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BİYOMEDİKAL

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  2. 3KW 24VOLT İNVERTER VINN SESİ

    BİYOMEDİKAL posted a topic in Inverters
    İMAGE3KW 24 VOLT INVERTER FAILURE... 8 MOSFETS AND 2 IGBTs IN THE SYSTEM WERE BURNED OUT. I REPLACED THEM WITH NEW ONES. THE DEVICE IS WORKING, PRODUCING 220 VOLTS NORMALLY, BUT AFTER 10 MINUTES, IT MAKES AN ANNOYING (WINNNNNN) SOUND. THE DEVICE IS NOT GIVING ANY OTHER FAULT INDICATIONS. WHAT COULD BE THE REASON FOR THIS? I CAN'T FIGURE IT OUT. PARTS I REPLACED: IGBT G40T60AK3HD MOSFET NCEP15T14 SG3525 GATE DRIVER, RESISTOR, TRANSISTOR, ZENER DIODES UC3845 INTEGRATED CIRCUITS 2. QUESTION: WHEN TESTING THE IGBT AND MOSFET DRIVERS OF THE DEVICE, AFTER REMOVING THE VERTICAL BOARD, WHICH OPTOCOUPLER'S PINS SHOULD WE SHORT-CIRCUIT AND TEST?IMAGE OR SHOULD WE TEST IT WITHOUT REMOVING IT? CAN SOMEONE PLEASE EXPLAIN HOW THIS IS DONE IN DETAIL WITH PICTURES? I WILL PROVIDE THE NECESSARY INFORMATION, EQUIPMENT, AND HARDWARE AS MUCH AS I CAN. I AM THE OWNER. I CAN SEND VIDEOS AND PICTURES VIA WHATSAPP IF NEEDED. PLEASE HELP.

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