Without signal transducers and rotation speed monitors - Speed monitoring of frequency regulated electric motors

In industry, the operation of electric motors via frequency converters is already well established. However, time and again, there are applications where, on the part of electric drives, the required safety device against excess rotation speed can only be achieved at great expense (with a signal transducer in combination with a rotation speed pilot switch). This was a problem which a leading manufacturer of machinery for processing solid wood confronted and finally found a simple and effective alternative with ipf electronic.