Photovoltaic optimizer

• Main Authors: YANG QUANDONG, CHEN ZHUO, LIN QIANGQIANG
• Format: Patent
• Language: Chinese; English
• Published: 12.09.2023
• 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

The utility model provides a photovoltaic optimizer, comprising a four-switch buck-boost circuit, the four-switch buck-boost circuit comprises two normal power supplies, two isolation power supplies, a buck-boost sub-circuit composed of MOS tubes Q1 to Q4, two PWM signal sources, isolation drivers U1 to U2, and Schottky diodes D5 to D6; the isolation driver U1 is connected with a normal power supply, one end of the buck-boost sub-circuit and a PWM signal source, and is also connected with an isolation power supply by being reversely connected with the Schottky diode D5; the isolation driver U2 is connected with another normal power supply, the other end of the buck-boost sub-circuit and another PWM signal source, and is also connected with another isolation power supply through a reverse connection Schottky diode D6; when two normal PWM signals exist, the isolation drivers U1 to U2 output two common-ground driving signals and two paths of isolation driving signals so as to drive the MOS tubes Q1 to Q4 to be c