# US 8,786,147 B2 · Totally-enclosed horizontal rotating electric machine

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- Number: US 8,786,147 B2
- Document ID: US8786147B2
- Status: Granted
- Kind: B2
- Application number: 13/583,736
- Filed: 2010-06-28
- Published: 2013-01-03
- Granted: 2014-07-22
- Earliest claimed: 2010-06-28
- Assignees: Mitsubishi Electric Corporation
- Applicants: Koji Kawashima; Fumio Matsumoto
- Inventors: Koji Kawashima; Fumio Matsumoto
- Web page: https://patentgrep.com/patent/US8786147B2

## CPC

- H02K 9/12: wherein the cooling medium circulates freely within the casing
- H02K 5/203: {specially adapted for liquids, e.g. cooling jackets}
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

In a totally-enclosed horizontal rotating electric machine in which a rotor horizontally arranged and a stator arranged at an outer circumference side of the rotor are hermetically sealed in a main frame, and the rotor and the stator are cooled by circulating refrigerant gas, which is encapsulated in the main frame, through a refrigerant passageway, and water-cooled heat exchangers for cooling the refrigerant gas are provided on the way of the refrigerant passageway, the heat exchangers are respectively arranged in a longitudinal direction at each of positions neighboring both left-right end portions at a front side and both left-right end portions at a rear side of the main frame, and a feed-water inlet and a drain outlet of cooling water are provided at an upper side of the heat exchangers.

## Claims

### Claim 1

A totally-enclosed horizontal rotating electric machine in which a rotor horizontally arranged and a stator arranged at an outer circumference side of the rotor are hermetically sealed in a main frame, and the rotor and the stator are cooled by circulating refrigerant gas, which is encapsulated in the main frame, through a refrigerant passageway, and water-cooled heat exchangers for cooling the refrigerant gas are provided on the way of the refrigerant passageway; wherein
the heat exchangers are respectively arranged in a longitudinal direction at each of positions neighboring both left-right end portions at a front side and both left-right end portions at a rear side of the main frame, in a state where the main frame is viewed from a side-surface direction orthogonal to an axis line of the rotor, and a feed-water inlet and a drain outlet of cooling water are provided at an upper side of the heat exchangers.

### Claim 2 (depends on 1)

A totally-enclosed horizontal rotating electric machine as recited in claim 1, wherein main portions of the heat exchangers are surrounded by heat-exchanger covers, and the feed-water inlet and the drain outlet of cooling water for the heat exchangers are provided at upper sides, which are not surrounded by heat-exchanger covers, of the heat exchangers.

### Claim 3 (depends on 1)

A totally-enclosed horizontal rotating electric machine as recited in claim 1, wherein feed-water pipes connected to the feed-water inlet and drain pipes connected to the drain outlet of the heat exchangers are distributed from the feed-water inlet and the drain outlet to a portion neighboring a lower portion at the front side or rear side of the main frame, and contact portions for a cooling-water-distribution pipe from a cooling-water supplier disposed at an outside area of the rotating electric machine are assembled at the front side or the rear side of the main frame.

### Claim 4 (depends on 2)

A totally-enclosed horizontal rotating electric machine as recited in claim 2, wherein feed-water pipes connected to the feed-water inlet and drain pipes connected to the drain outlet of the heat exchangers are distributed from the feed-water inlet and the drain outlet to a portion neighboring a lower portion at the front side or rear side of the main frame, and contact portions for a cooling-water-distribution pipe from a cooling-water supplier disposed at an outside area of the rotating electric machine are assembled at the front side or the rear side of the main frame.

### Claim 5 (depends on 1)

A totally-enclosed horizontal rotating electric machine as recited in claim 1, wherein the heat exchangers and heat-exchanger covers, which surround main portions of the heat exchangers so as to form a portion of the refrigerant passageway and protect the heat exchangers, are detachably attached to the main frame.

### Claim 6 (depends on 2)

A totally-enclosed horizontal rotating electric machine as recited in claim 2, wherein the heat exchangers and heat-exchanger covers, which surround main portions of the heat exchangers so as to form a portion of the refrigerant passageway and protect the heat exchangers, are detachably attached to the main frame.

### Claim 7 (depends on 3)

A totally-enclosed horizontal rotating electric machine as recited in claim 3, wherein the heat exchangers and heat-exchanger covers, which surround main portions of the heat exchangers so as to form a portion of the refrigerant passageway and protect the heat exchangers, are detachably attached to the main frame.

### Claim 8 (depends on 4)

A totally-enclosed horizontal rotating electric machine as recited in claim 4, wherein the heat exchangers and heat-exchanger covers, which surround main portions of the heat exchangers so as to form a portion of the refrigerant passageway and protect the heat exchangers, are detachably attached to the main frame.