DC POWER SUPPLY DEVICE

• Main Authors: FUKUMOTO YOSHIKI, OGAMI YASUYUKI
• Format: Patent
• Language: English
• Published: 23.01.2014
• 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

PROBLEM TO BE SOLVED: To provide a DC power supply device capable of parallel operation of a plurality of DC-DC converters which prevents a difference in output between the plurality of DC-DC converters due to variations of characteristics of circuit elements and a sudden change in a load.SOLUTION: PWM pulse generators 6A, 6B for feeding PWM pulses to switching elements of the DC-DC converters are provided in the DC-DC converters 1, 2, respectively, and a feedback control section 7 common to all the DC-DC converters 1, 2 is provided. The common feedback control section controls the PWM pulse generators disposed for the DC-DC converters to provide the control of keeping an output voltage at a desired value. Output correction sections 12A, 12B for correcting a duty ratio of a PWM pulse set by the feedback control section are disposed for the DC-DC converters 1, 2, respectively, to eliminate a difference in output between the two DC-DC converters.