Patent Application
20190287708
The present invention is generally related to inductors, and more particular to a large-current inductor.
An inductor may function as a choke, winding, filter, transformer, etc. As shown in
For this type of conventional inductors, the inductor usually has a greater height or length so as to achieve better inductive performance. However, this would conflict with the current downsizing trend of electronic appliances, especially for those inductors to be applied by surface-mount technology (SMT).
Therefore, to obviate the shortcomings of the prior art, the present invention provides a novel large-current inductor.
The large-current inductor includes a first core member having a first winding piece, a second winding piece, a first indentation, and a second indentation; a second core member having a third winding piece, a fourth winding piece, a third indentation, and a fourth indentation; a third core member attached and joined to first lateral sides of the first and second core members; and a fourth core member attached and joined to second lateral sides of the first and second core members. A first coil member winds around the first and third winding pieces, and has its ends embedded into the first and third indentations. A second coil member winds around the second and fourth winding pieces, and has its ends embedded into the second and fourth indentations.
Alternatively, the first and third winding are integrated into a fifth winding piece which is extended from the second core member. The second and fourth winding pieces are integrated into a sixth winding piece which is extended from the second core member. The first core member is detachably joined to the first and sixth winding pieces. In yet another embodiment, the first core member includes a first core block and a second core block. The first and second indentations are respectively provided on the first and second core blocks. The second core member includes a third core block and a fourth core block. The third and fourth indentations are respectively provided on the third and fourth core blocks. The first and third winding pieces are integrated into a seventh winding piece, and the second and fourth winding pieces are integrated into an eighth winding piece. The seventh winding piece, the first core block, and the third core block are integrally formed together. The eight winding piece, the second core block, and the fourth core block are integrally formed together.
The large-current inductor enhances efficiency of energy storage by mutual inductance, and limits large current flow by leakage inductance. The large-current inductor therefore may achieve high performance under light load, and may sustain large current under heavy load and a small form factor.
The foregoing objectives and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.
Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.
As shown in
The first core member 2 has a first winding piece 21 and a second winding piece 22, both extended in parallel from a top side, and a first indentation 23 and a second indentation 24 both arranged in parallel on a front side, of the first core member 2. The first coil member 3 has a first portion wound around the first winding piece 21, and has a first end section 31 embedded into the first indentation 23. The second coil member 4 has a first portion wound around the second winding piece 22, and has a first end second 41 embedded into the second indentation 24.
The second core member 5 has a third winding piece 55 and a fourth winding piece 56, both extended in parallel from a bottom side, and a third indentation 53 and a fourth indentation 54 both arranged in parallel on a front side, of the second core member 5. The first coil member 3 has a separate second portion wound around the third winding piece 55, and has a second end section 32 embedded into the third indentation 53. The second coil member 4 has a second portion wound around the fourth winding piece 56, and has a second end second 41 embedded into the fourth indentation 54. The third core member 6 is attached and joined, for example by adhesive, to first lateral sides of the first and second core members 2 and 5. The fourth core member 7 is attached and joined to second lateral sides, opposite to the first lateral sides, of the first and second core members 2 and 5.
In the present embodiment, the configuration of the third and fourth core members 6 and 7 increases the length of the magnetic coupling path, thereby enhancing the efficiency of energy storage by the mutual inductance. In addition, leakage inductance to limit large current flow is also respectively produced between the third and first core members 6 and 1, and between the fourth and second core members 7 and 5.
In a second embodiment as shown in
In a third embodiment shown in
While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the claims of the present invention.
