Abstract: A multiple power supply system includes first and second power supply units. The first power supply unit provides a main output voltage while in a normal mode of operation. The first power supply unit includes a first bulk capacitor, and first standby power circuitry. The first standby power circuitry provides a standby voltage while the first power supply unit is in the normal mode of operation. The second power supply unit provides the main output voltage while in the normal mode of operation. The first power supply unit includes a second bulk capacitor, and second standby power circuitry. The second standby power circuitry provides the standby voltage while the first power supply unit is in the normal mode of operation, and enables reverse charging of the second bulk capacitor by the first power supply unit while the second power supply unit is in a reverse charging mode of operation.

Abstract: An autonomous running working machine that receives power wirelessly fed from a station includes a power reception coil that is provided in the station and is magnetically coupled to a power transmission coil, in which a core of a magnetic substance is inserted, and the power reception coil includes an open portion through which the core passes when the autonomous running working machine enters the station.

Abstract: A wireless power transfer method may include a selection phase of monitoring the placement and removal of an object for an interface surface of the power transmitter, a ping phase of receiving a response from a power receiver by performing digital ping using a first communication protocol, an identification/configuration phase of receiving a configuration packet including configuration information of the power receiver using the first communication protocol, wherein the configuration packet includes power class information of the power receiver and communication protocol information of the power receiver, a negotiation phase of selecting any one of the first communication protocol and a second communication protocol different from the first communication protocol based on the power class information and/or the communication protocol information using the first communication protocol, a calibration phase of improving the ability to detect a foreign object by controlling a specific parameter, and a power transf

Abstract: Apparatuses and systems enable power transfer from one or more energy sources to one or more loads. The input power from the energy sources may be unregulated, and the output power to the loads is managed. The power transfer is based on a dynamic implementation of Jacobi's Law (also known as the Maximum Power Theorem). In some embodiments, the energy sources are selectively coupled and decoupled from the power transfer circuitry. In some embodiments, the loads are selectively coupled and decoupled from the power transfer circuitry. Power transfer to the loads is dynamically controlled.

Abstract: A first power receiving apparatus observes a power transfer signal from a power supply apparatus, and detects whether power transfer is being performed between the power supply apparatus and a second power receiving apparatus. When the power transfer is being performed between the power supply apparatus and the second power receiving apparatus, a waveform of the signal is deformed with a predetermined pattern. The second power receiving apparatus detects deterioration in power which is received from the power supply apparatus and detects whether the waveform of the signal changes with the predetermined pattern within a predetermined time after detecting the power deterioration. When detecting the change in the waveform of the signal with the predetermined pattern, the second power receiving apparatus determines that the first power receiving apparatus is in a power suppliable range of the power supply apparatus.

Abstract: A method, circuit and system arrangement is described for providing rapid de-energization for safety reasons of conductors having a DC power source at both ends. The invention is particularly envisaged for use in solar energy systems in which a battery is charged by solar power from a photovoltaic array, the invention comprising controlling the array to interrupt charge current flow and then isolating the battery from the conductors to be de-energized in a fail-safe manner.

Abstract: A wireless power and data transfer system including a transmitter and a receiver is provided for wirelessly transmitting power from a transmitter to a receiver and wirelessly transmitting data from the receiver to the transmitter. The transmitter comprises a transmitter substrate, a source element forming an inner loop on the transmitter substrate, a plurality of transmitter resonator elements each forming an outer loop on the transmitter substrate; and a plurality of transmitter capacitors connected to the plurality of transmitter resonator elements, respectively. The receiver comprises a receiver substrate, a load element forming an inner loop on the receiver substrate, a plurality of receiver resonator elements each forming an outer loop on the receiver substrate; and a plurality of receiver capacitors connected to the plurality of receiver resonator elements, respectively.

