1092 results about "Distribution circuits" patented technology

A circularly-polarized-wave patch antenna includes a main body having a patch electrode provided with two feeding points and a circuit for generating a phase difference of 90° between signals supplied to the feeding points. A Wilkinson distribution circuit is provided between the 90°-phase-difference generating circuit and a coaxial cable (feeder line) so as to improve a reflection characteristic. The patch antenna includes two feeding points, and thus a favorable axial ratio characteristic can be obtained in a wide band. Also, a favorable reflection characteristic can be obtained in a wide band because of the Wilkinson distribution circuit. Accordingly, the patch antenna can be used in a wider frequency band.

A method, apparatus, and system for providing a power monitoring service to an electric power consumer at a power consumer site involves providing a monitoring unit at the power consumer site with connections to probes on individual power distribution circuits emanating from a power distribution and control panel of the consumer site. The monitoring unit measures a power consumption of each of the power distribution circuits using the probes, and communicates power consumption data related to the respective power distribution circuits to a power monitoring server that collects and analyzes the power consumption data. The power monitoring server has a circuit description table that identifies each of the power distribution circuits to permit detailed billing to the power consumer. The monitoring server also uses per-circuit information relating to many power consumers to compute at least one aggregate power consumption profile.

An apparatus is described that associates categorization information with network traffic to facilitate application level processing through processing of network traffic in accordance with provisioned rules and policies. The apparatus includes a plurality of microcode controlled state machines, wherein at least one microcode state machine processes at least one input data field using a hash function to generate a hash identifier. This embodiment further includes a distribution circuit that routes input data to the plurality of microcode controlled state machines, such that at least one individual microcode controlled state machine applies a rule to the input data to produce the at least one input data field, and to produce modification instructions based on the hash identifier. This embodiment further includes a first circuit that appends the hash identifier to the input data to produce modified input data based on the modification instructions, and that routes the modified input data in accordance with an output routing strategy. Advantageously, the apparatus provides an architectural framework well suited to a low cost, high speed, robust implementation of flexible, advanced network security and monitoring features and network traffic analysis.

The invention provides an optically powered device interface module for operating an external device, and an optically powered data link comprising the same. In one embodiment the device interface module includes an optical interface for receiving optical power and data signals, an electrical USB interface for providing USB compliant electrical data signals and a 5V electrical power signal to an external USB device, a transducer coupled to a signal processor for converting the optical power and data signals into the 5V electrical power signal and the USB-compliant electrical data signals, and a power distribution circuit for providing electrical power obtained from the optical power signal to the device interface module circuitry. The transducer may be embodied using a single photovoltaic power converter for receiving the optical power and for receiving and transmitting optical data signals.

An integrated circuit (IC), IC assembly and circuit for distributing a clock signal in an integrated circuit includes a capacitive clock distribution circuit having at least one conductor therein. At least one inductor is formed in a metal layer of the integrated circuit and is coupled to the clock distribution circuit. The inductor, generally in the form of a number of spiral inductors distributed throughout the integrated circuit, provides an inductance value selected to resonate with the capacitive clock distribution circuit at resonance, power dissipation is reduced while skew and jitter performance can be improved.

The present invention relates generally to detecting energy theft within an energy distribution system and more particularly to systems and methods for detecting energy discrepancies in voltages and/or currents reported by electric meters present in a distribution circuit, without requiring installation of additional hardware at the transformer. Typically, the location of each of at least two meters is determined with respect to a transformer. The line resistances within the distribution circuit are determined starting with a line resistance farthest from the transformer. Estimated line voltages are determined for at least one electric meter using the estimated line resistances, and the estimated voltages are compared to actual voltage readings for the at least one electric meter. The existence of line loss is determined based on this comparison.

The invention relates to a method and device for performing on-load scheduling on a single-phase load in the intelligent power grid field. A master controller is mounted at an input end of a three-phase wire, a secondary controller is mounted at each single-phase branch of the wire, and the master controller exchanges information with the secondary controllers through communication interfaces. When the wire power unbalanced degree is over limit, the master controller optimizes and formulates a control scheme to operate the secondary controllers to convert the single-phase load between the phases; in the conversion process, the load is free from instant power off, and the power grid is free from impact and interference; and therefore, the distribution circuit dynamically runs in a load balance state, the unbalanced consumption problem of the circuit is completely solved.

