Air core type reactor unit and electric power supply equipment having an air core type reactor unit

• US 10,529,478 B2
• Filed: 08/09/2016
• Issued: 01/07/2020
• Est. Priority Date: 08/09/2016
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Yoshida, Toshihiro, Nakatani, Hajime, Takauchi, Daisuke, Kumagai, Takashi, Shimohata, Kenji, Tamida, Taichiro
• Primary Examiner(s): Behm, Harry R
• Application Number:
  US16/319,830
• Publication Number:
  US 20190221354A1
• Time in Patent Office: 1,246 Days
• CPC Class Codes: H01F 2027/348 Preventing eddy currents
• CPC Class Codes: H01F 27/08 Cooling heat-transfer elements F28F; Ventilating structural details of casings H01F27/02
• CPC Class Codes: H01F 27/085 Cooling by ambient air
• CPC Class Codes: H01F 27/28 Coils; Windings; Conductive connections
• CPC Class Codes: H01F 27/29 Terminals; Tapping arrangements for signal inductances
• CPC Class Codes: H01F 27/346 Preventing or reducing leakage fields using magnetic shields H01F27/36; using auxiliary windings H01F27/38
• CPC Class Codes: H01F 30/08 without magnetic core
• CPC Class Codes: H01F 37/005 without magnetic core
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections

Abstract

An air core type reactor unit, includes a first insulating plate which is provided with a first insulating spacer on one side, a first ferromagnetic member metal plate fixed to an insulating plate, two or more air core coils each having an air core part and formed of coil layers with the separation of an air gap, a second insulating plate, which is provided with a second insulating spacer on another side thereof and has a width smaller than an inside diameter of the coil, to incorporate more air into, a second ferromagnetic member metal plate fixed to an insulating plate, and an insulating stick passing through the air core part of the air core coils, wherein the air core coils are arranged in parallel, and held and fixed between the first insulating plate and the second insulating plate through the first insulating spacer and the second insulating spacer.

Claims

1. An air core type reactor unit, comprising:

a first ferromagnetic member;

an air core coil which is composed of two or more solenoid type coils, each having an air core part;

an insulating plate; and

a second ferromagnetic member attached to the insulating plate, wherein the second ferromagnetic member and the insulating plate each have a width that is smaller than an inside diameter of the air core coil.

2. The air core type reactor unit according to claim 1,

wherein the air core coil is configured to have coil layers which are formed with an air gap in between.

3. The air core type reactor unit according to claim 2,

wherein the first ferromagnetic member and the second ferromagnetic member include a plurality of boards and those boards are held with a space in between.

4. The air core type reactor unit according to claim 3,

wherein the first ferromagnetic member and the second ferromagnetic member are configured to have a greater number of boards at a central part than at an end part.

5. The air core type reactor unit according to claim 2,

wherein the first ferromagnetic member and the second ferromagnetic member are arranged to have no spacing in a longitudinal direction and a certain spacing in a width direction.

6. The air core type reactor unit according to claim 2,

wherein the air core coil includes two or more air core coils in the same configuration which are arranged on a plane, and electrical connections are made so that the neighboring magnetic poles of the air core coils may have reverse polarity with respect to each other.

7. An electric power supply equipment comprising;

an input transformer which outputs alternating current power,

an inverter which inputs an output of the input transformer and outputs direct current power, and

an air core type reactor unit of claim 2, arranged at an output side of the inverter.

8. The air core type reactor unit according to claim 1,

wherein the first ferromagnetic member and the second ferromagnetic member include a plurality of boards and those boards are held with a space in between.

9. The air core type reactor unit according to claim 8,

wherein the first ferromagnetic member and the second ferromagnetic member are configured to have a greater number of boards at a central part than at an end part.

10. An electric power supply equipment comprising;

an input transformer which outputs alternating current power,

an inverter which inputs an output of the input transformer and outputs direct current power, and

an air core type reactor unit of claim 9, arranged at an output side of the inverter.

11. The air core type reactor unit according to claim 8,

wherein the air core coil includes two or more air core coils in the same configuration which are arranged on a plane, and electrical connections are made so that the neighboring magnetic poles of the air core coils may have reverse polarity with respect to each other.

12. An electric power supply equipment comprising;

an input transformer which outputs alternating current power,

an inverter which inputs an output of the input transformer and outputs direct current power, and

an air core type reactor unit of claim 8, arranged at an output side of the inverter.

13. The air core type reactor unit according to claim 1,

wherein the first ferromagnetic member and the second ferromagnetic member are arranged to have no spacing in a longitudinal direction and a certain spacing in a width direction.

14. The air core type reactor unit according to claim 13,

wherein the air core coil includes two or more air core coils in the same configuration which are arranged on a plane, and electrical connections are made so that the neighboring magnetic poles of the air core coils may have reverse polarity with respect to each other.

15. An electric power supply equipment comprising;

an input transformer which outputs alternating current power,

an inverter which inputs an output of the input transformer and outputs direct current power, and

an air core type reactor unit of claim 13, arranged at an output side of the inverter.

16. The air core type reactor unit according to claim 1,

wherein the air core coil includes two or more air core coils in the same configuration which are arranged on a plane, and electrical connections are made so that the neighboring magnetic poles of the air core coils may have reverse polarity with respect to each other.

17. An electric power supply equipment comprising;

an input transformer which outputs alternating current power,

an inverter which inputs an output of the input transformer and outputs direct current power, and

an air core type reactor unit of claim 16, arranged at an output side of the inverter.

18. An electric power supply equipment comprising;

an input transformer which outputs alternating current power,

an inverter which inputs an output of the input transformer and outputs direct current power, and

an air core type reactor unit of claim 1, arranged at an output side of the inverter.