Abstract: A power receiving device 3 of a non-contact power supply device 1 has: a resonant circuit 20 having a receiving coil 21 for receiving power from a power transmission device 2; and a rectifier circuit 24 for rectifying power output from the resonant circuit 20. The power transmission device 2 has: a transmission coil 14 for supplying power to the power receiving device 3; a power supply circuit 10 for supplying AC power having an adjustable switching frequency to the power transmission coil 14; and a control circuit 17 that stops the power supply from the power supply circuit 10 to the transmission coil 14 when the non-contact power supply device 1 does not perform a constant voltage output operation even if the switching frequency is changed over a predetermined frequency range.

Abstract: In accordance with presently disclosed embodiments, a hybrid power conversion system and method are provided. The hybrid power conversion system integrates multiple power sources. An isolated DC/DC converter manages power transfer between the power sources and the DC/DC converter and the power sources are connected such that a full power rating converter is not required. One of the power sources may comprise one or more battery strings, which may be selectively coupled to a DC/AC inverter. In one embodiment, the battery strings may be connected to a lead acid battery. Based on controller instructions, the isolated DC/DC converter replaces the power flow of the lead acid battery with the battery strings. In another embodiment, one or more battery strings may be selectively connected in series with a photovoltaic (PV) panel providing power to a load. When connected to the load, each of the battery strings may provide an incremental step up in power, boosting PV panel power.

Abstract: A system includes multiple hybrid energy storage modules (HESMs) configured to accept constant-current DC input power from a main power source. Each HESM has a plurality of outputs configured to sequentially or simultaneously provide both constant-current and constant-voltage output power to multiple loads, the loads comprising steady state, pulsating, or intermittent loads. Each HESM comprises a combined rotating electrical machine-inertial storage module and electro-chemical storage module configured to generate second power that augments or induces first power derived from the main power source, so as to permit constant power draw or constant current draw from the main power source, wherein the output power comprises the first power and the second power.

Abstract: A system for a non-hybrid/non-electric vehicle includes a high voltage electromagnetic device and a power electronics system. The high voltage electromagnetic device is structured to couple to an engine and generate AC electrical power from the engine. The power electronics system is electrically coupled to the high voltage electromagnetic device. The power electronics system includes an AC-to-DC inverter and a junction box. The AC-to-DC inverter is structured to receive and change the AC electrical power to regulated DC electrical power. The junction box is structured to receive and provide the regulated DC electrical power to a plurality of electrical paths that electrically couple the junction box to a plurality of electrically-powered accessories. The regulated DC electrical power is provided to each of the plurality of electrically-powered accessories based on an electric power consumption need of each respective electrically-powered accessory.

Abstract: A method to reduce harmonics in the electrical output (i.e. voltage and current) of a power plant is provided. The power plant is connected via a point of common coupling with an electrical grid. Converters of the power plant provide respective electrical converter output by an applied pulse-width modulation scheme, which is used in the respective converter. The electrical output of the respective converters is summed to generate the electrical output of the power plant. The electrical output of the power plant is provided via the point of common coupling to the electrical grid. Carrier sideband harmonics, which are generated by the converters, are measured in the electrical output of the power plant. A carrier signal of at least one selected converter is adjusted in its phase until specified and characteristic harmonics in the electrical output of the power plant are reduced below a given threshold.

Abstract: An electric power supply system includes a battery, an electric power receiving apparatus, a switching apparatus, and a control apparatus. The electric power receiving apparatus is coupled to the battery in parallel with a load, and receives and supplies external electric power to the battery. In a load driving mode, the control apparatus sets an electrical connection state of the electric power supply system to a first connection state in which connection of the electric power receiving apparatus and the load to the battery is cut off by the switching apparatus and controls a voltage of the electric power receiving apparatus depending on a voltage of the battery if output electric power of the electric power receiving apparatus is equal to or less than reference electric power, and otherwise sets the electrical connection state to a second connection state in which the connection is allowed by the switching apparatus.