A circuit for distributing a clock signal in an integrated circuit includes a capacitive clock distribution circuit having at least conductor therein. At least one inductor is formed in a metal layer of the integrated circuit and is coupled to the clock distribution circuit. The inductor, generally in the form of a number of spiral inductors distributed throughout the integrated circuit, provides an inductance value selected to resonate with the capacitive clock distribution circuit. By operating the clock distribution circuit at resonance, power dissipation is reduced while skew and jitter performance can be improved.

An apparatus is described that facilitates network security and network traffic monitoring through processing of network traffic in accordance with provisioned rules and policies. The apparatus includes a set of microcode controlled state machines, each of which includes a computation kernel operating in accordance with microcode stored in a control store. A distribution circuit routes individual network traffic segments derived from input network traffic to the set of microcode controlled state machines, so that at least one of the microcode controlled state machines applies a rule encoded in the microcode to the individual network traffic segments to produce modification instructions. A circuit performs a modification of the input network traffic based on the modification instructions from the at least one microcode controlled state machine to produce output network traffic. Advantageously, the apparatus provides an architectural framework well suited to a low cost, high speed, robust implementation of flexible, advanced network security and monitoring features, traffic management, and integration of devices within a system.

The invention relates to a distribution circuit single-phase earth fault automatic locating method, which comprises: (1) by allocating a route selection core which includes the monitoring of earth fault, the instilling of diagnosis signals, the detection of diagnosis signals and a communicating module in a distribution substation, the system is judged whether a single-phase earth fault happens; the diagnosis signals are instilled to the system automatically in the fault condition; the biggest feeder line of the diagnosis signals is detected to be an earth circuit line; the route selecting result is transmitted to an error locating computer by a communicating network. (2) A signal detector is arranged along the distribution circuit line to detect whether a diagnosis signal exists in a first order system and the detecting result is sent to the error locating computer by the communicating networks. (3) The error locating computer is installed in a dispatching center to communicate with the signal detectors on feeder lines and each route selection core in the jurisdiction, and determine automatically the sections of a single-phase earth fault by using error locating software. The distribution circuit single-phase earth fault automatic locating method has the advantages of high degree of automation, short location time and high location accuracy, etc.

A clock signal distribution circuit has a clock tree configuration. In the layout of the clock tree, a standard clock tree is prepared having a route buffer, a plurality of intermediate stage buffer cells and a plurality of last stage buffer cells connected in a hierarchical configuration. All of the clock lines have an equal length. If there are no set of flip-flops ina target integrated circuit corresponding to a set of last stage buffer cells, the set of last stage buffer cells are removed as a whole provided there is not other last stage buffer cells connected to a flip-flop.

The invention relates to a direct-current micro-grid system and a control method thereof. The direct-current micro-grid system comprises a direct-current power distribution circuit, a bi-directional AC/DC (alternating current/direct current) rectifying/inverting device, a distributed energy generating device, an energy storing device, direct-current loads, alternating-current loads, a urban microclimate interactive system, a clock interactive system, a micro-grid control system and micro-grid protecting devices, an upper scheduling management system is arranged in the micro-grid control system so as to form layered management for micro-grid energy. The direct-current micro-grid control method includes: entering a grid connection mode or an island model according to working state of a large power grid, and determining the working states of the energy storing device and the distributed energy generating device according to information of the urban microclimate interactive system and the clock interactive system. The direct-current micro-grid system can independently supply power to the alternating-current and the direct-current loads and can be connected with a power grid to generate power according to processed result of urban microclimate interactive information, so that requirements on power supply for users are met, cost is reduced, designing, controlling, operation and maintenance of a micro-grid are benefited, and reliability, economy and efficiency of the micro-grid are effectively improved.

The invention discloses a portable universal digital storage oscilloscope. The passive probe connects with the signal transforming conditioning circuit, analog-digital conversion ADC circuit, data path and high frequency control module, DSP processor system, data interface, and the signal transforming conditioning circuit connects with the trigger function generating circuit, data path and high frequency control module, and ADC circuit, and digital signal LCD display connects with the DSP processor system, and the signal transforming conditioning circuit, and the rechargeable battery and AC-DC power module connect with the intelligent power switch and distribution circuit, and DSP processor system. The invention uses four ADC chips to phase interleaving sampling, which increasing bandwidth, and lower cost; the external power and internal battery can automatically switch to supply power, to intelligently control the power distribution, with low power, small size, and can be used in various testing field handheld; the single machine completes the signal processing result and displaying, audio recording and storing the output, which can set up and update procedures through data interface, and it is a portable universal digital storage oscilloscope.

