Mikrowechselrichterschutzschaltung und Mikrowechselrichtertopologieschaltungssystem

Details

Veröffentlichungs-Nr.

EP4773492

Anmeldetag

5. März 2024

Veröffentlichung

6. März 2025

Rechtsraum

EP

Abstract

A circuit for protecting a micro inverter and a circuit system having micro inverter topology. The circuit comprises a current sampling module, a hardware adjusting module, and a shutdown module that are sequentially connected. The current sampling module is configured to collect a first current signal in a bridge arm, in which a switch transistor is located, in secondary-side bridge arm circuitry comprising switch transistors. The hardware adjusting module is configured to receive the first current signal and a reference current signal and output an overcurrent indicating signal for the first current signal. The shutdown module is configured to receive the overcurrent indicating signal and a grid-polarity signal and output a shutdown control signal for the switch transistors, to enable secondary-side driving circuitry to shut down the switch transistors in the secondary-side bridge arm circuitry. Operating states of the switch transistors can be adjusted accurately and timely when overcurrent occurs in the secondary-side bridge arm circuitry, and the switch transistors are reliably protected from damage.

Anmelder

Firma

Sungrow Power Supply Co., Ltd.

Land

🇨🇳 China