Power supply circuit and LED street lamp

• Main Authors: SUN JINGBO, LIU XIUQIAN, LI FANGXIANG, FENG LIDONG
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2014
• 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; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATION

The utility model relates to a power supply circuit and an LED street lamp, belonging to the technical field of power supplies. The power supply circuit comprises a three-phase ac interface, an anti-electromagnetic-interface module, an anti-lightning surge module, a first rectification and filter module, a voltage conversion module and a second rectification and filter module which are successively connected. A three-phase ac is input from the three-phase ac interface, and the three-phase ac has relatively strong electric energy conveying capability, thereby reducing the burden of the power supply network; and the voltage conversion module comprises a switch module, a resonance module and a transformer, resonant current generated by the resonance module is used to enable current phase of a switch tube to lag behind voltage, enable the switch module to realize soft switching, reduce switch loss in the voltage conversion module, and further improve the working efficiency of the voltage conversion module.