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Magnetic integrated switching power supply capable of realizing low input/output current ripple

A switching power supply, output current technology, applied in the direction of converting DC power input to DC power output, output power conversion devices, electrical components, etc. problem, to achieve the effect of simple structure, strong practicability, and improved power density

Inactive Publication Date: 2018-10-26
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Increasing the inductance and capacitance means increasing the volume and weight of the power supply, and reducing the power density of the power supply

Method used

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  • Magnetic integrated switching power supply capable of realizing low input/output current ripple
  • Magnetic integrated switching power supply capable of realizing low input/output current ripple
  • Magnetic integrated switching power supply capable of realizing low input/output current ripple

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] Such as figure 2 As shown, the present invention discloses a high power density magnetic integrated switching power supply that realizes low input / output current ripple. The magnetic integration module includes an input coupling branch, an output coupling branch and a current ripple canceling branch, and the three branches are coupled to the same magnetic core to achieve the purpose of magnetic integration.

[0016] The magnetic integration module consists of an input inductance L A , output inductance L C and ripple canceling inductance L B Commonly coupled to the same core composition.

[0017] The ripple cancellation branch includes ripple cancellation inductors L connected in series B and storage capacitor C r composition.

[0018] The switching power supply circuit (step-down circuit) also includes a freewheeling diode D, an...

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Abstract

The invention provides a high power density magnetic integrated switching power supply capable of realizing low input / output current ripple. The high power density magnetic integrated switching powersupply comprises a magnetic integrated module composed of an input coupling branch, an output coupling branch and a ripple offset branch. The input coupling branch comprises an input inductor LA and an input capacitor Cin. The input coupling branch comprises an output inductor LC and an output capacitor Co. The ripple offset branch comprises a ripple offset inductor LB and an energy storage capacitor Cr which are connected in series together. The input inductor LA, the output inductor LC and the ripple offset inductor LB are coupled to the same magnetic core. The input coupling branch, the output coupling branch and the ripple offset branch included in the magnetic integrated module are coupled to the same magnetic core to realize the objective of magnetic integration. The characteristicsof input / output current ripple offset and enhancing the power density of the power supply can be realized. The magnetic integrated switching power supply is simple in structure and flexible in designand adjustment and has high practicality.

Description

technical field [0001] The invention relates to a switching power supply, in particular to a magnetically integrated switching power supply with low current ripple. Background technique [0002] In the traditional step-down switching power supply design, in order to ensure that the input current ripple is small, it is necessary to add an additional input filter inductor L in and filter capacitor C in . Increasing the inductance and capacitance means increasing the volume and weight of the power supply, and reducing the power density of the power supply. The structure of the traditional step-down switching power supply is as follows: figure 1 As shown, V in is the input voltage, V out is the output voltage, L is the output inductance, C o Is the output capacitor, and D is the freewheeling diode. . Contents of the invention [0003] In order to solve the problems in the prior art, the present invention provides a high power density magnetic integrated switching power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/14H02M3/156
CPCH02M1/14H02M3/156
Inventor 张东来谷雨张晓峰
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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