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Forward converter for realizing forward and reverse energy transmission by connecting LCD in parallel at secondary side

A forward conversion and energy transmission technology, which is used in output power conversion devices, DC power input conversion to DC power output, instruments, etc., can solve the problems of low utilization rate of excitation energy, complex circuit composition, and low efficiency. The effect of improving utilization, simple circuit and high energy transmission efficiency

Active Publication Date: 2020-09-18
XIAN MORDA CORE ELECTRONICS TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of low excitation energy utilization rate, complex circuit composition, large loss and low efficiency in the existing magnetic reset circuit

Method used

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  • Forward converter for realizing forward and reverse energy transmission by connecting LCD in parallel at secondary side
  • Forward converter for realizing forward and reverse energy transmission by connecting LCD in parallel at secondary side
  • Forward converter for realizing forward and reverse energy transmission by connecting LCD in parallel at secondary side

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Embodiment Construction

[0038] Such as figure 1 As shown, the secondary parallel LCD of the present invention realizes the forward converter of forward and reverse energy transmission, including the forward converter main circuit 1, and the energy transfer and transmission circuit 2 connected with the forward converter main circuit 1, so The main circuit 1 of the forward converter includes a high-frequency transformer T, a switch tube S, a diode D1, a diode D2, an inductor L1 and a capacitor C1. The positive voltage input terminal IN+ is connected to the positive output terminal of the external power supply, the opposite terminal of the primary side of the high-frequency transformer T is connected to the drain of the switching tube S, and the source of the switching tube S is the main circuit of the forward converter The negative voltage input terminal IN- of 1 is connected to the negative output terminal of the external power supply, the gate of the switching tube S is connected to the output termin...

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Abstract

The invention discloses a forward converter for realizing forward and reverse energy transmission by connecting an LCD in parallel at a secondary side. The forward converter comprises a forward converter main circuit and an energy transfer and transmission circuit; the forward converter main circuit comprises a high-frequency transformer T, a switching tube S, a diode D1, a diode D2, an inductor L1 and a capacitor C1; and the energy transfer and transmission circuit comprises a diode D3, a capacitor C2 and an inductor L2. The forward converter is simple in structure and high in reliability, excitation energy is transferred to a load side, forward energy can be transmitted, the energy transmission efficiency is improved, soft turn-off of a switching tube can be realized, the problem of reverse recovery of diodes D1 and D2 is eliminated, the loss of the switching tube and the diodes is further reduced, and the overall efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of switching power supplies, and in particular relates to a forward converter for realizing forward and flyback energy transmission by connecting LCDs in parallel with the secondary side. Background technique [0002] In many isolated switching power supply conversion topologies, compared with the flyback converter, the power of the forward converter is not limited by the ability of the transformer to store energy; compared with the half-bridge and full-bridge converters, the forward converter As far as it is concerned, it uses fewer components, simpler circuits, lower cost, and higher reliability. [0003] Moreover, since the forward converter circuit has many advantages such as relatively simple structure, low cost, input and output isolation, and high operational reliability, it is more suitable for application in small and medium power electric energy conversion occasions, and has attracted great attenti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/40H02M1/32H02M3/335
CPCH02M1/40H02M1/32H02M3/335H02M1/0051H02M1/0048H02M1/0058H02M1/0054Y02B70/10H02M3/33538H02M1/083H02M3/33553
Inventor 刘树林杨波杨军
Owner XIAN MORDA CORE ELECTRONICS TECHNOLOGY CO LTD
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