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Why is the measured current direction reversed? [Copy link]

In the output short-circuit test of the three-phase inverter bridge circuit, the V-phase upper bridge driving voltage and short-circuit current are measured. According to common sense, the output current is positive when the drive is turned on. However, when the drive is actually measured, the output current is negative. What is the reason? The voltage probe and current probe are clamped correctly, the direction and marking are consistent, and the oscilloscope is not inverted.

These are two pictures with different results.

This post is from Test/Measurement
 
 

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