BUS discharge circuit for photovoltaic inverter

• Main Authors: ZHOU HONGLIANG, HUANG YIWEN, ZHU TINGLI
• Format: Patent
• Language: Chinese; English
• Published: 16.08.2024
• 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; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The utility model discloses a BUS discharge circuit for a photovoltaic inverter, and relates to the technical field of solar photovoltaic inverters. The circuit comprises a control circuit and a discharge circuit. The control circuit comprises a first triode Q1, a first resistor R1 and a second resistor R2, a base electrode of the first triode Q1 is connected with a power supply signal output end VCC, a collector electrode of the first triode Q1 is connected with the positive BUS through the first resistor R1, an emitting electrode of the first triode Q1 is connected with the negative BUS, and the second resistor R2 is connected between the collector electrode and the emitting electrode of the first triode Q1; the discharging circuit comprises a field effect transistor Q2 and a third resistor R3, the grid electrode of the field effect transistor Q2 is connected with the collector electrode of the first triode Q1, the source electrode of the field effect transistor Q2 is connected with the negative BUS, and th