Multi-module combined converter with recycling cross rectification function

A module combination and converter technology, which is applied in the conversion devices and instruments for converting DC power input into DC power output and output power, can solve the problem that the accuracy of the system has a great influence on the current sharing, the control system design is more difficult, and the entire The system cannot work normally, etc., to achieve the effect of improving power density and reliability, less additional components, and simplifying control

Inactive Publication Date: 2012-07-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the active current sharing method has many disadvantages: they need to detect the current of each module, and the accuracy of sampling has a great influence on the current sharing of the system, and the accuracy of sampling is affected by the parasitic parameters of the sampling circuit components and the life of the sampling circuit; The control method requires a current-sharing bus, and when the current-sharing bus fails or is disturbed, the entire system may not work normally; the current-sharing controller complicates the control link of the entire system, making the design of the control system more difficult

Method used

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  • Multi-module combined converter with recycling cross rectification function
  • Multi-module combined converter with recycling cross rectification function
  • Multi-module combined converter with recycling cross rectification function

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Embodiment approach

[0022] like figure 2 As shown, as the second embodiment of the present invention, the main circuit of the combined converter includes three half-bridge module circuits with full-wave circular cross-rectification on the secondary side of the transformer. The half-bridge circuit Hp1, the high-frequency isolation transformer T1 and the full-wave rectification circuit re1 form the first circuit module; the half-bridge circuit Hp2, the high-frequency isolation transformer T2 and the full-wave rectification circuit re2 form the second circuit module; The half-bridge bridge circuit Hp3, the high-frequency isolation transformer T3 and the full-wave rectification circuit re3 constitute the third circuit module; the output loops of the rectification circuits re1, re2, re3 are cross-connected to the output filter inductors L1, L2, L3. Since the internal structures of the three circuit modules are the same, for the convenience of explanation, only the internal structure of one of the cir...

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Abstract

The invention discloses a multi-module combined converter with a recycling cross rectification function. The multi-module combined converter comprises a plurality of modules which are connected together, wherein each module consists of a bridge-type circuit, a high-frequency isolation transformer, a rectification circuit and an inductor which are sequentially connected; and the input terminals of the bridge-type circuits in all the modules are connected in parallel, and the output terminals of the inductors are also connected in parallel. The input terminals and the output terminals of the plurality of modules of the combined converter can realize natural flow equalization without current sampling of the modular circuit and a flow equalization control ring, so that the control process is simplified, the reliability and the power density of the combined converter system are improved, and the cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a parallel combination converter of a plurality of direct current converter modules for cyclic cross rectification. Background technique [0002] With the development of science and technology, the voltage and current levels of the power system have been significantly improved, and the requirements for the capacity, power density and reliability of the power system are also getting higher and higher. In the occasions where the input and output voltages are low and the current level is high, the combination of input-parallel-output-parallel (IPOP) has been widely used. This connection method reduces the power level of a single module and the current stress of the power switch tube in the module circuit, and a higher frequency switch tube can be used to reduce the EMI radiation of the circuit. In addition, the input and output ripples of each module circuit c...

Claims

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Application Information

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IPC IPC(8): H02M3/335
Inventor 石健将罗劼程娟
Owner ZHEJIANG UNIV
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