Parallel connection structure for switching power supplies

• Main Authors: YANG YUQIU, XIAO YANYI, LIN YONGWANG
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2014
• 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

The utility model discloses a parallel connection structure for switching power supplies. The switching power supplies are connected in parallel and are all digital power supplies. The digital power supply comprises an air switch, an EMC filter, a rectifier bridge, a half-bridge circuit and a DSPIC single-chip microcomputer. An input terminal of the EMC filter is connected with an input power supply through the air switch, and an output terminal of the EMC filter is connected with an input terminal of the half-bridge circuit through the rectifier bridge. The DSPIC single-chip microcomputer performs output voltage sampling and output current sampling at an output terminal of the half-bridge circuit, and outputs a PWM signal to a control terminal of the half-bridge circuit so as to control the half-bridge circuit to carry out conversion of constant voltage output and constant current output. According to the parallel connection structure provided by the utility model, all the switching power supplies are enable