Converter circuit with bidirectional synchronization rectification and dead band self regulation

Abstract

The present invention discloses a converter circuit with bidirectional synchronization rectification and dead band self regulation. The circuit comprises a V1 side circuit and a V2 side circuit which are bilaterally symmetrical, the V1 side circuit comprises a MOS tube Q1, a MOS tube Q2, a MOS tube Q3 and a MOS tube Q4, and the V2 side circuit comprises a MOS tube Q5, a MOS tube Q6, a MOS tube Q7 and a MOS tube Q8. The converter circuit with bidirectional synchronization rectification and dead band self regulation provides the scheme that the synchronous rectification technology is controlled in the bidirectional conversion state aiming at the bidirectional DC / DC conversion, the bidirectional synchronous rectification is realized aiming at the LLC topology, the synchronous rectification backward flowing prevention problem under the DC / DC bidirectional conversion is solved, and through adoption of the bidirectional rectification technology, the dead time self regulation is realized so as to solve the problem that the time an LLC dead band area is controlled in the limit state so that the ZVS is not possibly realized. The converter circuit with the bidirectional synchronization rectification and the dead band self regulation realize dead band regulation while realizing bidirectional synchronous rectification backward flowing prevention so as to greatly improve the efficiency and the reliability of the circuit, allow the LLC efficiency to be optimized and improve the EMC problem.

Description

technical field [0001] The invention relates to a converter circuit, in particular to a converter circuit with bidirectional synchronous rectification and dead zone self-regulation. Background technique [0002] The DC / DC converter is used to realize the conversion of different DC voltages. Generally, the traditional DC / DC converter is a one-way conversion and a DC / DC conversion of a non-isolated BUCK-BOOST topology. Now in order to satisfy energy storage and make full use of energy. In terms of vehicle and battery formation, DC / DC bidirectional conversion is in urgent need. Traditional non-isolated DC / DC converters have potential safety hazards due to lack of electrical isolation, so isolated DC / DC bidirectional converters have become the main research object. [0003] In the DC / DC converter, the LLC topology is the most preferred. The LLC topology can realize ZVS in almost the whole range, and the secondary side rectifier tube can realize ZCS when f<fr (resonant frequ...

AI Technical Summary

Problems solved by technology

[0010] This can only realize the DC / DC one-way conversion function, and the adjustment of the dead zone adopts DSP control, which increases the complexity of the control, especially in the case of two-way DC / DC conversion.

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