Three-phase reactor including vibration suppressing structure part

Patent metadata

Field	Value
Publication number	US-10910146-B2
Application number	US-201916662224-A
Country	US
Kind code	B2
Filing date	Oct 24, 2019
Priority date	Jan 18, 2017
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

A three-phase reactor includes an outer peripheral iron core for surrounding the outer periphery of the three-phase reactor, and at least three iron core coils, which are in contact with or coupled to the inner surface of the outer peripheral iron core. The at least three iron core coils includes iron cores and coils wound around the iron cores. Gaps, which can be magnetically coupled, are each formed between two adjacent ones of the iron cores. The three-phase reactor further includes a vibration suppressing structure part disposed in the vicinity of the gaps so as to reduce vibrations occurring at the gaps.

First claim

What is claimed is:

1. A three-phase reactor comprising:
an outer peripheral iron core for surrounding the outer periphery of the three-phase reactor;
at least three iron core coils, which are in contact with or coupled to the inner surface of the outer peripheral iron core, wherein the at least three iron core coils include iron cores and coils wound around the iron cores, a center gap which is formed at a center of the three-phase reactor, and at least three side gaps, which can be magnetically coupled, are each formed between adjacent ones of the at least three iron cores; and
a vibration suppressing structure part disposed in the center gap, in the stacking direction of the iron cores, wherein the vibration suppressing structure part includes:
at least three extensions that radially extend from the center gap towards the outer peripheral iron core, and contact the at least three iron core coils,
at least three legs that radially extend from the center gap through the at least three side gaps towards the outer peripheral iron core.

2. The three-phase reactor according to claim 1 , wherein the vibration suppressing structure part includes a vibration reducing part having an elastic configuration, and a fixture for securing the vibration reducing part to the iron cores.

3. The three-phase reactor according to claim 1 , wherein the vibration suppressing structure part is disposed at least one end of the three-phase reactor in the stacking direction of the iron cores.

4. The three-phase reactor according to claim 1 , wherein the vibration suppressing structure part is disposed at least one end of the three-phase reactor in the stacking direction of the iron cores.

5. The three-phase reactor according to claim 2 , wherein the fixture is a screw or a combination of a screw and a nut.

6. The three-phase reactor according to claim 1 , wherein the vibration reducing part includes at least one leg to be inserted between two adjacent ones of the iron cores.

7. The three-phase reactor according to claim 1 , wherein the vibration reducing part is formed from a non-magnetic body.

8. The three-phase reactor according to claim 6 , wherein the vibration reducing part includes additional legs perpendicularly at least partially extending with respect to the legs from the tips of the legs and coming into contact with the side faces of the iron cores.

9. The three-phase reactor according to claim 6 , wherein the vibration reducing part includes additional legs perpendicularly at least partially extending with respect to the legs and being respectively inserted into the gaps.

10. A motor driving device comprising the three-phase reactor according to claim 1 .

11. A motor driving device comprising the three-phase reactor according to claim 1 .

12. A motor driving device comprising the three-phase reactor according to claim 2 .

13. A motor driving device comprising the three-phase reactor according to claim 3 .

14. A motor driving device comprising the three-phase reactor according to claim 1 .

15. A motor driving device comprising the three-phase reactor according to claim 4 .

16. A motor driving device comprising the three-phase reactor according to claim 5 .

17. A motor driving device comprising the three-phase reactor according to claim 6 .

18. A motor driving device comprising the three-phase reactor according to claim 7 .

19. A motor driving device comprising the three-phase reactor according to claim 8 .

20. A motor driving device comprising the three-phase reactor according to claim 9 .

Assignees

• Fanuc Corp

Inventors

• Tsukada Kenichi
• Shirouzu Masatomo

Classifications

• H01F3/14 Primary

  Constrictions; Gaps, e.g. air-gaps (in magnetic shunt paths H01F3/12) · CPC title

• H01F27/306 Primary

  Fastening or mounting coils or windings on core, casing or other support · CPC title

• H01F37/00 Primary

  Fixed inductances not covered by group H01F17/00 · CPC title

• H01F27/24

  Magnetic cores · CPC title

• H01F27/33

  Arrangements for noise damping · CPC title