Abstract: A secure, reliable and simplified control mechanism for operating an inverter is provided. In particular, a mechanical switch is used for connecting a local grid with a public grid and for disconnecting the local grid from the public grid. The mechanical switch comprises an intermediate position. Each time when the switch is in this intermediate position, the inverter is immediately shut down in a fast shutdown operation.

Abstract: A filter that can make a reflection delay of an initial stage coupling part correspond to a change in a passband due to a manufacturing error of a substrate or the like is realized. A filter according to an example embodiment includes: a substrate having a dielectric property; an initial stage coupling part formed on the substrate; and an interstage coupling part formed on the substrate. The initial stage coupling part is formed so that a reflection delay is decreased in accordance with an increase in a passband due to a manufacturing error of the substrate or the interstage coupling part, or so that the reflection delay is increased in accordance with a decrease in the passband.

Abstract: Active electromagnetic shielding for dynamic high power wireless charging and related electrified roadway systems, method, and wireless power transmitters is disclosed. A wireless power transmitter includes a first canceling coil offset from a power transmission coil, a second canceling coil offset from the power transmission coil, and circuitry electrically connected to the first canceling coil and the second canceling coil. The circuitry is configured to deliver canceling currents to the first canceling coil and the second canceling coil to destructively interfere with portions of electromagnetic fields generated by the power transmission coil.

Abstract: A wireless power reception circuit system includes a wireless power reception circuit, an electric storage device, a load unit, a digital control circuit, a voltage conversion circuit, a DC-DC converter, smoothing capacitors, a voltage OR circuit, and an external signal setting circuit for resetting the digital control circuit. An enable signal input terminal of the voltage conversion circuit is in a disabled state when the voltage conversion circuit is not controlled by the digital control circuit. The digital control circuit supplies an enable signal to the enable signal input terminal of the voltage conversion circuit when operating the voltage conversion circuit.

Abstract: A transition unit providing a radio frequency signal transition between a radio frequency hollow waveguide system and a planar transmission line comprises two or more transition sections of transmission line arranged adjacent to each other at a first surface of the first substrate layer of a substrate layer arrangement. The hollow waveguide system comprises a distribution section. One input waveguide is separated into one dedicated output waveguide for each of the transition sections. For each of the transition sections of the transmission lines a corresponding end section of a respective output waveguide is directed perpendicular to the first surface of the first substrate layer. For each end section an open end of the end section of the waveguide system superposes the corresponding transition section. The two or more end sections are arranged adjacent to each other in order to provide for favorable boundary conditions for electromagnetic wave propagation.

Abstract: A power reception apparatus wirelessly receives power from a power transmission apparatus, measures a value corresponding to received power in a first period in which the power transmission apparatus limits power transmission, measures, in a second period, a value corresponding to received power used to detect an object different from the power transmission apparatus and the power reception apparatus based on a relationship between a value corresponding to transmitted power in the power transmission apparatus and a value corresponding to the received power in the power reception apparatus, controls a timing of the second period such that the first period and the second period do not overlap.

Abstract: A coupling-type single-pole double-throw (SPDT) switch adapted for a radio frequency integrated circuit includes an input port, a first output port, a second output port, a multi-coupling-coil circuit and a transistor-based control circuit. The multi-coupling-coil circuit includes coils respectively connected with the input port, the first output port and the second output port. The transistor-based control circuit includes a first control circuit, a second control circuit and a third control circuit, and configured to control an input load of the multi-coupling-coil circuit using a control level of the first control circuit and realize connections between the input port and the first output port as well as the second output port using control levels of the second control circuit and the third control circuit. Therefore, the coupling-type SPDT switch can achieve a simple switching between two working states, and have low insertion loss and high isolation degree in both working states.

Abstract: A waveguide component for an orthomode junction or an orthomode transducer includes a common waveguide with a longitudinal direction, the common waveguide includes at least a first portion and a second portion with different cross-sections, and two coupling probes, each arranged orthogonally to the longitudinal direction. The coupling probes are further arranged to couple to different polarization components of an electromagnetic field present in the common waveguide. The second portion of the common waveguide has a cross-section with at most two-fold rotational symmetry.

