High efficiency magnetic component

Patent metadata

Field	Value
Publication number	US-10431377-B2
Application number	US-201514670081-A
Country	US
Kind code	B2
Filing date	Mar 26, 2015
Priority date	Mar 26, 2015
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A magnetic air core apparatus that includes a first toroid formed of a plate like structure wrapped in a helical shape and including an air core, further the plate like structure has an outer peripheral surface and an inner peripheral surface, a second toroid that substantially envelopes the first toroid in a concentric manner. The first and second toroids have a first air gap provided therebetween. A start terminal is connected to the first toroid and a return terminal is connected to the second toroid, the start and return terminals enable connections to other electrical devices.

First claim

What is claimed is:

1. A magnetic air core apparatus, comprising:
a first toroid formed of a plate like structure continuously wrapped in a helical shape having a substantially circular cross-section, and including an air core, the plate like structure having an outer peripheral surface and an inner peripheral surface, a width of each turn of the plate-like structure varies in width, and a gap between successive turns is straight, has a constant width, and is angled in a radial direction of the first toroid;
a second toroid substantially enveloping the first toroid in a concentric manner, the first and second toroids having a first air gap provided therebetween;
a start terminal connected to the first toroid; and
a return terminal connected to the second toroid, the start and return terminals enabling connection to other electrical devices,
wherein the second toroid includes at least one poloidal slot to enable access to the first toroid, and
the poloidal slot has a notch adjacent thereto to allow access to the start and return terminals.

2. The magnetic air core apparatus according to claim 1 , wherein a width of the outer peripheral surface of the first toroid is greater than a width of the inner peripheral surface.

3. The magnetic air core apparatus according to claim 1 , wherein the gap between successive turns creates a second capacitor.

4. The magnetic air core apparatus according to claim 1 , wherein the second toroid includes at least one toroidal slot to enable access to the first toroid.

5. The magnetic air core apparatus according to claim 1 , wherein the second toroid includes a plurality of sections, wherein each of the plurality of the sections is removably attached to change a length of the at least one poloidal slot enabling a dynamic control over the first capacitance of the first capacitor.

6. The magnetic air core apparatus according to claim 1 , wherein the first toroid and the second toroid are configured to hold the magnetic flux uniformly within the air core.

7. The magnetic air core apparatus according to claim 1 , wherein the second toroid is configured to act as a transformer.

8. The magnetic air core apparatus according to claim 1 , wherein the second toroid is configured to act as a wireless power transfer device.

9. The magnetic air core apparatus according to claim 1 , wherein the first air gap between the second toroid and the first toroid creates a first capacitor having a first capacitance.

10. The magnetic air core apparatus according to claim 9 , wherein the first capacitance of the first capacitor can be controlled by varying length of the first air gap.

11. The magnetic air core apparatus according to claim 10 , wherein a flexible circular clip attached to the second toroid varies a length of the at least one toroidal slot and the first air gap enabling a dynamic control over the first capacitance of the first capacitor.

12. The magnetic air core apparatus according to claim 1 , wherein the first toroid is configured to allow a first current flow in first direction and the second toroid is configured to allow a second current flow in a second direction.

13. The magnetic air core apparatus according to claim 12 , wherein the first direction of the first current flow is opposite to the second direction of the second current flow.

14. The magnetic air core apparatus according to claim 1 , wherein the second toroid is configured to connect a plurality of input devices and a plurality of output devices.

15. The magnetic air core apparatus according to claim 14 , wherein the plurality of input devices can be configured to operate at a same frequency as the surfaced air core or at a different frequency than the surfaced air core.

16. The magnetic air core apparatus according to claim 14 , wherein the plurality of output devices can be configured to operate at a same frequency as the surfaced air core or at a different frequency than the surfaced air core.

Assignees

• Toyota Eng & Mfg North America

Inventors

• Ishigaki Masanori

Classifications

• H01F38/14 Primary

  Inductive couplings {(for wireless supply or distribution of electric power using inductive coupling H02J50/10)} · CPC title

• H01F30/16

  Toroidal transformers · CPC title

• H02J50/70

  involving the reduction of electric, magnetic or electromagnetic leakage fields · CPC title