Abstract: A vehicle electronic system having an electronic controller and a power switching device configured to switch between a first power setting and a second power setting. The first power setting includes powering at least one of a plurality of electrically powered accessories with power from an on-board electric power supply. The second power setting includes powering the at least one of the plurality of electrically powered accessories with power from an external power supply thereby preventing the use of electric power from the on-board electric power supply. The electronic controller is configured to electronically operate the switching device to switch between the first power setting and the second power setting such that in response to detection of power from the external power supply, the switching device is switched to the second power mode.

Abstract: A resonant turn-off circuit is provided to disconnect an inadequate power source and transfer a load to an alternate power source. In the circuit, a main switch is turned off before the AC cycle of the power source crosses zero. As a result, the main switch may be turned off quickly to transfer electric power supplied to a load to a second power source. The circuit may include resonant switches, a capacitor, a pre-charging power supply and an inductor. When it is desired to turn off the main switch, a resonant switch is turned off to cause a voltage reversal across the switch.

Abstract: The invention is to a controller for a DC electric motor having a first drive circuit and a second drive circuit that operate in a first state and a second state wherein, in the first state, circuits are connected with terminals input and are responsive to the control signals for receiving a load current and selectively energising winding to create torque in motor. In the second state, circuit is disconnected from terminal such that: circuit is able to be responsive to current for generating a first DC charging current to batteries; and circuit is able to connect with a terminal and be responsive to a second DC charging current for selectively directing an energizing current through winding.

Abstract: A power transmitter according to an aspect of the present disclosure includes a first coil to wirelessly transmit power to a second coil of a power receiver; a converter to receive direct current (DC) power, convert the DC power into alternating current (AC) power, and supply the AC power to the first coil; and a controller to execute power control for causing power supplied to a load to approach desired power. The controller executes frequency control of the AC power and at least one control of phase shift control of the converter and voltage control of the DC power as the power control. When the power supplied to the load cannot be caused to approach the desired power by the frequency control, the controller executes at least one of the phase shift control and the voltage control.

Abstract: A system for omni-orientational wireless energy transfer is described. A transmitter unit has a transmitter resonator with a coil that is configured to be coupled to a power supply to wirelessly transmit power to a receiver unit. A receiver unit has a receiver resonator with a coil coupled to a device load. At least one of the resonators is a non-planar resonator that spans a non-degenerate two-dimensional surface having at least one concave portion.

Abstract: An electric vehicle includes: a motor that is arranged on a first side of front and rear sides of a vehicle; a rechargeable electric source that is arranged closer to a vehicle room than the motor; an inverter unit that includes an inverter which is fixed to the motor and which is configured to control and drive the motor by electric power that is supplied from the electric source; a charge circuit for charging the electric source; and a first unit that is fixed to a vehicle body at the first side of the vehicle, wherein the inverter unit is connected to the electric source by a cable, and the first unit is connected to the electric source by a cable that is independent of the cable which connects together the inverter unit and the electric source.

Abstract: The present invention is directed to an electrical wiring device that includes a housing assembly having a plurality of terminals at least partially disposed therein, the plurality of terminals being configured to be coupled to an AC power source and at least one electrical load, the plurality of terminals being configured to provide the electrical wiring device with regulated AC power in a device energized state. At least one variable control mechanism is coupled to the housing assembly, the at least one variable control mechanism being configured to regulate power to the at least one electrical load by way of a control knob being user settable between a first adjustment stop and a second adjustment stop. A user accessible calibration button is included. At least one series pass element coupled to the at least one variable control mechanism, the at least one series pass element being configured to provide load power to the at least one electrical load in accordance with a user setting of the control knob.

Abstract: A programmable solid-state relay includes a base module; a configuration module; a control voltage module having an energy storage device; a controller module having at least two microcontrollers, each having an internal EEPROM memory and at least one digital timer; and at least one switch module including at least one switching circuit having first and second switching contacts. The control voltage module is adapted to receive an applied control voltage and to permit pre-selection of an activation voltage level and a de-activation voltage level.

Abstract: A movable solar power apparatus may comprise at least a solar panel set electrically connected to a maximum power point tracking system (MPPT). A lithium battery set is electrically connected to a battery management system (BMS) which is adapted to monitor and protect the lithium battery set, and the BMS is electrically connected to the MPPT to enable power generated by the solar panel set to directly charge the lithium battery set. A low potential wake-up circuit has a double-contact relay and a single-contact relay, and the double-contact relay comprises a main contact, a first contact, and a second contact. The main contact is switchably electrically connected to the first contact or the second contact, and the main contact is electrically connected to the BMS while the first contact is electrically connected to the master control circuit, and the MPPT is electrically connected to the BMS under normal condition.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for dynamically tuning circuit elements. One aspect includes a variable capacitance device. The device includes a first capacitor, a first switch, a second capacitor, a second switch, and control circuitry. The control circuitry is configured to adjust respective capacitances of the first and second capacitors by causing a first control signal to be applied to the first-switch control terminal for a duration of time in response to detecting a zero voltage condition across the first switch, and by causing a second control signal to be applied to the second-switch control terminal for the duration of time in response to detecting a zero voltage condition across the second switch.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for dynamically tuning circuit elements. One aspect includes a zero voltage switching device including a switch, a first comparator, a second comparator and a controller. The switch includes a first terminal, a second terminal, and a control terminal. The first comparator includes a first input terminal electrically connected to the second terminal of the switch and a second input terminal electrically connected to the first terminal of the switch. The second comparator includes a first input terminal electrically connected to a reference voltage and a second input terminal electrically connected to the control terminal of the switch. The controller is configured to: detect a zero voltage condition across the switch, and, in response, cause a control signal to be applied to the control terminal of the switch.

