Seeking help with issues regarding inverters
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I have a question that I can’t figure out, and I’d like to ask everyone for advice. Our company installed variable frequency drives on the reducers. Before the installation, the motor had a power rating of 15 KW, the mixing speed was 63 revolutions per minute, and the actual current consumption was 20 A. After installing the frequency converter, the rotation speed of the mixer was also controlled at 63 revolutions; all other loads and conditions remained the same as before the installation of the frequency converter. Why is the measured current 3A? Doesn’t the book say that energy can only be saved by reducing the speed? Why does the current drop so much when both the speed and load remain unchanged? Could everyone please help explain this?
It reduces the power loss in the reducer transmission.
They say it reduces the power loss in the reducer transmission – can the improvement really be that significant?