Abstract: A wireless charging receiver that includes a first coil, a second coil, and a nanocrystalline sheet is disclosed. The first coil is configured to be located within a recess in the nanocrystalline sheet and is positioned between the second coil and the nanocrystalline sheet. The first coil includes first and second terminals and the second coil includes third and fourth terminals. The first terminal is connected to the third terminal and the second terminal is connected to the fourth terminal to electrically connect the first coil to the second coil. The first coil may be formed of a flexible printed circuit board having a continuous trace or may be formed of litz wire. The first coil may be a hybrid coil with a first portion formed of a flexible printed circuit board having a continuous trace and with a second portion formed of litz wire.

Abstract: A computing device can include a housing, a display secured by the housing, a charging coil included in a back side of the housing, the back side of the housing being on an opposite side from the display, and at least one magnet adjacent to the charging coil.

Abstract: A system and method for determining if a USB port can source sufficient current to charge a rechargeable battery at a predetermined peak current level. Detection circuitry is disposed between the USB port and the battery. The detection circuitry includes a current source that is controlled to provide to the battery an increasing current that is sourced by the USB port. As the source current is increased from an initial value to a predetermined peak current source value, the output voltage of the USB port is monitored. If the USB port output voltage drops below a specified threshold voltage before the current source has ramped to the peak current source value, the load current is removed from the battery and an indication is provided that the USB port cannot provide the specified current. The detection process is then repeated after a specified delay interval.

Abstract: The present invention provides a modulation controller for use with a three phase converter. In one embodiment, the modulation controller includes a three phase modulator configured to provide vector control signals for the three phase converter that generate a common mode voltage. Additionally, the modulation controller also includes a transition modifier coupled to the three phase modulator and configured to provide a shaping function for the vector control signals that extends a transition period of the common mode voltage.

Abstract: An apparatus for clamping voltage on a line at a desired voltage and configured for receiving a test voltage includes: (a) A varistor coupled with the line, manifesting characteristics of a capacitor with first signals exceeding a first frequency and manifesting Zener characteristics establishing a first breakdown voltage with second signals having a frequency less than a second frequency which is lower than the first frequency. (b) A spark gap establishing a second breakdown voltage equal with the desired voltage being coupled with the varistor and a low reference potential. (c) A passive direct current element coupled in parallel with the spark gap between the varistor and the low reference potential and effecting forward biasing of the varistor in the presence of the second signals. The second breakdown voltage is less than the test voltage. The sum of the first and second breakdown voltages is greater than the test voltage.

Abstract: The present invention provides a modulation controller for use with a three phase converter. In one embodiment, the modulation controller includes a three phase modulator configured to provide vector control signals for the three phase converter that generate a common mode voltage. Additionally, the modulation controller also includes a transition modifier coupled to the three phase modulator and configured to provide a shaping function for the vector control signals that extends a transition period of the common mode voltage.

Abstract: A high-speed, solid-state circuit breaker is capable of interrupting high DC currents without generating an arc, and it is maintenance-free. Both the switch and the tripping unit are solid-state, which meet precise protection requirements. The high-speed, solid-state DC circuit breaker uses an emitter turn-off (ETO) thyristor as the switch. The ETO thyristor has an anode, a cathode and first, second and third gate electrodes. The anode is connectable to a source of DC current, and the cathode is connectable to a load. A solid-state trip circuit is connected to the first, second and third gate electrodes for controlling interrpution of DC current to the load by turning off said ETO thyristor.

Abstract: A high-speed, solid-state circuit breaker is capable of interrupting high DC currents without generating an arc, and it is maintenance-free. Both the switch and the tripping unit are solid-state, which meet precise protection requirements. The high-speed, solid-state DC circuit breaker uses an emitter turn-off (ETO) thyristor as the switch. The ETO thyristor has an anode, a cathode and first, second and third gate electrodes. The anode is connectable to a source of DC current, and the cathode is connectable to a load. A solid-state trip circuit is connected to the first, second and third gate electrodes for controlling interrpution of DC current to the load by turning off said ETO thyristor.