This disclosure describes techniques to actively balance phase currents across different phases of an alternating current (AC) power line. A phase current for each phase into an equipment is sensed and A phase current difference across the phases is determined. If the difference meets a threshold, rectifier output voltage adjustment with a suitable step size is performed for rectifiers associated with the corresponding phase(s). This process is continued until the phase current in each phase is within the specified imbalance threshold (tolerance), e.g., 1% tolerance of the averaged phase current of the three phases. The techniques can reduce operating costs, e.g., of a data center, that are otherwise incurred due to phase current imbalance.

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.