Abstract: A thermal power unit-flywheel energy storage cooperative frequency regulation control method and system is provided, which belongs to the technical field of a power grid. First, a real-time output increment of a thermal power unit is predicted, then a real-time frequency regulation power instruction of a flywheel energy storage system is determined based on the predicted real-time output increment of the thermal power unit, and finally the frequency regulation power instruction of the thermal power unit is determined by a difference adjustment coefficient of a governor and a grid frequency deviation. The thermal power unit and flywheel energy storage system is cooperatively controlled by frequency regulation based on the real-time output increment predicted value of the unit, which realizes self-adaptive adjustment of output of the flywheel energy storage system under dynamic working conditions, and improves the grid frequency stability and operation safety of the thermal power unit.

Abstract: A circuit is disclosed, comprising: an inverter comprising first and second inverter transistors, each having: a gate terminal connected in common to a drive node, a source terminal, connected to respective first and second voltage rails, and a drain terminal connected to a common first resistor, wherein an inverter output node is connected between the first resistor and the drain terminal of a shorting one of the transistors; a tying transistor connected between the drive node and the voltage rails to which the shorting transistor is connected; a biasing circuit connected to the tying transistor's control terminal and configured to be controlled by a local drive signal and bias the tying transistor control terminal to a voltage such that the tying transistor ties the drive node of the relevant voltage rail in response to the drive signal having a first state; and a circuit for providing the local drive signal.

Abstract: A wireless power transmission apparatus comprises: a plurality of transmission coils configured to transmit a wireless power to a wireless power reception apparatus; a shielding coil which is arranged on at least one surface of a dielectric substrate, and is configured in a loop shape having at least two turns so as to surround the plurality of transmission coils; and a capacitor configured to connect one point to the other point of the shielding coil. The plurality of transmission coils are arranged inside the shielding coil disposed on the dielectric substrate, and the direction of a magnetic field formed at one side and the other side of the plurality of transmission coils adjacent to the shielding coil is formed to be opposite to the direction of a magnetic field formed around the shielding coil so that the shielding coil shields external exposure of electromagnetic waves by the plurality of transmission coils.

Abstract: The present disclosure relates to circuitry for driving a load. The circuitry comprises: primary driver circuitry coupled to a primary signal path and operable to drive the load with a playback signal in a first mode of operation of the circuitry, wherein a playback signal comprises a signal that drives the load to generate a desired output; auxiliary driver circuitry coupled to an auxiliary signal path; an auxiliary current sense resistor in the auxiliary signal path; and current detection circuitry coupled to the auxiliary current sense resistor and configured to generate a signal indicative of a current through the load. One of the primary driver circuitry and the auxiliary driver circuitry is operable to drive the load with a pilot signal in a second mode of operation of the circuitry, wherein a pilot signal comprises a signal having a predefined frequency or frequency content and a predefined magnitude.

Abstract: An aircraft has a first antenna arrangement, a payload and a processing unit. The first antenna arrangement is designed to wirelessly receive electromagnetic signals. The processing unit is coupled to the first antenna arrangement, on the one hand, and to the payload, on the other hand. The processing unit is designed to modulate an electromagnetic signal received by the first antenna arrangement and thereby to generate a first modulated signal and to forward it to the payload. The payload is designed to use the first modulated signal as working signal. A radiofrequency power signal on an uplink is thus remodulated into a payload working signal, such that the payload working signal is able to be used directly by the payload without rectification into a DC voltage.

Abstract: Provided are a to-be-charged device, a wireless charging device, and a wireless charging method. The to-be-charged device includes a battery, at least two wireless receiver circuits, and a control circuit. Each of the at least two wireless receiver circuits is coupled to the battery, and is configured to receive an electromagnetic signal transmitted by a wireless charging device, and convert the electromagnetic signal into a charging current for charging the battery. The control circuit is coupled with each of the at least two wireless receiver circuits, and is configured to, in various charging stages or in different charging modes, control at least one of the at least two wireless receiver circuits to charge the battery.

