Rotating electrical machine

Patent metadata

Field	Value
Publication number	US-12463497-B2
Application number	US-202218711525-A
Country	US
Kind code	B2
Filing date	Aug 23, 2022
Priority date	Nov 19, 2021
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A housing of a rotating electrical machine accommodates a stator and a rotor, and forms a first space communicating with a gap on a one end-side of the stator and a second space communicating with the gap on another end-side of the stator. The stator has an intermediate duct communicating with the gap. The housing has a one end-side intake port; a one end-side exhaust port; an another end-side intake port; an another end-side exhaust port; and an air intake port. The rotating electrical machine includes a one end-side throttle mechanism to suppress flow of air from the one end-side intake port to the first space more than a flow on the one end-side exhaust port side; and an another end-side throttle mechanism to suppress flow of air from the another end-side intake port to the second space more than a flow on the another end-side exhaust port side.

First claim

The invention claimed is:

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.

2 . The rotating electrical machine of claim 1 , wherein the filter of the one end-side throttle mechanism has different opening dimensions than the filter of the another end-side throttle mechanism.

Assignees

• Meidensha Electric Mfg Co Ltd

Inventors

• Matsumoto Tadahiro
• Omura Mototsugu

Classifications

• H02K5/20

  with channels or ducts for flow of cooling medium · CPC title

• H02K9/04

  having means for generating a flow of cooling medium · CPC title

• Y02T10/64

  Electric machine technologies in electromobility · CPC title

• H02K5/207 Primary

  with openings in the casing specially adapted for ambient air · CPC title