CN216873067U

CN216873067U - High-precision segmented high-frequency switching power supply

Info

Publication number: CN216873067U
Application number: CN202220363558.6U
Authority: CN
Inventors: 黄瑞炉; 陈顺昌; 周强; 丁少云
Original assignee: Shenzhen Liyuan Haina Energy Co ltd
Current assignee: Shenzhen Liyuan Haina Energy Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-07-01
Anticipated expiration: 2032-02-22

Abstract

The utility model is suitable for the field of power supply devices, and provides a high-precision segmented high-frequency switching power supply which comprises a digital control module, a current sampling module and a plurality of power supply modules, wherein the input positive terminals, the input negative terminals and the output negative terminals of every two power supply modules are connected through leads; each power module is subjected to closed-loop control through the digital control module, and each power module is independently sampled through the current sampling module, so that reasonable gear division and independent adjustment and sampling can be performed in a full current range, and the current precision output by each power module is ensured to be lower than 1%.

Description

High-precision segmented high-frequency switching power supply

Technical Field

The utility model belongs to the field of power supply devices, and particularly relates to a high-precision segmented high-frequency switching power supply.

Background

The switching power supply is also called as an exchange power supply and a switching converter, is a high-frequency electric energy conversion device, is a power supply, and is used for carrying out gear division on full-range current and independently sampling and controlling the full-range current. The high-frequency digital switching power supply in the market generally adopts a hardware control strategy, the current precision requirement of 1% can not be basically met below 5% -10% of load, the current overshoot phenomenon is easy to occur in the process of frequently switching current, and particularly, the common switching power supply can not meet the market requirement for the current precision requirement of high-precision projects such as chip processing and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a high-precision segmented high-frequency switching power supply.

The utility model is realized by the following steps: the utility model provides a high accuracy segmentation high frequency switch power supply, includes digital control module, current sampling module and a plurality of power module, per two all connect through the wire between the input positive terminal on the power module, between the input negative terminal and between the output negative terminal, each be equipped with drive signal interface and current signal interface on the power module, the drive signal interface all with digital control module connects, the current signal interface all with current sampling module connects, current sampling module with digital control module connects, with each the current information correspondence feedback that power module gathered feeds back to digital control module.

Furthermore, the current sampling module is provided with input ends and output ends, the number of the input ends is consistent with that of the power supply modules, each power supply module is connected with one of the input ends of the current sampling module, and current signals are transmitted to the digital control module through one of the output ends of the current sampling module.

Furthermore, each power module comprises an output metal oxide semiconductor field effect transistor which can be controlled by software.

Furthermore, the number of the power supply modules is four.

Further, the four power modules are respectively a 100A power module, a 40A power module, a 20A power module and a 4A power module.

According to the high-precision segmented high-frequency switching power supply, every two power supply modules are connected in a closed loop mode, each power supply module is subjected to closed-loop control through the digital control module, each power supply module is independently sampled through the current sampling module, the digital control module adjusts and controls the corresponding power supply module again according to current signals fed back by the circuit sampling module, reasonable gear division can be carried out in the full current range, independent adjustment and sampling can be carried out, and the current precision output by each power supply module is guaranteed to be lower than 1%.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention.

Fig. 1 is a schematic diagram of a framework provided by the present invention.

Fig. 2 is a schematic circuit diagram of the digital control module controlling one of the power modules according to the present invention.

The reference numbers illustrate: 1. a digital control module; 2. a current sampling module; 3. and a power supply module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Please refer to fig. 1-2, for the utility model discloses a high-accuracy segmentation high frequency switching power supply, including digital control module 1, current sampling module 2 and a plurality of power module 3, per two all connect through the wire between the input positive terminal on the power module 3, between the input negative pole end and between the output negative pole end, namely per two realize the closed loop connection between the power module 3, preferably, each power module 3 all includes but software control's output Metal Oxide Semiconductor Field Effect Transistor (MOSFET), can eliminate the electric current gear when the power is out of work and produce the phenomenon of the anti-current of irritating by the influence of external environment, and the safety in utilization performance is high. Each power module 3 is provided with a driving signal interface and a current signal interface, the driving signal interfaces are all connected with the digital control module 1, and the digital control module 1 can independently control each power module 3 through the driving signal interfaces on each power module 3, so that seamless switching of power current is realized. The current signal interface all with current sampling module 2 is connected, current sampling module 2 with digital control module 1 is connected, current sampling module 2 passes through current signal interface carries out current information's sampling operation to each power module 3 alone, and with each current information correspondence feedback that power module 3 gathered is given back to digital control module 1, digital control module 1 passes through again current information that current sampling module 2 feedbacks is to corresponding power module 3 carries out regulation control. Because every two power modules 3 are connected in a closed loop, the digital control module 1 performs independent closed loop control on each power module 3, so that the control time of calculation, judgment and the like of the digital control module 1 and the sampling feedback time of the current sampling module 2 are greatly shortened, high efficiency is realized, a stable operating environment is provided for the digital control module 1 to repeatedly switch the power current, the phenomenon of current overshoot in the multi-gear current switching process is avoided, and the accuracy of the current output by each power module 3 is ensured to be lower than 1%.

Furthermore, be equipped with on the current sampling module 2 with power module 3 quantity consistent's input and output, each power module 3 and one the input of current sampling module 2 is connected to carry current signal to through one the output of current sampling module 2 digital control module 1. One is power module 3 last current signal interface and one the corresponding cooperation of input port of current sampling module 2 is through one current sampling module 2's delivery outlet with digital control module 1 is connected, and the interface one-to-one guarantees current sampling module 2 can clearly gather each power module 3's current information avoids obscuring, influences digital control module 1's judgement regulation control operation.

In this embodiment, the number of the power modules 3 is four, and the four power modules 3 are specifically a 100A power module, a 40A power module, a 20A power module, and a 4A power module, respectively, and have high selectivity and strong adaptability.

The present invention is not limited to the above preferred embodiments, and any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a high accuracy segmentation high frequency switching power supply which characterized in that: including digital control module (1), current sampling module (2) and a plurality of power module (3), per two all connect through the wire between the input positive terminal on power module (3), between the input negative terminal and between the output negative terminal, each be equipped with drive signal interface and current signal interface on power module (3), the drive signal interface all with digital control module (1) is connected, the current signal interface all with current sampling module (2) are connected, current sampling module (2) with digital control module (1) is connected, will each the current information correspondence feedback that power module (3) gathered feeds back to digital control module (1).

2. A high-precision segmented high-frequency switching power supply according to claim 1, characterized in that: be equipped with on current sampling module (2) with power module (3) quantity consistent's input and output, each power module (3) and one the input of current sampling module (2) is connected to through one current signal is carried to current sampling module's (2) output digital control module (1).

3. A high-precision segmented high-frequency switching power supply according to claim 1, characterized in that: each power module (3) comprises a software-controllable output MOSFET.

4. A high-precision, segmented high-frequency switching power supply according to claim 3, characterised in that: the number of the power supply modules (3) is four.

5. A high-precision segmented high-frequency switching power supply according to claim 4, characterized in that: the four power supply modules (3) are respectively a 100A power supply module, a 40A power supply module, a 20A power supply module and a 4A power supply module.