VFD & Inverter Technology Blog
Insights on variable frequency drives, inverter applications, selection guides, and industry trends to help engineers and system integrators make better decisions.
Why VFD IGBT Failure? Long Cables & Voltage Spikes Fix
Direct Answer: VFD IGBT Failure and capacitor failure are frequently caused by Voltage Spikes generated from Long Motor Cables (>50m). The…
3 Real Causes of VFD Overvoltage Fault: Static, Aging & Grid
Today, we’re reviewing a fault that trips up even seasoned veterans: the VFD clearly has normal voltage, yet it repeatedly reports…
3 Reasons VFD Won’t Stop at 0Hz & Fixes for 12Hz Start
Today, we’re reviewing a highly perplexing field failure case. An engineer reported an odd phenomenon: when his VFD was shutting down,…
5 Reasons VFD Stops Randomly No Error Code & How to Fix It
Today, let’s revisit a particularly mind-boggling field failure case. Reviewing user comments, I noticed a highly representative phenomenon: After replacing the…
5 Reasons VFD Frequency Not Increasing & How to Fix 5Hz Limit
Today, let’s review a typical on-site failure case. A user reached out for help, reporting a strange issue with his equipment:…
3 Causes of PLC Module Failure & How VFD Harmonics Kill It
Today, let’s discuss the real culprit behind frequent PLC module failures. I just got a call from an old acquaintance complaining…
VFD Input Phase Loss: Why Does Phase Loss Trigger an Undervoltage Alarm? In-Depth Analysis and Single-Phase Operation Techniques
During industrial field commissioning, we often encounter a deceptive fault phenomenon: the VFD clearly experiences input phase loss, yet it triggers…
VFD Motor Failure: The Three Hidden Killers Behind Frequent Burnouts Despite Low Current
In industrial settings, we often encounter a highly deceptive type of VFD motor failure: motors that burn out frequently despite operating…
VFD Overcurrent Fault During Constant Speed Operation: In-Depth Troubleshooting and Solutions
Today we tackle a persistent industrial challenge: VFD overcurrent fault during constant speed operation. Many ask me how to fix VFD…
