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Positive and negative excitation bidirectional DC-DC converter

A DC-DC, forward and flyback technology, applied in the direction of conversion equipment with intermediate conversion to AC, high-efficiency power electronic conversion, climate sustainability, etc., can solve problems such as limited applications, and achieve small current ripple and continuous current , Avoid the effect of voltage spike problem

Inactive Publication Date: 2004-11-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This technology uses a single-ended flyback converter as the main topology. Its main defect is that it uses a coupled inductor (flyback transformer) to transmit energy, which limits its application in high-power applications.

Method used

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  • Positive and negative excitation bidirectional DC-DC converter
  • Positive and negative excitation bidirectional DC-DC converter
  • Positive and negative excitation bidirectional DC-DC converter

Examples

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Embodiment Construction

[0025] figure 1 It is the schematic diagram of the main circuit of the forward and flyback bidirectional DC-DC converter. Depend on figure 1 It can be seen that the forward and flyback bidirectional DC-DC converter of the present invention is composed of a transformer secondary winding N s1 with primary winding N p1 The same terminal is coupled with each other to form a forward transformer T 1 ; by another transformer secondary winding N s2 with primary winding N p2 The different terminals are coupled with each other to form a flyback transformer T 2 , the two secondary windings of forward and flyback transformers N s1 with N s2 After the different terminals are connected, they are connected to the DC power supply V at the same time. 1 Positive pole, two secondary windings N s1 with N s2 The other end is respectively connected with the switch tube S 1 with S 2 Connected to the DC power supply V at the same time after being connected in series 1 The negative pole o...

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PUM

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Abstract

The invention relates to a forward-flyback two-way DC-DC converter, composing a forward transformer by coupling secondary and primary windings; composing a flyback transformer by coupling another secondary and primary windings, where the two secondary windings are connected in series with the two switches tubes, respectively, and then connected in parallel with a DC power supply. The two primary windings are connected in series and then connected in parallel with a DC power supply through rectifier / inverter. It uses active clamping, RCD clamping, LCD clamping, ZVT and other techniques to compose a family of two-way converter topologies. It uses the forward transformer and a coupling inductance together to transmit energy, solving the defect in using transformer leakage inductance or coupling inductance to transmission energy; avoids the peak problem in current topologies in existing techniques; has the advantages of small current ripple, implementing soft switch for each switch tube, etc.

Description

technical field [0001] The invention relates to a forward and flyback bidirectional DC-DC converter, which belongs to a power electronic converter. Background technique [0002] There are three traditional solutions for isolated bidirectional DC-DC converters: [0003] 1. Phase-shifting bidirectional conversion technology [0004] This technology uses transformer leakage inductance (or external inductance) to complete bidirectional energy transmission through bridge arm phase shifting. It uses leakage inductance to transfer energy, limiting the application of this technology in high-power applications. [0005] 2. Voltage type-current type combined bidirectional conversion technology [0006] This technology is the combined voltage mode-current mode topology, and its main drawback is that the voltage spikes on the switching devices caused by the leakage inductance of the transformer are large. These two drawbacks are caused by the current mode topology contained in this ...

Claims

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Application Information

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IPC IPC(8): H02M3/22H02M3/28
CPCY02B70/1491Y02B70/10
Inventor 张方华严仰光王慧贞龚春英
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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