Harmonic minimisation with Active PFC

Electric devices or electronic systems with a poor power factor draw more electricity from the grid than operationally necessary. That costs money and, in the worst case, jeopardize the operational reliability of power grids and critical infrastructure.

At ebm‑papst, we highly recommend addressing this problem with active power factor correction (PFC). This technology is integrated into our EC fans and works to prevent interfering harmonic components and stop reactive power.

As a result, on top of allowing your systems to run much more efficiently and reliably, infrastructure components for energy and emergency power supply, e.g. transformers or emergency power generators, can be designed to be smaller and thus more cost-effective.

Operational reliability and efficiency for a variety of applications in data centers.

Current harmonics are generally created every time speed-controlled drives are in operation, whether these are AC/PM motors with a variable frequency drive or EC motors. With our invention of integrating active PFC directly into our fans, we are therefore addressing this problem directly where it is created. The integrated harmonic filter prevents interfering harmonic components and therefore allows for an ideal, linear current draw.

And, as data centers must not run hot, EC fans with three-phase active PFC provide reliable cooling and eliminate the need for excessively large or powerful power supply components. This ensures an even load and safeguards the flow of data.

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The formula for current harmonics

Current harmonics are a burden for the power grid and the budget. Instead of going to great lengths to reduce them, it is best to avoid them altogether.