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Current Sensors: How much is the drift?
What does "DC drift" mean? Is it when the measured value starts shifting after 20 seconds? Or when it drifts 20% higher after half an hour?
Phase Shift Correction: It takes two to tango
Phase shift correction in power analysis is like dancing a tango: it takes two – the power analyzer supporting the function as well as a suitable sensor with a known phase delay. If one of them is missing… well… just imagine that tango…
Have you ever experienced more than 100% efficiency?
If your power inverter measurements show an efficiency of more than 100%, or the measured values sound too good to be true, it could mean that either you found the holy grail, or -more likely- that there is a measurement error caused by phase shift. With the introduction of SiC and GaN semiconductors in inverter drives for EVs or DC/DC converters, the switching frequencies have increased considerably, and this makes electrical power measurement more challenging.
Coil loss measurement. Accurate. In seconds.
The increasing deployment of SiC and GaN semiconductors in power electronics lead to higher switching frequencies. As a result, smaller and lighter coils can be used in power converters. This also puts major challenge for measurement technology that you need to improve efficiency. Conventional power analyzers produce inconsistent and even incorrect measurement results when analyzing coil loss at the high switching frequencies. The key to easily obtain accurate and repeatable results is automatic phase shift correction. HIOKI makes this possible by perfectly synchronizing the power analyzer with our current sensors and high voltage dividers.