Diode test system
A bypass diode in a solar panel is used to prevent hot spots. The primary functions of a bypass diode are to conduct forward and block reverse current. The ZW-BD test system is designed to evaluate the thermal behavior and thermal runaway properties of diodes.
Standards: IEC61215-MQT18, IEC61730-MST07, MST25, IEC62979
The power supply's current output pulse duration is controlled to be less than 1 ms.
The power supply is operated to provide constant current output.
During the pulse current phase, parameters such as pulse current, diode voltage drop, and junction box temperature are collected.
The relationship between VD (diode voltage) and TJ (junction temperature) is automatically simulated using the least-squares method.
The TJ value at 75°C is calculated by obtaining the VD data and the ID=Isc value at 75°C.
All data can be exported in EXCEL format, simplifying data processing and analysis.
The forward volt-ampere characteristics of diodes can be tested.
A fast circuit converter allows for rapid switching between forward and reverse voltage circuits within 10 ms.