Electric rotating machine

• US 6,346,754 B1
• Filed: 05/26/2000
• Issued: 02/12/2002
• Est. Priority Date: 06/02/1999
• Status: Expired due to Term

• Current Assignee: mitsubishi hitachi power systems, ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Hitachi, Ltd.
• Inventors: Hattori, Kenichi, Mori, Hideaki, Shiobara, Ryoichi, Kieda, Shigekazu
• Primary Examiner(s): NGUYEN, TRAN N
• Application Number:
  US09/579,523
• Time in Patent Office: 627 Days
• Field of Search: 310/52, 310/58-60, 310/270, 310/91
• US Class Current: 310/58
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• CPC Class Codes: H02K 3/51 applicable to rotors only

Abstract

For obtaining an electric rotating machine being constructed cheaply, while cooling capacity at the end portions of the rotor coils can be improved, and being small in the size and large in the capacity, with superior reliability thereof, in an electric rotating machine, within which a coolant fluid is circulated, wherein coil support members 13 are positioned at a distance therebetween, in a space defined between the end portions 12B of the plural rotor coils, each of the coil support members 13 is formed with two (2) insertion portions 13a extending in a radial direction and a connector portion 13b connecting therebetween, as one body and in an about “H” shape in the cross-section, thereby forming spaces 13c, each of which faces the end portion 12B of the rotor coil, at both sides of the connector portion 13b.

Claims

1. An electric rotating machine, having a stator, a rotor being positioned rotatable within the stator, and a communicating apparatus for communicating a coolant fluid within said electric rotating machine, wherein said rotor comprises:

a rotor core comprising a plurality of rotor slots;

a plurality of rotor coils, each coil inserted into a rotor slot at a central portion thereof and protrudes end portions thereof outside said rotor slot; and

a plurality of coil support members having insulating property, being positioned between the plurality of end portions of the rotor coils at a distance therebetween, wherein at an inner peripheral side of said plural end portions of the rotor coils is formed a coil inner peripheral side aperture which is communicated with said coolant fluid, each of said coil support members comprises insertion portions, which are extended in a radial direction, and are formed in plural in a longitudinal direction of the coil, while abutting upon a surface of said rotor coil at both surfaces thereof, and a connector portion for connecting between said plural insertions portions, as one body, thereby forming inner-support member spaces between said insertion portions, each of which faces said rotor coil, and a recess portion is formed so that said inner-support member spaces are communicated with said coil inner peripheral side aperture at the inner peripheral side thereof.

2. An electric rotating machine as defined in claim 1, wherein a coil outer peripheral side cooling passage is formed at an outer periphery of the end portions of said rotor coils, and a communication passage is provided in said coil support member so that said inner-support member space and said coil outer peripheral side cooling passage are communicated with.

3. An electric rotating machine as defined in claim 1, wherein a communication passage is formed in said coil support member so as to communicate between said inner-support member space and other inter support member space.

4. An electric rotating machine, having a stator, a rotor being positioned rotatable within the stator, and a communicating apparatus for communicating a coolant fluid within said electric rotating machine, wherein said rotor comprises:

a rotor core comprising a plurality of rotor slots;

a plurality of rotor coils, each coil inserted into a rotor slot at a central portion thereof and protrudes end portions thereof outside said rotor slot; and

a retaining ring being positioned so that it holds said plural end portions of the rotor coils and said coil support member at an outer periphery thereof, wherein at an inner peripheral side of said plural end portions of the rotor coils is formed a coil inner peripheral side aperture which is communicated with said coolant fluid, said coil support members and inter support member spaces adjacent thereto are positioned alternately, in a longitudinal direction of the coils, between the end portions of said plural rotor coils, while said inter support member spaces are communicated with said coil inner peripheral side aperture at an inner peripheral side thereof, said coil support member is formed with insertion portions which are extended in a radial direction and are formed in plural in a longitudinal direction of the coil, while abutting upon a surface of said rotor coil at both surfaces thereto, and a connection portion for connecting between said plurality of insertion portions, as one body in an about “

H”

shape in cross-section thereof, so as to form inner-support member spaces at both sides of said connector portion, each of which faces the end portion of said rotor coil, and those inner-support member spaces are communicated with said coil inner peripheral side aperture at the inner peripheral side thereof.

5. An electric rotating machine as defined in claim 4, wherein a communication passage is formed in said coil support member so as to communicate between said inner-support member space and other inter support member space.

6. An electric rotating machine as defined in claim 4, wherein a coil outer peripheral side cooling passage is formed at an outer periphery of the end portions of said rotor coils, and a communication passage is provided in said coil support member so that said inner-support member space and said coil outer peripheral side cooling passage are communicated with.