Abstract: Systems and methods for providing harvested energy to a wireless sensor bundle are disclosed. The method may include: receiving, at a harvesting manager circuit, power from an energy harvesting device; transferring power from the harvesting manager circuit to an energy storage device; receiving, at a power distribution manager circuit, power from the energy storage device; transferring power from the power distribution manager circuit to a wireless sensor bundle, the wireless sensor bundle comprising at least one sensor, and the amount of power distributed to the wireless sensor bundle being based on a power demand of the at least one sensor; wherein the power from the energy harvesting device includes power generated from an AC phase harvesting device, the AC phase harvesting device includes an inductor attached to a feed wire of one phase of an electric actuator, the inductor generating an electric current by induction from the feed wire.

Abstract: A control unit for generating a plurality of synchronized radio frequency (RF) output signals (RFout,i) each having a respective output frequency (fi), phase (?i), and amplitude (Ai), including a signal comparator configured to compare a reference signal having a reference frequency (fref) and a reference phase (?ref) with a feedback signal having a feedback frequency (fPLL) and a feedback phase (?PLL), and configured to generate an error signal representative of a difference between the reference signal and the feedback signal; and a data processing unit receiving as an input signal the error signal generated by the signal comparator, and outputting a plurality of waveform tuning signals (FTWPLL, FTWi) as a function of the error signal; wherein a plurality of waveform generators (DDSPLL, DDSi) each receiving at least one of the plurality of waveform tuning signals (FTWPLL, FTWi) output by the data processing unit, wherein each waveform generator (DDSPLL, DDSi) generates a time-dependent amplitude signal (

Abstract: This application provides an uninterruptible power system and a driving method for an uninterruptible power system, and relates to the field of power conversion technologies, to resolve output interruption of the uninterruptible power system. The uninterruptible power system includes a first power input end, a second power input end, a load end, and a bypass, where the bypass includes a first bidirectional switch, and the first bidirectional switch is connected to the first power input end and the load end, and is configured to control connection or disconnection between the first power input end and the load end; and at least one main circuit, where each main circuit includes a bus and an inverter output unit. An input end of the bus is connected to the second power input end, and an output end of the bus is connected to the inverter output unit.

Abstract: In some aspects of the present disclosure, a bandgap reference circuit includes a first current mirror and a first resistor coupled to the first current mirror to provide a proportional to absolute temperature (PTAT) voltage. The circuit includes a second current mirror and a bipolar junction transistor (BJT) device coupled to the second current mirror to provide a complementary to the absolute temperature (CTAT) voltage. The circuit includes an output node to provide a bandgap voltage that is a weighted sum of the PTAT voltage and the CTAT voltage. The circuit includes a second resistor coupled between the output node and a first node, wherein the first node is coupled between the first resistor and the first current mirror. The circuit includes a third resistor coupled between the output node and a second node, wherein the second node is coupled between the BJT device and the second current mirror.

Abstract: A Wilkinson power divider includes an input line, a first branching line and a second branching line branching from the input line, a first output line coupled to a first end of an output side of the first branching line, a second output line coupled to a second end of an output side of the second branching line, a first stub coupled to the first end, a second stub coupled to the second end, an isolation resistor coupled between the first stub and the second stub, and a circuit branching from a first point between two ends of the first stub, and a second point between two ends of the second stub, and coupling between the first point and the second point. At least a portion of the first stub, at least a portion of the second stub, and the first circuit form a resonant circuit.

Abstract: A wireless power receiving system includes: a power receiving device having a power receiving coil configured to receive electric power supplied wirelessly from a power transmission coil of a power transmission device installed on a road surface, at least part of the power receiving coil being contained in a vehicle wheel; and in-vehicle devices installed in a mobile object, the in-vehicle devices being energizably connected to the power receiving device. The power receiving device transmits the received electric power to the in-vehicle devices.