US 12,463,497 B2
Rotating electrical machine
Tadahiro Matsumoto, Tokyo (JP); and Mototsugu Omura, Tokyo (JP)
Assigned to MEIDENSHA CORPORATION, Tokyo (JP)
Appl. No. 18/711,525
Filed by MEIDENSHA CORPORATION, Tokyo (JP)
PCT Filed Aug. 23, 2022, PCT No. PCT/JP2022/031735
§ 371(c)(1), (2) Date Jun. 14, 2024,
PCT Pub. No. WO2023/089893, PCT Pub. Date May 25, 2023.
Claims priority of application No. 2021-188334 (JP), filed on Nov. 19, 2021.
Prior Publication US 2025/0023418 A1, Jan. 16, 2025
Int. Cl. H02K 5/20 (2006.01); H02K 9/04 (2006.01)
CPC H02K 5/207 (2021.01) [H02K 9/04 (2013.01); H02K 5/20 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A rotating electrical machine comprising:
a stator formed in a cylindrical shape;
a rotor disposed concentrically on an inner circumferential side of the stator with a gap; and
a housing that accommodates the stator and the rotor and forms a first space communicating with the gap on a one end-side of the stator and a second space communicating with the gap on another end-side of the stator,
wherein the stator has an intermediate duct communicating with the gap from an outer circumference of the stator at an intermediate portion in an axial direction, and the housing has:
a one end-side intake port that cooling air from a blower is taken into the first space;
a one end-side exhaust port that exhausts air from the first space;
an another end-side intake port that cooling air from a blower is taken into the second space;
an another end-side exhaust port that exhausts air from the second space; and
an air intake port that communicates with the intermediate duct and takes in air from an outside of the housing, and
the rotating electrical machine further comprises:
a one end-side throttle mechanism configured to suppress a flow of cooling air from the one end-side intake port to the first space more than a flow on the one end-side exhaust port and adjust an internal pressure of the first space to a negative pressure lower than atmospheric pressure; and
an another end-side throttle mechanism configured to suppress a flow of cooling air from the another end-side intake port to the second space more than a flow on the another end-side exhaust port and adjust an internal pressure of the second space to a negative pressure lower than atmospheric pressure and to the same internal pressure as the internal pressure of the first space, each of the one end-side throttle mechanism and the another end-side throttle mechanism including a filter that reduces an air flow rate, and adjusts the air flow rate by selectively attaching the filter from among a plurality of filters having different opening shapes.