity, and the discharge port is provided on an upper side in the direction of gravity.
Claims5
A coil end cooling structure configured to cool a stator including a cylindrical stator core and a stator coil provided in a slot of the stator core and having a coil end protruding from an end surface in an axial direction of the stator core, the coil end cooling structure comprising:
- an insulator including a first protrusion provided on one end surface of the stator core in the axial direction, a second protrusion provided on the other end surface, and a link configured to link the first protrusion and the second protrusion;
- and
- a first cover secured to the insulator and configured to cover the coil end on the one end surface of the stator, and a second cover configured to cover the coil end on the other end surface of the stator,
- wherein the link of the insulator is provided along an inner wall of the slot,
- wherein the first cover and the second cover are provided with a supply port for a coolant to cool the stator coil and a discharge port for the coolant, and
- wherein the supply port is provided on a lower side in a direction of gravity, and the discharge port is provided on an upper side in the direction of gravity.
A manufacturing method of a stator, comprising:
- forming an insulator including a first protrusion provided on one end surface in an axial direction of a cylindrical stator core provided with slots, a second protrusion provided on the other end surface of the stator core, and a link provided along an inner wall of the slots and configured to link the first protrusion and the second protrusion;
- inserting segment coils into the slots of the stator core;
- twisting the segment coils along curved surfaces provided on the first protrusion and the second protrusion of the insulator to form a stator coil;
- securing the stator coil to the insulator;
- and
- securing a first cover to the first protrusion, the first cover configured to cover a coil end of the stator coil protruding from the stator core and the insulator on the one end surface of the stator core, and securing a second cover to the second protrusion, the second cover configured to cover a coil end of the stator coil protruding from the stator core and the insulator on the other end surface of the stator core.
Dependencies are inferred from the claim text.