Abstract: Impedance balancing of isolated converters to reduce common mode (CM) electromagnetic interference (EMI) noise over a wide frequency range. An impedance balanced isolator converter circuit comprises a plurality of resistor, inductor, and capacitor (RLC) branches (i) that are representative of a transformer circuit component, (ii) that are coupled in series with a plurality of respective noise source voltages, and (iii) comprise RLC parameters that are based on respective ones of a plurality of impedances associated with the transformer circuit component; a load impedance branch (i) that is representative of one or more transformer primary side circuit components and (ii) that is coupled in parallel with the plurality of RLC branches and the plurality of respective noise source voltages; and an RLC balance branch coupled in parallel with a first resistor, a first inductor, and a first capacitor that are associated with a first of the plurality of RLC branches.

Abstract: A method for a direct current (DC) islanding detection based on positive feedback of a bus voltage at a specific frequency, essentially including three steps: extraction of a specific frequency component of the bus voltage, injection of a disturbance component of the specific frequency, and determination of DC islanding. The extraction of the specific frequency component of the bus voltage and the injection of the disturbance component of the specific frequency constitute a positive feedback mechanism in a power management unit control loop. In a grid-connected mode of a DC grid, the positive feedback mechanism fails due to a control action of a voltage management unit on a bus, and the bus voltage remains stable. In an islanding mode of the DC grid, under an action of the positive feedback mechanism, the power management unit allows the bus voltage to generate a self-excited oscillation at the specific frequency.

Abstract: A transformer is provided. The transformer includes a core; a primary winding including a first wire and a second wire electrically connected in series, where the first wire and the second wire are bifilar-wound around the core; and a secondary winding including a third wire wound around the core.

Abstract: A device for multiplexing a wireless charging (WLC) coil for near-field communication (NFC) is provided. The device includes: the WLC coil with a first end, a second end, and a first contact point located between the first end and the second end; a first terminal connected with the first end of the WLC coil; a second terminal connected with the second end of the WLC coil; and a third terminal connected with the first contact point of the WLC coil, where the first terminal of the WLC coil is configured to be a first WLC terminal; the third terminal of the WLC coil is configured to be a first NFC terminal; and the second terminal of the WLC coil is configured to be multiplexed as a second WLC terminal and a second NFC terminal.

Abstract: A method for a direct current (DC) islanding detection based on positive feedback of a bus voltage at a specific frequency, essentially including three steps: extraction of a specific frequency component of the bus voltage, injection of a disturbance component of the specific frequency, and determination of DC islanding. The extraction of the specific frequency component of the bus voltage and the injection of the disturbance component of the specific frequency constitute a positive feedback mechanism in a power management unit control loop. In a grid-connected mode of a DC grid, the positive feedback mechanism fails due to a control action of a voltage management unit on a bus, and the bus voltage remains stable. In an islanding mode of the DC grid, under an action of the positive feedback mechanism, the power management unit allows the bus voltage to generate a self-excited oscillation at the specific frequency.