Storage medium, as well as two-way resonance circuit charging and discharging current regulating method, device and system

Abstract

The invention provides a storage medium, as well as a two-way resonance circuit charging and discharging current regulating method, device and system, and relates to the field of power electronics. When absolute value of the difference between the current in the positive direction of a first circuit or a second circuit flowing through a two-way resonance circuit and being conducted and 0 is withina preset range, a driving circuit is controlled to drive a first switch tube and a third switch tube contained in the conducted first circuit of the two-way resonance circuit or a second switch tubeand a fourth switch tube contained in the conducted second circuit of the two-way resonance circuit to be cut off, so as to avoid the current zero crossing, prevent the greater phase difference between current and voltage, avoid the generation of reflux power, improve the conversion efficiency and avoid the generation of unnecessary heat, wherein the driving schedule logic of the first switch tubeis consistent with that of the third switch tube, and the driving schedule logic of the second switch tube is consistent with that of the fourth switch tube.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a method, device and system for regulating charge and discharge current of a storage medium and a bidirectional resonant circuit. Background technique [0002] With the continuous consumption of fossil energy and the increasingly serious global environmental pollution, new energy technologies that can achieve energy saving and emission reduction have attracted more and more attention. In the related fields of new energy technology, the bidirectional DC / DC converter that realizes the bidirectional flow of energy plays an important role. The LLC resonant converter can realize the zero-voltage turn-on of the inverter switch and the zero-current turn-off of the rectifier switch. After years of development, it has been widely used in various bidirectional DC / DC converter occasions. [0003] The current bidirectional resonant circuit includes a first switch tube, a second switch tube,...

AI Technical Summary

Problems solved by technology

[0003] The current bidirectional resonant circuit includes a first switch tube, a second switch tube, a third switch tube, and a fourth switch tube on the secondary side, and includes a fifth switch tube, a sixth switch tube, a seventh switch tube, and a fourth switch tube on the primary side. Eight switch tubes, wherein the first switch tube and the second switch tube are located on the same bridge arm, the third switch tube and the fourth switch tube are located on the same bridge arm, the fifth switch tube and the sixth switch tube are located on the same bridge arm, and the seventh switch tube is located on the same bridge arm. The switching tube and the eighth switching tube are located on the same bridge arm. During the charging and discharging process of the bidirectional resonant circuit, the control timings of the on-off states of the first switching tube, the third switching tube, the fifth switching tube and the eighth switching tube are consistent. The control timing of the on-off state of the second switch tube, the fourth switch tube, the sixth switch tube and the seventh switch tube is consistent, and the on-off state of the first switch tube, the third switch tube, the fifth switch tube and the eighth switch tube The control sequence of the off state is consistent with the control sequence logic of the second switch tube, the fourth switch tube, the sixth switch tube and the seventh switch tube. Under the above-mentioned driving sequence control method, during the power conversion process, the system will cause Medium power backflow (circulation loss) is relatively large, especially at light load, which has a serious impact on the conversion efficiency and thermal management of the bidirectional DC / DC converter

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