Rotary electric machine with liquid coolant
AssigneeHonda Motor Co., Ltd.
InventorNorifumi Yasuda
Life of this patent
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Abstract
A rotary electric machine includes a rotor that rotates integrally with a rotary shaft and a stator disposed outside the rotor in a radial direction. In the stator, a coil is wound on a stator core, and a coil end of the coil exposed to an outside from an end portion of the stator core is cooled by a liquid coolant. The rotary electric machine further includes a coil end cover formed of an insulating material and configured to cover at least an outer circumference of an upper region of the coil end. A liquid coolant passage through which a liquid coolant flows toward a coil end is provided in the coil end cover.
Claims5
A rotary electric machine comprising:
- a rotor that rotates integrally with a rotary shaft;
- and
- a stator disposed outside the rotor in a radial direction,
- a stator core of the stator is wound by a coil and a coil end of the coil exposed to an outside from an end portion of the stator core is cooled by a liquid coolant, and
- wherein a coil end cover formed of an insulating material and configured to cover at least an outer circumference of an upper region of the coil end is further provided, and
- a liquid coolant passage through which a liquid coolant flows toward the coil end is provided in the coil end cover,
- the coil end cover comprises a first coil end cover configured to cover the coil end of one end side of the stator in an axial direction and a second coil end cover configured to cover the coil end of the other end side of the stator in the axial direction,
- the liquid coolant passage of the first coil end cover and the liquid coolant passage of the second coil end cover are connected with each other by a liquid coolant pipe configured to supply the liquid coolant to the liquid coolant passages of the first coil end cover and the second coil end cover,
- a liquid coolant discharge hole configured to discharge the liquid coolant to the stator core is formed in the liquid coolant pipe, and
- the liquid coolant discharge hole is formed in a halfway section of the liquid coolant pipe that faces an upper surface of the stator core.
Dependencies are inferred from the claim text.