Rotating electrical machine

Patent metadata

Field	Value
Publication number	US-9559557-B2
Application number	US-201114131093-A
Country	US
Kind code	B2
Filing date	Aug 11, 2011
Priority date	Aug 11, 2011
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

This rotating electrical machine has a rotor, stator core, field windings for multiple poles, and armature windings for the multiple poles. The rotor is rotatably supported about a shaft. Convex-shaped multiple salient pole sections are formed on the outer circumference of the rotor while arranged in the circumferential direction. The stator core is provided along the outer circumference of the rotor with an air gap from the rotor. Convex-shaped multiple teeth are formed on the inner circumference of the stator core while arranged in the circumferential direction. The field windings for the multiple poles are wound around each of the multiple teeth while insulated from the field windings.

First claim

What is claimed is:

1. A rotating electrical machine comprising:
a rotor which is rotatably supported and which has, on its outer circumference, a plurality of convex-shaped salient pole sections arranged in a circumferential direction;
a stator core which is disposed around the outer circumference of the rotor with an air gap formed therebetween and which has, on its inner circumference, a plurality of convex-shaped teeth arranged in a circumferential direction, with axial-direction grooves that are formed on radial-direction inner sides of the teeth and open to radial-direction inner sides and both axial-direction sides and extend in the axial-direction;
field windings each of which is wound around each of the plurality of the teeth, each of the field windings forming a pole; and
armature windings each of which is wound around each of the plurality of the teeth so as to be insulated from the field windings, forming a plurality of poles,
a plurality of conductor rods that are disposed in each of the axial-direction grooves; and
a plurality of conductor connection members that are disposed on each of both sides of axial-direction outer sides of the rotor, and to each of which axial-direction end portions of a predetermined number of the conductor rods are connected, and which make up one closed electrical circuit along with a plurality of the conductor rods, wherein
the number of the teeth and the number of the poles formed by the field windings are equal, and
a ratio of the number of the poles formed by the field windings to the number of the poles formed by the armature windings is equal to a predetermined ratio, and the number of the salient pole sections formed in the rotor is equal to (p f +p a )/2, where p f is the number of the poles formed by the field windings, and p a is the number of the poles formed by the armature windings.

2. The rotary electrical machine according to claim 1 , wherein:
the armature windings form three-phase windings of U-phase, V-phase, and W-phase on the teeth;
the U-phase includes a first U-phase part, and a second U-phase part of a different pole from the first U-phase part;
the V-phase includes a first V-phase part, and a second V-phase part of a different pole from the first V-phase part;
the W-phase includes a first W-phase part, and a second W-phase part of a different pole from the first W-phase part; and
the plurality of conductor connection members include:
a first connection member that connects a first end portion with one of the one-side end portion and other-side second end portion of the conductor rod disposed in the axial-direction groove of the teeth corresponding to the first U-phase part, and a first end portion of the conductor rod disposed in the axial-direction groove of the teeth corresponding to the first V-phase part,
a second connection member that connects a second end portion of the conductor rod disposed in the axial-direction groove of the teeth corresponding to the first V-phase part, and a second end portion of the conductor rod disposed in the axial-direction groove of the teeth corresponding to the first W-phase part,
a third connection member that connects a first end portion of the conductor rod disposed in the axial-direction groove of the teeth corresponding to the first W-phase part, and a first end portion of the conductor rod disposed in the axial-direction groove of the teeth corresponding to the second U-phase part,
a fourth connection member that connects a second end portion of the conductor rod disposed in the axial-direction groove of the teeth corresponding to the second U-phase part, and a second end portion of the conductor rod disposed in the axial-direction groove of the teeth corresponding to the second V-phase part,
a fifth connection member that connects a first end portion of the conductor rod disposed in the axial-direction groove of the teeth corresponding to the second V-phase part, and a first end portion of the conductor rod disposed in the axial-direction of the teeth corresponding to the second W-phase part, and
a sixth connection member that connects a second end portion of the conductor rod disposed in the axial-direction groove of the teeth corresponding to the second W-phase part, and the second end portion of the conductor rod disposed in the axial-direction groove of the teeth corresponding to the first U-phase part.

3. The rotary electrical machine according to claim 2 , wherein:
the first connection member, the conductor rod that is disposed in the axial-direction groove of the teeth corresponding to the first U-phase part, and the conductor rod that is disposed in the axial-direction groove of the teeth corresponding to the first V-phase part are formed integrally;
the third connection member, the conductor rod that is disposed in the axial-direction groove of the teeth corresponding to the first W-phase part, and the conductor rod that is disposed in the axial-direction groove of the teeth corresponding to the second U-phase part are formed integrally; and
the fifth connection member, the conductor rod that is disposed in the axial-direction groove of the teeth corresponding to the second V-phase part, and the conductor rod that is disposed in the axial-direction groove of the teeth corresponding to the second W-phase part are formed integrally.

4. The rotating electrical machine according to claim 1 , wherein
a rotating magnetic field is generated corresponding to that obtained by assuming that the rotor is rotated at a speed of (1+p f /p a ) times the actual rotating speed of the rotor.

5. The rotating electrical machine according to claim 1 , wherein
a relationship between the number of the poles formed by the field windings and the number of the poles of the armature windings satisfies p f /p a =.5.

6. The rotating electrical machine according to claim 1 , wherein
a relationship between the number of poles formed by the field windings and the number of poles of the armature windings satisfies p f /p a =1.2.

7. The rotating electrical machine according to claim 1 , wherein
a relationship between the number of poles formed by the field windings and the number of poles of the armature windings satisfies p f /p a =1.125.

Assignees

• Tsuda Toshihiro
• Kawamura Mitsuhiro
• Fukami Tadashi
• Shima Kazuo
• Toshiba Mitsubishi-Electric Ind Systems Corp
• Kanazawa Inst Of Technology

Inventors

• Tsuda Toshihiro
• Kawamura Mitsuhiro
• Fukami Tadashi
• Shima Kazuo

Classifications

• H02K3/00

  Details of windings · CPC title

• H02K7/1838

  Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine · CPC title

• H02K3/16 Primary

  for auxiliary purposes, e.g. damping or commutating · CPC title

• H02K19/10

  for multi-phase current · CPC title

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title