A high voltage pulse generation device includes n transformer cores configuring a transformer, n being a natural number of 2 or more, each of the n transformer cores being configured to form a magnetic circuit along a first plane and to have a width in a first direction parallel to the first plane larger than a width in a second direction parallel to the first plane and perpendicular to the first direction; n primary electric circuits of the transformer connected in parallel to each other, each of the n primary electric circuits including at least one primary coil, and m pulse generation units connected in parallel to the at least one primary coil, m being a natural number equal to or more than 2; and a secondary electric circuit of the transformer including a secondary coil and connected to a pair of discharge electrodes.

A wireless power transmitter according to various embodiments comprises: a power transmission antenna array capable of transmitting power in a wireless manner; a driving circuit for mechanically adjusting the steering direction of the power transmission antenna array; and a processor, wherein the processor can be configured so as to determine the direction in which an electronic device is positioned, control the driving circuit such that the driving circuit mechanically adjusts the steering direction of the power transmission antenna array when the direction in which the electronic device is positioned is not included in a coverage corresponding to the steering direction of the power transmission antenna array, and control the power transmission antenna array such that the power transmission antenna array transmits the power to the electronic device.

The parking assistance method includes: measuring a first received voltage generated in a receiving coil; and assisting alignment between coils by presenting to a vehicle occupant a result of having determined whether or not power can be supplied on the basis of a potential difference previously obtained and the first received voltage. The previously obtained potential difference is a potential difference between a second received voltage of the receiving coil measured when the alignment between the coils is executed before assisting the alignment between the coils, and a third received voltage of the receiving coil measured after the alignment and the power supply are completed.

An inductive power transfer (IPT) converter has a first switching means adapted to produce a time varying input power signal comprising a substantially unipolar stepped waveform, and a second switching means adapted to modify the time varying input power signal provided by the first switching means to produce a modified input power signal. The converter is coupled to a resonant circuit to receive the modified input signal.

A data demodulating circuit includes a sensing circuit sensing a power signal applied to a coil at first and second times, and outputting an analog value representing a difference in voltage of the power signal at the first and second times. An analog-to-digital converter digitizes the analog value output by the analog voltage differential sensing circuit to produce a digital code. A compensation circuit, over a period of time, compares a present value of the digital code to a first value of the digital code during the period, and subtracts a given value from the present value of the digital code if the present value is greater than the first value but add the given value to the present value of the digital code if the present value is less than the first value. An accumulator accumulates output of the compensation circuit, and a filter filters output of the accumulator.

This application provides an isolation transformer. The isolation transformer is applicable to a power converter, the power converter further includes a first power conversion module and a second power conversion module, the isolation transformer includes a high-voltage winding, a low-voltage winding, and a solid insulation housing. The high-voltage winding has a solid insulation layer and the solid insulation housing has an opening surface, the opening surface faces the second power conversion module, the solid insulation housing covers the low-voltage winding and the high-voltage winding that has the solid insulation layer, a conducting layer or a semi-conducting layer is disposed on the solid insulation housing, and the conducting layer or the semi-conducting layer of the solid insulation housing is grounded. In this application, a volume of the isolation transformer can be reduced, power density of the power converter can be improved, and low costs and high applicability can be ensured.

This application provides an isolation transformer. The isolation transformer is applicable to a power converter, the power converter further includes a first power conversion module and a second power conversion module, the isolation transformer includes a high-voltage winding, a low-voltage winding, and a solid insulation housing. The high-voltage winding has a solid insulation layer and the solid insulation housing has an opening surface, the opening surface faces the second power conversion module, the solid insulation housing covers the low-voltage winding and the high-voltage winding that has the solid insulation layer, a conducting layer or a semi-conducting layer is disposed on the solid insulation housing, and the conducting layer or the semi-conducting layer of the solid insulation housing is grounded. In this application, a volume of the isolation transformer can be reduced, power density of the power converter can be improved, and low costs and high applicability can be ensured.

A method for isolating a fault in an underground power distribution network. The network includes a power line, a plurality of transformers electrically coupled to and positioned along the power line, a first recloser connected to one end of the power line and a second recloser connected to an opposite end of the power line, where each transformer includes an upstream switching device and a downstream switching device, and where power is provided to both ends of the power line through the first and second reclosers and one of the switching devices is a normally open switching device. The method includes detecting overcurrent by some of the switching devices, detecting loss of voltage by some of the switching devices and sending clear to close messages to some of the switching devices to open and close certain ones of the switching devices to isolate the fault.

A magnetic component and a switch power supply device are disclosed. The magnetic component includes a magnetic core and at least three windings, the magnetic core including at least three winding columns, at least one side columns, a first cover plate and a second cover plate opposite to each other, wherein the at least three winding columns are sequentially arranged in adjacent, the first cover plate and the second cover plate are respectively at upper parts or lower parts of the at least three winding columns and the at least one side column to form a closed magnetic flux loop; the at least three windings are wound on the at least three winding columns, respectively; wherein magnetic flux direction of the middle winding column in adjacent three winding columns is opposite to magnetic fluxes direction of the other two winding columns in adjacent three winding columns.

A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an AC power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant coil.