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US 8,912,694 B2Granted
Rotating electrical machine
AssigneeKabushiki Kaisha Yaskawa Denki
InventorsKazuo Miura, Yuuto Fukuma, Mitsunori Nagao
Life of this patent
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Abstract
A rotating electrical machine according to an embodiment includes a rotor rotatable around a rotation axis, a stator arranged to face the rotor, and a frame which accommodates the rotor and the stator and in which a refrigerant flow path is formed in a sidewall. The frame includes a through hole that penetrates from the refrigerant flow path to an outer periphery of the sidewall and is covered by a lid member.
Claims8
A rotating electrical machine comprising:
- a rotor rotatable around a rotation axis;
- a stator arranged to face the rotor;
- and
- a frame which accommodates the rotor and the stator, the frame comprising:
- a sidewall that surrounds an outer circumference of the rotor and the stator;
- a projecting portion in which an inlet and an outlet for a refrigerant are formed and which is provided on one end portion of the side wall in a rotation axis direction to project from the sidewall;
- a refrigerant flow path that is formed in the sidewall, the refrigerant flow path comprising:
- first flow paths that extend in directions parallel to the rotation axis of the rotor;
- and
- second flow paths that connect one ends of the adjacent first flow paths, the second flow paths extending in a circumferential direction about the rotation axis;
- and
- through holes that are formed on one other end portion of the sidewall in the rotation axis direction to align at a predetermined pitch over a whole circumference of the sidewall to penetrate from the respective second flow paths to an outer periphery of the sidewall and that are covered by respective lid members,
- wherein the refrigerant flow path has a serpentine flow path that is formed by the first and second flow paths,
- wherein the one end portion of the sidewalls is opposite to the one other end portion of the sidewall in the rotation axis direction, and
- wherein the inlet and outlet of the projecting portion are arranged in the circumferential direction.
12 more elements
A rotating electrical machine comprising:
- a rotor rotatable around a rotation axis;
- a stator arranged to face the rotor;
- accommodation means for accommodating the rotor and the stator, the accommodation means comprising:
- a sidewall that surrounds an outer circumference of the rotor and the stator;
- a projecting portion in which an inlet and an outlet for a refrigerant are formed and which is provided on one end portion of the side wall in a rotation axis direction to project from the sidewall;
- refrigerant means for cooling the stator in the sidewall, the refrigerant flow path means comprising:
- first flow paths that extend in directions parallel to the rotation axis of the rotor;
- and
- second flow paths that connect one ends of the adjacent first flow paths, the second flow paths extending in a circumferential direction about the rotation axis;
- and
- through holes that are formed on one other end portion of the sidewall in the rotation axis direction to align at a predetermined pitch over a whole circumference of the sidewall to penetrate from the respective second flow paths to an outer periphery of the sidewall and that are covered by respective lid members,
- wherein the refrigerant means has a serpentine flow path that is formed by the first and second flow paths,
- wherein the one end portion of the sidewalls is opposite to the one other end portion of the sidewall in the rotation axis direction, and
- wherein the inlet and outlet of the projection portion are arranged in the circumferential direction.
11 more elements
Dependencies are inferred from the claim text.