Coil, rotating electrical machine, and linear motor

Patent metadata

Field	Value
Publication number	US-9978492-B2
Application number	US-201514645424-A
Country	US
Kind code	B2
Filing date	Mar 12, 2015
Priority date	Sep 28, 2012
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

This disclosure discloses a coil. An outer shape of the coil as viewed from the first direction has an approximately rectangular shape or an approximately square shape with four corner parts. The coil includes at least one parallel part extended parallelly along the circumferential direction, and at least one connecting part arranged at a portion corresponding to any of the four corner parts, the at least one connecting part being extended along a diagonal direction with respect to the circumferential direction to connect the two parallel parts.

First claim

What is claimed is:

1. A coil including a plurality of wound parts formed by winding a conductor by one turn approximately along a predetermined circumferential direction from a starting point to an ending point, the plurality of wound parts being arranged along a first direction perpendicular to the circumferential direction, an outer shape of the coil as viewed from the first direction has an approximately rectangular shape or an approximately square shape with four corner parts, the coil comprising:
at least one parallel part extended parallelly along the circumferential direction; and
at least one connecting part arranged at a portion corresponding to any of the four corner parts, the at least one connecting part being extended along a diagonal direction with respect to the circumferential direction to connect the two parallel parts, wherein
portions corresponding to two pairs of two sides facing each other in the approximately rectangular shape or the approximately square shape of the outer shape of the coil except for the four corner parts are pressure molded.

2. The coil according to claim 1 , further comprising:
a first protruding part corresponding to a winding start that projects toward the outside of the coil along the first direction; and
a second protruding part corresponding to a winding end that projects toward the outside of the coil along the first direction, and
the first protruding part and the second protruding part are each arranged in a portion corresponding to any of the four corner parts.

3. The coil according to claim 2 , wherein;
the outer shape of the coil has the approximately rectangular shape including two long sides facing each other and two short sides facing each other, and
the first protruding part and the second protruding part are separately disposed in respective portions corresponding to two corner parts located at both ends of a specific short side of the four corner parts.

4. The coil according to claim 2 , wherein;
the first protruding part and the second protruding part are each arranged in a portion corresponding to one common corner part of the four corner parts.

5. A rotating electrical machine comprising:
a rotor including a rotating shaft; and
a stator including a stator core and a plurality of coils, the stator core including a plurality of slots arranged in a circumferential direction, the plurality of coils being inserted into the plurality of slots,
each of the plurality of coils includes a plurality of wound parts formed by winding a conductor by one turn approximately along a predetermined circumferential direction from a starting point to an ending point, the plurality of wound parts are arranged along a first direction perpendicular to the circumferential direction, an outer shape of the coil as viewed from the first direction has an approximately rectangular shape or an approximately square shape with four corner parts, the coil comprising:
at least one parallel part extended parallelly along the circumferential direction; and
at least one connecting part arranged at a portion corresponding to any of the four corner parts, the at least one connecting part being extended along a diagonal direction with respect to the circumferential direction to connect the two parallel parts, wherein
portions corresponding to two pairs of two sides facing each other in the approximately rectangular shape or the approximately square shape of the outer shape of the coil except for the four corner parts are pressure molded in a manner such that the outer shape of the coil matches the shape of the corresponding slot.

6. The rotating electrical machine according to claim 5 , wherein;
each of the plurality of coils is arranged so as to be brought into approximately close contact with a load side bracket and an opposite load side bracket facing each other in an axial direction of the rotating shaft.

7. The rotating electrical machine according to claim 6 , wherein;
the load side bracket and the opposite load side bracket each include a flow path in which refrigerant circulates at a portion facing the coil in the axial direction.

8. The rotating electrical machine according to claim 7 , wherein;
each of the plurality of coils includes:
a first protruding part corresponding to a winding start that projects toward the outside of the coil along the first direction; and
a second protruding part corresponding to a winding end that projects toward the outside of the coil along the first direction,
the first protruding part and the second protruding part are each arranged in a portion corresponding to any of the four corner parts, and
the rotating electrical machine further comprises a wire connection part that connects the first protruding part and the second protruding part of the plurality of coils, the wire connection part being arranged at an area on the outer peripheral side than the plurality of coils.

9. A linear motor comprising:
a field system including a plurality of permanent magnets linearly arranged; and
an armature arranged so as to face the plurality of permanent magnets in parallel to each other via a magnetic air gap, the armature including an armature base and a plurality of coils secured to the armature base,
either one of the field system and the armature being used as a stator and the other one being used as a mover, the mover being traveled along a predetermined traveling direction,
each of the plurality of coils includes a plurality of wound parts formed by winding a conductor by one turn approximately along a predetermined circumferential direction from a starting point to an ending point, the plurality of wound parts are arranged along a first direction perpendicular to the circumferential direction, an outer shape of the coil as viewed from the first direction has an approximately rectangular shape or an approximately square shape with four corner parts, the coil comprising:
at least one parallel part extended parallelly along the circumferential direction; and
at least one connecting part arranged at a portion corresponding to any of the four corner parts, the at least one connecting part being extended along a diagonal direction with respect to the circumferential direction to connect the two parallel parts, wherein
portions corresponding to two pairs of two sides facing each other in the approximately rectangular shape or the approximately square shape of the outer shape of the coil except for the four corner parts are pressure molded.

10. The linear motor according to claim 9 , wherein;
the armature further includes
a bracket secured to the armature base to accommodate and arrange the plurality of coils, and
each of the plurality of coils is arranged so as to be brought into approximately close contact with the bracket.

11. The linear motor according to claim 10 , wherein;
each of the plurality of coils includes:
a first protruding part corresponding to a winding start that projects toward the outside of the coil along the first direction; and
a second protruding part corresponding to a winding end that projects toward the outside of the coil along the first direction,
the first protruding part and the second protruding part are each arranged in a portion corresponding to any of the four corner parts, and
the linear motor further comprises a wire connection part that connects the first protruding part and the second protruding part of the plurality of coils, the wire connection part being arranged at an area between the plurality of coils and the armature base.

12. A coil, in which a conductor is wound by one turn approximately along a predetermined circumferential directio

Assignees

• Yaskawa Electric Corp

Inventors

• Makino Shogo
• Nonaka Tuyoshi
• Kamo Mitsunori

Classifications

• H01F5/02 Primary

  wound on non-magnetic supports, e.g. formers · CPC title

• H02K3/524

  for U-shaped, E-shaped or similarly shaped cores · CPC title

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K9/22

  by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges · CPC title

• H02K3/18

  Windings for salient poles · CPC title