Abstract: An illustrative example embodiment of a wireless power transfer device includes an inductor panel and a capacitor panel adjacent the inductor panel. The capacitor panel includes a first conductive plate adjacent one side of the inductor panel, a dielectric layer adjacent the first conductive plate, and a second conductive plate adjacent the dielectric layer on an opposite side of the dielectric layer from the first conductive plate.

Abstract: An illustrative example embodiment of a buck-boost converter includes at least three input/output ports, at least three sets of switches, and at least two ripple current limiters. One of the sets of switches is associated with each of the input/output ports. Each of the ripple current limiters is associated with a respective one of the sets of switches between the associated set of switches and another one of the sets of switches.

Abstract: An illustrative example embodiment of an elevator control system includes a drive configured to control power provided to an elevator machine, a machine power switch module configured to selectively disconnect power from the elevator machine, and a brake power switch module configured to selectively disconnect power from a brake associated with the elevator machine. A monitor module includes a first monitor unit and a second monitor unit. Each monitor unit is configured to monitor a condition of the machine power switch module and the brake power switch module. The monitor units each provide an output to the other monitor unit including a current condition of the machine power switch module and a current condition of the brake power switch module as detected by that monitoring unit. Each of the monitor units is configured to determine whether there is correspondence between the outputs.

Abstract: An illustrative example embodiment of a switch monitoring device includes a controller configured to command a switch to enter at least one of a conducting state and a non-conducting state. A monitoring circuit conducts current when the switch is in the conducting state. A comparator provides an output indicating a relationship between a voltage of a selected portion of the monitoring circuit and a threshold voltage. The controller determines a condition of the switch based on the output of the comparator and the command.

Abstract: An illustrative example embodiment of a wireless power transfer device includes an inductor panel and a capacitor panel adjacent the inductor panel. The capacitor panel includes a first conductive plate adjacent one side of the inductor panel, a dielectric layer adjacent the first conductive plate, and a second conductive plate adjacent the dielectric layer on an opposite of the dielectric layer from the first conductive plate.

Abstract: An illustrative example embodiment of a buck-boost converter includes at least three input/output ports, at least three sets of switches, and at least two ripple current limiters. One of the sets of switches is associated with each of the input/output ports. Each of the ripple current limiters is associated with a respective one of the sets of switches between the associated set of switches and another one of the sets of switches.

Abstract: An illustrative example embodiment of an elevator system includes an elevator car, a first transceiver supported on the elevator car, and a second transceiver in a preselected location where the first transceiver can wirelessly communicate with the second transceiver when the elevator car is situated in a corresponding location. The first transceiver wirelessly communicates with the second transceiver to transfer at least electrical power between the transceivers. An elevator car power storage device is supported on the elevator car. The elevator car power storage device is configured to store electrical power received by the first transceiver from the second transceiver. The elevator car power storage device is also configured to provide power to the first transceiver to be transferred to the second transceiver.

Abstract: A method of controlling a tunable passive component in a pulse width modulation controlled switched mode power supply (SMPS) having a power input and an output with tunable passive component power filter. The method includes operably connecting and supplying power relative to a circuit ground to a DC bus, converting a voltage on the DC bus to an output voltage by operating a first switching device and a second switching device at a selected frequency, and filtering the output voltage with a tunable output filter, the tunable output filter including a tunable passive component responsive to a control function circuit configured to automatically tune the tunable passive component value based on a voltage associated with operation of the power supply to maintain resonance of the tunable output filter at about the selected frequency.

Abstract: A circuit board and a display device are disclosed. The circuit board is configured to be bonded onto a display substrate; the circuit board includes a bonding connection end, which includes a base film and a plurality of first connecting terminals disposed on the base film; regions, which are corresponding to at least part of the first connecting terminals, of the base film comprises a transparent membrane material. The circuit board improves the product quality monitoring level during the bonding process, and decreases the product risks.

Abstract: A three-phase current source rectifier (CSR) with three AC inputs may include a controller, a free-wheeling diode with a cathode connected to a positive line and an anode connected to a negative line, three pairs of switches connected in parallel between the positive line and the negative line, and six pairs of diodes, each pair of the diodes connected in series. Each two pairs of the diodes may be connected in parallel with each other and in series with a respective pair of switches. Each AC input may be connected to between each of two pairs of the diodes.

Abstract: A circuit board and a display device are disclosed. The circuit board is configured to be bonded onto a display substrate; the circuit board includes a bonding connection end, which includes a base film and a plurality of first connecting terminals disposed on the base film; regions, which are corresponding to at least part of the first connecting terminals, of the base film comprises a transparent membrane material. The circuit board improves the product quality monitoring level during the bonding process, and decreases the product risks.

Abstract: A three-phase alternating current (AC) to direct current (DC) converter may include a three-phase AC filter receiving a three-phase AC power supply, a plurality of three-phase current source rectifiers (CSR) connected in parallel with each other and connected to a three-phase AC filter, and an output filter connected to the CSR's to generate a DC output. Each of the CSRs may include six switches and a free-wheeling diode. Each of the three filtered AC inputs from the three-phase AC filter may be connected via a switch of the six switches to selectably send current into a positive line, and each of three filtered AC inputs from the three-phase AC filter may be connected via another switch of the six switches to selectably receive current from a negative line. The free-wheeling diode may have a cathode connected to the positive line and an anode connected to the negative line.

Abstract: A three-phase alternating current (AC) to direct current (DC) converter may include a three-phase AC filter receiving a three-phase AC power supply, a plurality of three-phase current source rectifiers (CSR) connected in parallel with each other and connected to a three-phase AC filter, and an output filter connected to the CSR's to generate a DC output. Each of the CSRs may include six switches and a free-wheeling diode. Each of the three filtered AC inputs from the three-phase AC filter may be connected via a switch of the six switches to selectably send current into a positive line, and each of three filtered AC inputs from the three-phase AC filter may be connected via another switch of the six switches to selectably receive current from a negative line. The free-wheeling diode may have a cathode connected to the positive line and an anode connected to the negative line.

Abstract: A three-phase current source rectifier (CSR) with three AC inputs may include a controller, a free-wheeling diode with a cathode connected to a positive line and an anode connected to a negative line, three pairs of switches connected in parallel between the positive line and the negative line, and six pairs of diodes, each pair of the diodes connected in series. Each two pairs of the diodes may be connected in parallel with each other and in series with a respective pair of switches. Each AC input may be connected to between each of two pairs of the diodes.

Abstract: A three-phase alternating current (AC) to direct current (DC) converter may include a three-phase AC filter receiving a three-phase AC power supply, a plurality of three-phase current source rectifiers (CSR) connected in parallel with each other and connected to a three-phase AC filter, and an output filter connected to the CSR's to generate a DC output. Each of the CSRs may include six switches and a free-wheeling diode. Each of the three filtered AC inputs from the three-phase AC filter may be connected via a switch of the six switches to selectably send current into a positive line, and each of three filtered AC inputs from the three-phase AC filter may be connected via another switch of the six switches to selectably receive current from a negative line. The free-wheeling diode may have a cathode connected to the positive line and an anode connected to the negative line.