【実基板で故障診断】11枚の壊れたインバータ基板、原因を全部解明！ モーターは回せるか？

Eleven inverter boards have stopped working. The way they've failed is completely different. Power supply short circuit, MOSFET failure, op-amp overheating, voltage abnormalities, gate drive IC failure… And, surprisingly, some boards aren't actually broken? Using a multimeter, DC regulated power supply, oscilloscope, and thermal camera, we'll use these four tools to unravel the cause of failure in all eleven boards, starting from the upstream. "When your board stops working, where should you start troubleshooting?" This video shows you the procedure with various examples. ━━━━━━━━━━━━━━━━ ■ Table of Contents (Chapters) ━━━━━━━━━━━━━━━━ 00:00 Incident Occurs: 11 Broken Circuit Boards 01:55 Circuit Diagram and Investigation Strategy 02:55 Investigation ① Searching for Power Short Circuits with a Tester 07:57 Investigation ② Searching for Heat with a Regulated Power Supply and Thermal Camera 12:23 Investigation ③ Searching for Voltage Abnormalities with a Tester 14:10 Investigation ④ Searching for Gate Signals with an Oscilloscope 16:35 Twist: The Truth About the Unbroken Circuit Boards 17:51 Summary of the Fault Map 18:45 Will the Motor Turn After Repair? 20:20 Summary ━━━━━━━━━━━━━━━━ ■ Fault Diagnosis Procedure (Review) ━━━━━━━━━━━━━━━━ ① ① Use a multimeter to check for short circuits in the power supply. ② Turn on the power and check the current value; if it's high, use a thermostat to detect heat. ③ Measure the voltage at each point using a multimeter. ④ Use an oscilloscope to check the switching of the gate signals. Start from the point with the highest voltage, and proceed from upstream to downstream. ━━━━━━━━━━━━━━━━ ■ Tools and Equipment Used ━━━━━━━━━━━━━━━━ • Digital Multimeter (Tester): HIOKI DT4252 • Oscilloscope: YOKOGAWA DLM2024 • DC Regulated Power Supply: KIKUSUI PMX18-2A • Thermal Camera: HIKMICRO Pocket2 Thermal Imaging Camera *Power IC on the board: 12V generation LM5010ASD / 5V generation ZLDO1117G50TA ━━━━━━━━━━━━━━━━ ■ About This Board ━━━━━━━━━━━━━━━━ This is an inverter board used by students in experiments at the Power Electronics Laboratory, Meiji University. This time, we are using a board that has actually failed as our subject. ━━━━━━━━━━━━━━━━ ■ Related Videos ━━━━━━━━━━━━━━━━ ▼ 3 Ways to Find Malfunctions and Faults in Electrical Circuits and Circuit Boards with a Tester    • 電気回路・基板の不具合や故障をテスターで見つける3つの方法をわかりやすく解説   ▼ 3 Ways to Remove Surface Mount ICs    • はんだごて2本だけ！表面実装ICを基板から外す最強テクニック3選【パッド破損ゼロ】   ━━━━━━━━━━━━━━━━ #Troubleshooting #CircuitBoardRepair #Tester #Inverter #ElectronicsProjects #Oscilloscope #ThermalCamera #PowerElectronics #ElectricalCircuits