Abstract: A photovoltaic module is presented, which may include a photovoltaic panel and a converter circuit having a primary input connected to the photovoltaic panel and a secondary output galvanically isolated from the primary input. The primary input may be connectible to multiple input terminals within a junction box and at least one of the input terminals may be electrically connected to a ground. The photovoltaic module may include multiple interconnected photovoltaic cells connected electrically to multiple connectors (for example bus-bars). The photovoltaic module may include input terminals operable for connecting to the connectors and an isolated converter circuit. The isolated converter circuit may include a primary input connected to the input terminals and a secondary output galvanically isolated from the primary input.

Abstract: A wireless power transmission system includes a power-supplying device including an electronic oscillator that generates electric power having a frequency of 1 MHz or more and 5 MHz or less, and a power-supplying coil member in which the electric power flows; and a power-receiving device including a power-receiving coil member that is capable of generating electric power based on the magnetic field generating from the power-supplying coil member, wherein the power-receiving coil member is a sheet coil including an insulating layer and a first coil pattern disposed at one side of the insulating layer, the first coil pattern is composed of wires, and the wires are disposed in spaced apart relation from each other with a predetermined space provided therebetween in the radial direction of the first coil pattern.

Abstract: A control system for controlling the power output of a plurality of renewable energy generators, a power network connecting those generators to a Point of Interconnection (PoI) with which the power network is connected to an external power grid, and measurement means configured to measure electrical parameters associated with the Point of Interconnection, wherein the control system is configured to: operate each renewable energy generator to achieve a respective current level at a terminal of the generator that is equal to a current set point; implement, during a grid fault event, a feedback control routine in which the control system: determines a measured value of an electrical parameter at the Point of Interconnection, determines a target value of the electrical parameter; and modifies the current set point based on the measured value and the target value of the electrical parameter.

Abstract: A wireless power transmission system includes a power transmitting device and a power receiving device. The power transmitting device includes: a first inverter circuit to output charging power to be directed to power transmission; a power transmitting antenna; and a first control circuit to control the first inverter circuit. The power receiving device includes: a power receiving antenna; and a trigger application circuit to apply, to detecting power to be supplied to the power receiving antenna, a trigger signal for informing of the power transmitting device of the presence of the power receiving device. Upon detecting the trigger signal, the first control circuit causes the first inverter circuit to begin outputting the charging power.

Abstract: Power is provided from a power source and a status of the power source is signaled by controlling a waveform of an AC voltage generated from the power source. The status may include, for example, a capacity of the power source. In some embodiments, a frequency of the AC voltage may be controlled to signal the status. The power source may include, for example, an uninterruptible power supply (UPS), and signaling a status of the power source may include controlling an inverter of the UPS to signal the status. Related systems are also described.

Abstract: A radiofrequency-powered device such as a wireless passive sensor node, for instance, comprises a radiofrequency energy harvesting circuit configured to be coupled to an antenna to harvest radiofrequency energy captured by the antenna from a radiofrequency signal. The radiofrequency energy harvesting circuit is configured to be coupled to an energy storage component to store therein energy harvested via the radiofrequency energy harvesting circuit. The device comprises user circuitry configured to be supplied with energy harvested via the radiofrequency energy harvesting circuit and to operate in accordance with one of a plurality of configurations as a function of configuration data supplied thereto. A receiver circuit coupled to the radiofrequency energy harvesting circuit is configured to receive a configuration data signal modulating the radiofrequency signal and supply to the user circuitry configuration data extracted from the configuration data signal received.

Abstract: A power receiver includes: a secondary-side resonant coil that includes a resonant coil circuit and receives power from a primary-side resonant coil; a capacitor inserted into the resonant coil circuit; a series circuit including a first switch and a second switch; a first rectifying element having a first rectification direction; a second rectifying element having a second rectification direction; a detection circuit that detects a voltage or a current; a binarization processing circuit that outputs a rectangular wave obtained by binarizing the voltage or the current; a rectangular wave detection circuit that detects a rising or falling timing and a cycle of the rectangular wave; a reference clock generation circuit that generates a reference clock based on the rising or falling timing and the cycle; and a control circuit that generates a control clock used to switch on and off by adjusting a phase or a duty ratio.