Magnetic device

Patent metadata

Field	Value
Publication number	US-12362083-B2
Application number	US-202318143087-A
Country	US
Kind code	B2
Filing date	May 4, 2023
Priority date	May 4, 2022
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

A magnetic device having a first coil and a second coil, wherein the first coil is wound in a first direction when viewed from the first terminal part of the first coil, and the second coil is wound in a second direction when viewed from the third terminal part of the second coil, wherein the first direction and the second direction are opposite to each other for canceling magnetic fluxes generated by the first coil and the second coil.

First claim

What is claimed is:

1. A magnetic device, comprising:
a body, comprising a top surface and a bottom surface;
a first conductive wire, wherein the first conductive wire comprises a first terminal part, a second terminal part, and at least one first winding turn to form a first coil, wherein the at least one first winding turn of the first coil is disposed in the body;
a second conductive wire, wherein the second conductive wire comprises a third terminal part, a fourth terminal part, and at least one second winding turn to form a second coil, wherein the at least one second winding turn of the second coil is disposed in the body, wherein a straight line passes through a first hollow space of the first coil and a second hollow space of the second coil; and
a first electrode, a second electrode, a third electrode, and a fourth electrode, wherein the first terminal part is electrically connected to the first electrode, the second terminal part is electrically connected to the second electrode, the third terminal part is electrically connected to the third electrode, and the fourth terminal part is electrically connected to the fourth electrode, wherein a first straight-line segment passing through the first electrode and the third electrode does not cross over a second straight-line segment passing through the second electrode and the fourth electrode within the boundary of the bottom surface of the body, wherein the first coil is wound in a first direction when viewed from the first terminal part, and the second coil is wound in a second direction when viewed from the third terminal part, wherein the first direction and the second direction are opposite to each other.

2. The magnetic device according to claim 1 , wherein the first direction is a clockwise direction and the second direction is a counter-clockwise direction.

3. The magnetic device according to claim 1 , wherein the first direction is a counter-clockwise direction and the second direction is a clockwise direction.

4. The magnetic device according to claim 1 , wherein the first electrode and the third electrode are input nodes, and the second electrode and the fourth electrode are output nodes, wherein the first coil is wound in a clockwise direction when viewed from the first terminal part, and the second coil is wound in a counter-clockwise direction when viewed from the third terminal part.

5. The magnetic device according to claim 1 , wherein the first electrode and the third electrode are output nodes, and the second electrode and the fourth electrode are input nodes, wherein the first coil is wound in a counter-clockwise direction when viewed from the second terminal part, and the second coil is wound in a clockwise direction when viewed from the fourth terminal part.

6. The magnetic device according to claim 1 , wherein the body comprises a first magnetic body and a second magnetic body, wherein the first coil is disposed in the first magnetic body and the second coil is disposed in the second magnetic body, wherein the first magnetic body and the second magnetic body are attached to each other by an adhesive material.

7. The magnetic device according to claim 6 , wherein the first magnetic body and the second magnetic body are made of a same magnetic material.

8. The magnetic device according to claim 4 , wherein the first electrode and the third electrode are coupled to an amplifier, wherein the first electrode and the third electrode are respectively coupled to a first terminal for receiving a first signal and a second terminal for receiving a second signal, wherein the first signal and the second signal have a same phase.

9. The magnetic device according to claim 8 , wherein each of the first signal and the second signal is an audio signal.

10. The magnetic device according to claim 8 , wherein the amplifier is a differential amplifier.

11. The magnetic device according to claim 1 , wherein the first electrode comprises a first lead frame that is disposed on a first lateral surface and extended to the bottom surface of the body.

12. The magnetic device according to claim 11 , wherein the second electrode comprises a second lead frame that is disposed on the first lateral surface and extended to the bottom surface of the body.

13. The magnetic device according to claim 12 , wherein the third electrode comprises a first third lead frame that is disposed on a second lateral surface and extended to the bottom surface of the body, wherein the first lateral surface and the second lateral surface are two opposite surfaces of the body.

14. The magnetic device according to claim 13 , wherein the fourth electrode comprises a fourth lead frame that is disposed on the second lateral surface and extended to the bottom surface of the body.

15. The magnetic device according to claim 1 , wherein the first conductive wire is a round wire, a flat wire or a square wire.

16. The magnetic device according to claim 8 , wherein the amplifier is a class-D audio amplifier.

17. The magnetic device according to claim 6 , wherein a mylar sheet is disposed on the top surface of the body.

18. The magnetic device according to claim 10 , wherein the differential amplifier outputs a third signal and a fourth signal, wherein the third signal is coupled to the first electrode via a first deadtime delay and an H-bridge.

19. The magnetic device according to claim 18 , wherein the fourth signal 1 is coupled to the third electrode via a second deadtime delay and the H-bridge.

20. The magnetic device according to claim 1 , wherein the third terminal part and the fourth terminal part of the second coil cross over each other and are electrically connected to the first electrode and the third electrode, respectively.

Assignees

• Cyntec Co Ltd

Inventors

• Liao Yu-Lin

Classifications

• H01F41/06

  Coil winding · CPC title

• H01F7/127

  Assembling · CPC title

• H01F1/16

  in the form of sheets (H01F1/147 takes precedence) · CPC title

• H01R13/7175

  Light emitting diodes (LEDs) · CPC title

• G02B6/0015

  provided on the surface of the light guide or in the bulk of it · CPC title