CN-224217333-U - High-frequency high-current inductor with high precision

Abstract

The utility model provides a high-precision high-frequency high-current inductor, which comprises a magnetic core with magnetism, a terminal with conductivity and a magnetic cover with magnetic conductivity. The terminal comprises a first section, a second section and a third section, wherein the second section and the third section are arranged at two ends of the first section, and the first section, the second section and the third section semi-surround the magnetic core. The magnetic shield is provided with a containing cavity and an opening, the opening is communicated with the containing cavity and an external space, the containing cavity is used for containing the magnetic core and the terminal, and one ends of the second section and the third section, which are far away from the first section, are exposed out of the magnetic shield. When the terminals are welded on the PCB, the magnetic cover and the PCB completely enclose the magnetic core, so that the magnetic leakage phenomenon is avoided. And, the magnetic shield has magnetic conductivity property, so that the anti-interference capability of the inductor can be enhanced. By implementing the high-precision high-frequency high-current inductor, the inductor suitable for a server power supply and a GPU can be realized.

Inventors

• TANG QIONG
• Miao Huaqing
• Yuan Chujun

Assignees

• 深圳市科达嘉电子有限公司

Dates

Publication Date

20260508

Application Date

20250421

Claims (10)

1. 1. A high-frequency high-current inductor with high precision, comprising: A magnetic core having magnetism; A terminal having conductivity, the terminal including a first section, and second and third sections disposed at both ends of the first section, the second section, and the third section half-surrounding the magnetic core; The magnetic shield has magnetic conductivity, the magnetic shield has a containing cavity and an opening, the opening is communicated with the containing cavity and an external space, the containing cavity is used for containing the magnetic core and the terminal, and one ends of the second section and the third section, which are far away from the first section, are exposed out of the magnetic shield.
2. 2. The high-precision high-frequency high-current inductor according to claim 1, wherein said first segment is provided with at least two positioning holes, and said magnetic core is provided with positioning bosses corresponding to said positioning holes.
3. 3. A high-precision high-frequency high-current inductor according to claim 1, wherein a chute is provided in said housing chamber, and said second section and/or said third section are insertable into said chute in the width direction.
4. 4. The high-frequency high-current inductor according to claim 1, wherein said second segment and said third segment are provided with pins at ends far from said first segment, said magnetic shield is provided with positioning points corresponding to said openings, said positioning points being used for positioning said pins.
5. 5. A high frequency high current inductor according to claim 4 wherein said pins have pin slots, said anchor points being located at said pin slots.
6. 6. The high-precision high-frequency high-current inductor according to claim 1, wherein the magnetic cover has a magnetic permeability of 900-3300 ui.
7. 7. The high-precision high-frequency high-current inductor according to claim 6, wherein said magnetic shield is made of one of Mn-Zn ferrite, ni-Zn ferrite and amorphous nanocrystalline material.
8. 8. A high-precision high-frequency high-current inductor according to claim 1, wherein said terminals are plated with nickel or tin.
9. 9. The high-frequency high-current inductor according to claim 1, wherein the BS value of the core is 1.0 to 1.6t.
10. 10. The high-precision high-frequency high-current inductor according to claim 1, wherein a portion of said magnetic core extending from said housing cavity is coplanar with an outer wall surface of said magnetic shield.

Description

High-frequency high-current inductor with high precision Technical Field The utility model relates to the field of electronic components, in particular to a high-frequency high-current inductor with high precision. Background A server power supply (such as a 48V DC/DC converter) and an AI acceleration card power supply (such as a GPU/ASIC power supply module) provide strict four-dimensional requirements for an inductor, namely 1, the power consumption of an AI training cluster single cabinet exceeds 50kW, the inductance volume needs to be compressed to be below 60% of that of a traditional design, 2, the transient response limit is reached, the GPU core current change rate (di/dt) reaches 5000A/mu s, the fluctuation of the inductance value is required to be < +/-2%, 3, EMC zero tolerance is achieved, namely, the electromagnetic interference (CISPR 32Class B) exceeding in a data center rack can lead to the downtime of the whole cabinet, and 4, the high-temperature life challenge is that 10 ten thousand hours life (MTBF >1e6 hours) is required under 80 ℃ environment temperature and spontaneous heating. The transient current causes saturation, the existing power inductor has insufficient direct current superposition capability, and the voltage ripple of the GPU is more than 100mV, so that circuit protection is triggered frequently. The existing inductor cannot meet the application requirements of a server power supply and a GPU. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a high-frequency high-current inductor with high precision so as to realize the inductor suitable for a server power supply and a GPU. To this end, in one embodiment, a high-frequency high-current inductor with high precision is provided, including: A magnetic core having magnetism; A terminal having conductivity, the terminal including a first section, and second and third sections disposed at both ends of the first section, the second section, and the third section half-surrounding the magnetic core; The magnetic shield has magnetic conductivity, the magnetic shield has a containing cavity and an opening, the opening is communicated with the containing cavity and an external space, the containing cavity is used for containing the magnetic core and the terminal, and one ends of the second section and the third section, which are far away from the first section, are exposed out of the magnetic shield. As a further alternative of the high-precision high-frequency high-current inductor, the first section is provided with at least two positioning holes, and the magnetic core is provided with positioning bosses corresponding to the positioning holes. As a further alternative of the high-precision high-frequency high-current inductor, a chute is provided in the housing cavity, and the second section and/or the third section can be inserted into the chute in the width direction. As a further alternative scheme of the high-frequency high-current inductor with high precision, a pin is arranged at one end, far away from the first section, of the second section and the third section, a positioning point is arranged at the position, corresponding to the opening, of the magnetic shield, and the positioning point is used for positioning the pin. As a further alternative to the high-precision high-frequency high-current inductor, the pin has a pin slot, the anchor point being located at the pin slot. As a further alternative of the high-precision high-frequency high-current inductor, the magnetic permeability of the magnetic cover is 900-3300 ui. As a further alternative scheme of the high-precision high-frequency high-current inductor, the magnetic cover is made of one of Mn-Zn ferrite, ni-Zn ferrite and amorphous nanocrystalline materials. As a further alternative to the high-precision high-frequency high-current inductor, the terminals are plated with nickel or tin. As a further alternative of the high-precision high-frequency high-current inductor, the BS value of the magnetic core is 1.0-1.6T. As a further alternative of the high-precision high-frequency high-current inductor, a portion of the magnetic core extending out of the accommodating cavity is coplanar with an outer wall surface of the magnetic cover. The implementation of the embodiment of the utility model has the following beneficial effects: According to the high-frequency high-current inductor with high precision in the above embodiment, the terminal is generally in a strip shape, and the first section, the second section and the third section are formed by bending twice. The terminals are half-encased around the core and then the terminals and core are placed together into a receiving cavity in the magnetic shield. When the terminals are welded on the PCB, the magnetic cover and the PCB completely enclose the magnetic core, so that the magnetic leakage phenomenon is avoided. And, the magnetic shield has magnetic conductivity property, so