DC-TO-DC CONVERTER COMPRISING A CURRENT SENSOR ARRANGEMENT

• Main Authors: REISINGER, Erwin, SCHMIDT, Martin
• Format: Patent
• Language: English
• Published: 16.11.2023
• 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; GENERATION

DC-to-DC converter for converting an input direct voltage V1 into at least one variable output direct voltage Vout, comprising at least two switched converter units (2, 2′) each having at least one electronically controllable half bridge (3, 3′), and a control unit (4) which is designed to control the half bridges (3, 3′) in a modulation method with a variable period duration and a variable duty cycle, wherein a dedicated current sensor (6, 6′) is provided in each of the output lines (5, 5′) of the converter units (2, 2′), and the control unit (4) is designed to receive the amperages 12, 12′ of the converter units (2, 2′) measured by the current sensors (6, 6′), and to control the converter units (2, 2′) with duty cycles which differ from one another, in particular to activate individual converter units (2, 2′) with duty cycles which are reduced compared to other converter units (2, 2′), or not to activate these, wherein the output lines (5, 5′) of the converter units (2, 2′) are interconnected after the current sensors (6, 6′) so that the currents of the output lines (5, 5′) are summed, wherein the control unit (4) is designed to calculate the sum current Iout, and that the control until (4) is designed to compare the sum current Iout with the nominal currents IN, IN′ and to activate that converter unit (2, 2′) whose assigned current sensor (6, 6′) has a nominal current which is greater than the sum current Iout, but lies closest to the sum current Iout, or to activate those converter units (2, 2′) the sum of whose nominal currents is greater than the sum current, but lies closest to the sum current, so that the amperages in the output lines (5, 5′) of the activated converter units (2, 2′) are in each case below, but as close as possible to, the nominal current IN, IN′ of the assigned current sensors (6, 6′).