Battery-Integrated Dual-Winding Magnetic Energy Harvester Supplying a Constant Power DC Load

The paper proposes a novel dual-secondary-winding active magnetic energy harvester (D-AMEH), clamped around a single 50 Hz power line conductor carrying AC currents with time-varying magnitude while supplying a constant power DC load. In order to allow continuous power flow to the load despite intermittent nature of power line current magnitude, an energy storage unit (battery) is integrated into the system via the additional winding, creating AC-coupled fully-isolated hybrid energy system. The D-AMEH continuously operates at its maximum power point, while the battery seamlessly matches the difference between generation and consumption. The revealed findings are accurately supported by simulations and experiments to verify corresponding analytical predictions.