Regardless of whether the energy efficiency of a new or existing process/machine shall be improved, the whole system must always be considered. Existing installations have the advantage that measurements can be made to determine the losses in the installation,…
When selecting frequency converters for your installation, you often have the choice between centralised installation, whereby the frequency converters are installed together in one or more control cabinets, and decentralised installation, whereby the frequency converters are installed…
Load sharing is a concept normally used for referring to a group of motors operating a common load. This approach can be found in long conveyors, extruders, winches and other applications. The whole group of motors can…
Modern frequency converters are intelligent, which enables them to handle many tasks in drive systems. Nevertheless, even now many devices operate with only four data points in a control system or under control of a DDC and act only as speed controllers. This means…
High-frequency common-mode core filters reduce electromagnetic interference and eliminate bearing damage by electrical discharge. High-frequency common-mode (HF-CM) cores are special nanocrystalline magnetic cores which have superior filtering performance compared to regular ferrite cores. They act like a common-mode inductor (between phases and ground).
When selecting a frequency converter, the load conditions of the application should always be taken into account first. A fundamental distinction is made between quadratic and constant load characteristics, which are the most common in practice. When a frequency converter…