A lighting system includes a controller that is configured to provide thermal management for the lighting system by distributing excess energy in the lighting system through multiple power dissipation circuits. In at least one embodiment, the lighting system is a phase cut compatible, dimmable lighting system having one or more light sources selected from a group consisting of at least one light emitting diode and at least one compact fluorescent lamp. In at least one embodiment, the controller is configured to control the plurality of power dissipation circuits in accordance with a thermal management strategy to dissipate the excess energy in the phase cut compatible, dimmable lighting system. The particular thermal management strategy is a matter of design choice. The power distribution circuits include two of more of: a controlled switch path power dissipation circuit, a controlled link path power dissipation circuit, and a controlled flyback path power dissipation circuit.

The invention relates to an integrated control system for power distribution measurement. The integrated control system of the invention comprises a main control module which consists of a central processing unit and a memory unit used for storing the data of various parameters, and a measurement module, a meter reading module, a control module and an LCD display module which are all connected with the main control module, wherein, the measurement module is used for taking the samples of voltage signals and current signals of a power distribution circuit and an electricity use circuit and sending the signals to the central processing unit after the signals are processed by a digital signal processor; the meter reading module is used for reading the electricity data of an electrical energy meter; the control module is used for controlling the switch-in and switch-out of the power distribution circuit and the electricity use circuit and also detecting the implementation situation. The integrated control system for power distribution measurement of the invention integrates the functions of a high-precision three-phase electrical energy meter, a meter reading concentrator, a distribution and transforming measurement monitoring terminal, a power quality monitoring terminal and a load management terminal in an electric power system into a whole, and also spares complex circuits and repetitive communication modules for the communication among each equipment and between each equipment and a main control station, thus saving cost and ensuring convenient maintenance.

An air-conditioning system for a building comprises a hot water distribution circuit (10), a cold water distribution circuit (12) and several terminal air conditioning units (14). Each of these terminal air conditioning units (14) comprises a fan (40) for blowing air in a space of the building, a heating coil (42) connected to the hot water distribu-tion circuit (10) and/or a cooling coil (44) connected to the cold water distribution circuit (12). At least one ambient temperature control system allows to control heating power of the heating coils and cooling power of the cooling coils. The system further includes a calorific energy management system (80) with a heat pump for transferring calorific energy: a) from the cold water distribution system to the hot water distribution system; b) from the cold water distribution system to atmosphere; and c) from the atmosphere to the hot water distribution system. The calorific energy management system (80) is capable of managing the calorific energy transfers with a three level control system so as to optimise energy consumption.

The invention provides an online low-current earth fault positioning method and positioning device based on a BP neural network and by means of a multi-source data fusion algorithm. Due to the fact that terminals arranged on different positions on a circuit accurately catch zero-sequence current transient signals of zero-sequence currents which exceed a starting value before a previous period of a starting value and after four periods of the starting value, signal characteristics of a fault transient signals are extracted by means of a Prony algorithm, a wavelet packet algorithm, an HHT algorithm and a fractal algorithm, the characteristics extracted by the algorithms are analyzed by means of the BP neural network, and a zone where a fault occurs is determined. The positioning device comprises a terminal and a main station, wherein the terminal is arranged on an overhead line tower or in a cable ring main unit, the input end of the terminal receives a zero-sequence current signal synthetized by a phase current signal of a CT secondary side of a power distribution circuit including an overhead line and a cable, the terminal is connected with the main station through optical cable communication or mobile communication, and the main station is arranged in a transformer substation or a dispatch center, comprises an optical cable communication module and a mobile communication module and receives a signal sent by the terminal. The method and the device are mature in technology and high in reliability.

The invention discloses a combined down-the-hole hammer and a construction method thereof. The combined down-the-hole hammer comprises a coupler, a bracket body (3) and a plurality of small-diameter impacters (4) which are arranged on the bracket body (3), wherein one end of a gas distribution device (2) is connected with the bracket body (3), and the other end of the air distribution device (2) is connected with the coupler; the gas distribution device (2) is provided with a gas collection chamber (21); the gas collection chamber (21) is provided with gas distribution circuits communicated with the impacters (4); the gas distribution circuit which is connected with the impacter (4) arranged at the periphery has a large curvature gas circuit structure (22); the gas distribution circuit which is connected with the impacter (4) arranged in the center has a straight through structure (23); and the gas distribution device (2) is provided with a regulating device (26) capable of regulatinggas pressure and gas flow. The combined down-the-hole hammer constructed by the method has the advantages of low cost, reasonable structure, easy maintenance, convenient assembly and disassembly, reliable seal, effective energy utilization and high punching efficiency.