US 12,488,920 B2
Magnetic element
Jianxing Dong, Shanghai (CN); Liang Wang, Shanghai (CN); Teng Liu, Shanghai (CN); and Jianping Ying, Shanghai (CN)
Assigned to Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed by Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed on Jun. 4, 2025, as Appl. No. 19/227,472.
Application 19/227,472 is a division of application No. 17/556,661, filed on Dec. 20, 2021, granted, now 12,354,787.
Claims priority of application No. 202110061302.X (CN), filed on Jan. 18, 2021.
Prior Publication US 2025/0292936 A1, Sep. 18, 2025
Int. Cl. H01F 3/14 (2006.01); H01F 27/38 (2006.01)
CPC H01F 3/14 (2013.01) [H01F 27/38 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A magnetic element, comprising:
a magnetic core comprising a magnetic leg;
at least one support strip assembly disposed on the magnetic leg;
a winding wound around the at least one support strip assembly, and comprising a first end part, a second end part and a first connection part, wherein the first end part and the second end part are respectively connected with two opposite sides of the first connection part, the first end part comprises a first endpoint and a second endpoint, and the second end part comprises a third endpoint and a fourth endpoint, wherein the first endpoint and the second endpoint are connected with each other, the second endpoint is connected with the first connection part, a first projection line is formed between a projection point of the second endpoint on the magnetic leg and the second endpoint, the third endpoint and the fourth endpoint are connected with each other, the fourth endpoint is connected with the first connection part, a second projection line is formed between a projection point of the fourth endpoint on the magnetic leg and the fourth endpoint, a third projection line is formed between a projection point of the first endpoint on the magnetic leg and the first endpoint, and a fourth projection line is formed between a projection point of the third endpoint on the magnetic leg and the third endpoint, wherein a connection line between the first endpoint and the third endpoint is the longest distance of the winding in parallel with an axial direction of the magnetic leg; and
at least one first air gap arranged between the magnetic leg and the winding, wherein the at least one first air gap is at least defined by the at least one support strip assembly, wherein a first portion of the at least one first air gap is arranged between the first projection line and the second projection line, and a second portion of the at least one first air gap is beyond a region between the third projection line and the fourth projection line through at least one of the third projection line and the fourth projection line;
wherein each first air gap comprises at least one first upper air gap part and at least one first lower air gap part, and each support strip assembly comprises a single support strip, wherein the at least one first upper air gap part and the at least one first lower air gap part are formed in the support strip, wherein the at least one first upper air gap part is formed in an upper region of the support strip, and the at least one first lower air gap part is formed in a lower region of the support strip, wherein a first portion of the first upper air gap part is arranged between the first projection line and the second projection line, a second portion of the first upper air gap part is beyond a region between the third projection line and the fourth projection line through the third projection line, a first portion of the first lower air gap part is arranged between the first projection line and the second projection line, and a second portion of the first lower air gap part is beyond a region between the third projection line and the fourth projection line through the fourth projection line;
wherein the at least one first upper air gap part is not exposed to a top surface of the support strip, and the at least one first lower air gap part is not exposed to a bottom surface of the support strip.