Multiphase current-sharing controlled parallel-connection adjusting circuit and control method

A technology of adjusting circuit and flow control, applied in the direction of conversion equipment with intermediate conversion to AC, can solve the problem of beat frequency, difficult to filter low-frequency harmonics, current ripple cannot be effectively reduced, etc., to improve reliability. , High efficiency power density, the effect of reducing the volume of magnetic components
CN103248231AActive Publication Date: 2013-08-14SHANGHAI ELECTRIC POWER ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI ELECTRIC POWER ELECTRONICS
Publication Date
2013-08-14

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Abstract

The invention relates to the field of direct current (DC) / DC conversion and rectification, and aims to provide a multiphase current-sharing controlled parallel-connection adjusting circuit and a control method. The circuit comprises n phases of adjusting circuits connected in parallel, the structure of each phase of the adjusting circuits are identical; each phase comprises a main transformer and an auxiliary transformer; a primary side winding of the master transformer and a primary side winding of the auxiliary transformer in each phase of circuits are connected in series and then connected in parallel to two ends of an equivalent alternating input power supply PN; secondary side windings of the main transformers in two outputs penetrate through the rectification circuit and then are directly connected to the right end of a current device output side, and the other end is grounded; a secondary winding of the auxiliary transformer in another circuit penetrates through the rectification circuit and then is connected to the input end of a DC-DC converter, and the output end of the DC-DC converter is connected in parallel to the current device output side. Current sharing among multipath transformers is achieved by controlling the balance of power of a small-power DC-DC module; the feedback is realized on a secondary side, the feedback signal can be transmitted to a primary side without isolation, and the system reliability is improved.
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Description

technical field

[0001] The invention belongs to the field of DC / DC conversion and rectification, and relates to a parallel adjustment circuit capable of realizing multi-phase current sharing and a control method thereof. More specifically, the present invention relates to a multi-phase parallel adjustment circuit, which can realize the current sharing of the whole circuit by controlling the current of the parallel-connected low-power modules. Background technique

[0002] Multi-phase interleaved parallel technology can reduce output current ripple, reduce output capacitor volume, optimize heat and power distribution, and has been widely used in medium and high power applications. However, due to the deviation of the circuit load characteristics and the control parameters, the current deviation of the two or more loads will be caused, and the current ripple cannot be effectively reduced. Therefore, it is necessary to increase the current sharing measures to ensure the current...

Claims

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