Abstract: Disclosed herein are methods and systems for adjusting the power level of an external reader of an electronic device. The external reader transmits power to the electronic device with a radio frequency electromagnetic signal. The electronic device may rectify the radio frequency electromagnetic signal and create a rectified voltage. The rectified voltage may be positively correlated to the power level transmitted by the external device. The rectified power can be used to power a component of the electronic device, such as a component configured to measure either a voltage or power associated with the rectified voltage. The electronic device may communicate the measured voltage or power back to the external reader. Based on the communicated voltage or power, the external reader may adjust its power level of the transmitted power.

Abstract: A latching relay may be shown and described. The latching relay may use a reed switch, a permanent magnet and a coil. The permanent magnet may be magnetized by pulsing current through the coil, and demagnetized by degaussing current. Also, the magnetized magnet may maintain an activated state of the reed switch, and the demagnetized magnet may maintain a deactivated state of the reed switch.

Abstract: A power supply apparatus includes a power supply unit that wirelessly supplies power to an electronic apparatus, a communication unit that performs a wireless communication with the electronic apparatus, and a control unit that controls a timing for switching a communication process performed by the communication unit and a power supply process performed by the power supply unit.

Abstract: According to one aspect, embodiments of the invention provide a power circuit comprising an input to receive input AC power from an AC source, an auxiliary charger configured to convert the input AC power from the input into DC power, a differential amplifier configured to be powered by the DC power from the auxiliary charger, to monitor the input AC voltage level of the input AC power, and to generate a sense signal based on a status of the input AC voltage level, and a processor coupled to the auxiliary charger and the differential amplifier, the processor configured to be coupled to an LPS, to be powered into a low power mode by the DC power from the auxiliary charger, and to analyze the sense signal from the differential amplifier in the low power mode of operation. According to one embodiment, the auxiliary charger is an offline DC-DC converter.

Abstract: Disclosed are various embodiments of power source redundancy in a power supply for a rack mounted computing device. The power supply includes a plurality of AC power converters configured to receive power from corresponding power sources. A first AC power converter provides DC power to a common DC bus of the power supply. A second AC power converter provides DC power to the common DC bus in response to a change in the voltage level provided by the first AC power converter.

Abstract: Drivers (1-10) for driving load circuits (100) comprise supply circuits (1) for providing supply current signals from a mains source to the load circuits (100), storage circuits (2) for storing energy destined for the load circuits (100), and switch circuits (3-8) coupled with the storage circuit (2), the load circuit (100) and the supply circuit (1), and for switching the coupling among the storage circuits (2), the load circuit (100) and the supply circuit (1). The switched storage circuits (2) can, in charge states, be charged via the supply current signals, and in bypass states be bypassed, and in dependent discharge states be discharged via the load circuit (100) together with the supply current signals, and in independent discharge states be discharged via the load circuits (100) independently from the supply current signals for a substantial time duration.

Abstract: Disclosed in a stand-alone micro-grid autonomous control system including: at least one battery system directly changing a reference frequency thereof according to a charge amount, and providing power having the changed reference frequency; at least one power generator measuring the reference frequency from the power provided form the at least one battery system, and starting generating power or stopping generating power based on the measured reference frequency; and at least one load measuring the reference frequency from the power provided from the battery system, and performing a synchronization operation or a synchronization releasing operation based on the measured reference frequency.

Abstract: An electrical power system includes a cluster of electrical power subsystems, each of the electrical power subsystems including a power converter electrically coupled to a generator having a generator rotor and a generator stator. Each of the electrical power subsystems defines a stator power path and a converter power path for providing power to the power grid, the converter power path including a partial power transformer. Each of the electrical power subsystems further includes a low voltage distribution panel electrically coupled to the converter power path, a first switch on the stator power path, and a second switch on the converter power path.

Abstract: An LED security light includes a power supply unit comprising a first power source, a second power source and a power switching circuitry, wherein the power switching circuitry utilizes a detector to detect an available electric power in the first power source or in the second power source, and operates with the available electric power detected as a criterion to selectively connect an LED load to at least one of the first power source and the second power source for performing an illumination mode in responding to signals generated by a light sensing unit, a motion sensor unit, or at least one external control unit. In an exemplar, the first power source is an AC power source or a solar power module, and the second power source is a battery unit or a rechargeable battery module.