Control framework of DC/DC convertor, modulation strategy

• Main Author: LYU YONGJIE
• Format: Patent
• Language: English
• Published: 04.02.2015
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention relates to a control framework of DC/DC convertor, a modulation strategy, and the control framework comprises a modulation unit, and a DC/DC convertor group composed of a plurality of DC/DC convertors connected together in a parallel mode; each output end of the modulation unit is connected to the control end of the switch tube of each DC/DC convertor, and is applied to generate the multiple complementation modulating signal used for controlling the switch tube for orderly opening and closing in a modulating period; the control framework of DC/DC convertor and the modulation strategy can greatly raise photovoltaic high voltage input, low voltage output energy utilization efficiency, the DC/DC module is increased, the power element MOS and IGBT requests big current input at the original low voltage output status, the element cost is greatly increased. After raising the output voltage, the request to the input current for the MOS and IGBT is reduced and the element cost of the DC/DC convertor is reduced.