208results about How to "Realize two-way transmission" patented technology

The invention relates to a controller of full-power alternative-direct converter used in wind generation, wherein the alternative-direct converter is formed by network converter and the convert of generator; the used generator is a permanent-magnetic generator; the rotor is in permanent-magnetic structure, without external magnetic activate power supply; two convert loops both uses the PWM converters operating in four quadrants, based on full-control element, which can improve the dynamic response, reduce cost and impact, realize bidirectional transmission of electricity, and realize generating via power factor sine wave current parallel network; and the invention uses improved direct torque technique to control the converter, to confirm the sine wave change of input current at the stator, with quick response, low vibration, torque dynamic control and wide speed adjust range.

The invention discloses an energy feedback type traction power supply device with a reactive compensation function and a control method thereof. The device comprises a dual-split transformer, two high-power bidirectional converters, a direct-current filter inductor and a central control unit, wherein each vice-side winding of the dual-split transformer is connected with one high-power bidirectional converter; direct-current output sides of the two high-power bidirectional converters are connected in series, and the direct-current filter inductor is connected in series between a direct-current positive output and a direct-current contact network of the first high-power bidirectional converter; and the central control unit is connected mutually with the two high-power bidirectional converters through a controller area network (CAN). In the control method, the hierarchical control is adopted, the central control unit is used for calculating an active current instruction and a reactive current instruction, and the two high-power bidirectional converters perform closed loop control on alternating current of the two high-power bidirectional converters according to the active current instruction and the reactive current instruction. The device not only can meet the requirements of traction power supply and braking energy feedback of subway trains, but also has a reactive compensation function used for improving power factors at incoming wires of master substations.

The present invention discloses an electric converter circuit topological structure and a control method thereof. The circuit topology comprises a full-bridge inverter, a primary side resonance dynamic compensation network, a primary side coil, a secondary coil, a secondary resonance dynamic compensation network, a full-bridge synchronous rectifier and a load. The primary side resonance dynamic compensation network employs a structure of connection in series of a compensation inductor and an adjustable resonance capacitor, the secondary resonance dynamic compensation network employs a structure of connection in series of a coil and the adjustable resonance capacitor, in the conditions that system parameters are changed caused by factors such as different coil coupling coefficients, different loads, the temperatures and device production manufacturing errors, the PWM duty ratio of a capacitive switching switch is regulated to generate continuously changed and adjustable equivalent resonant capacitance to perform dynamic compensation for the resonance network to achieve the soft switch of the full-bridge inverter and minimize the reactive power in the energy transmission of the system so as to maximum the electric energy transmission efficiency of the system and effectively enhance the regulation ability of the system output features in a condition of the constant working frequency of the system.

The invention discloses a bus-based battery pack equalizer circuit. The bus-based battery pack equalizer circuit comprises N batteries; each battery is connected with a corresponding equalizer circuit and the equalizer circuit is connected to a controller; each battery is connected with one equalizer circuit and each equalizer circuit is connected to one controller; the batteries correspond to the equalizer circuits one to one and the equalizer circuits correspond to the controllers one to one; the controllers are used for controlling the equalizer circuits according to the energy information of the battery pack, and thus realizing two-way flow of energy between the battery module and an energy transmission bus and realizing equalized energy storage of the batteries; the N controllers are connected in parallel to a data bus and the N batteries are connected in parallel to an energy transfer bus; N is greater than or equal to 2.

The invention consists of: TV station signal output device; HFC transmission network; hub and descramble controller; user terminal device. The remote control for single channel output at the mode of signal processing combining channel processing can make scramble/descramble of digital cable TV more efficiency, safety.

The invention relates to a three-phase-to-five-phase double-stage matrix converter based on a Z source, which belongs to the technical field of power electronic converters and aims to overcome the problems that the traditional five-phase voltage source inverter is large in size, low in input side power factor and limited in service life of a frequency converter and causes serious pollutions to power grid harmonic waves and the existing matrix type converter is low in voltage transmission ratio. The matrix converter provided by the invention comprises a double-stage matrix type converter and a Z source network, wherein the double-stage matrix type converter is composed of a rectifier stage circuit and an inverter stage circuit; the Z source network is connected in series between the rectifier stage circuit and the inverter stage circuit; one end of a first capacitor of the Z source network is connected with one end of a first inductor to serve as a first input end; the other end of the first inductor is connected with one end of a second capacitor to serve as a first output end; the other end of the second capacitor is connected with one end of a second inductor to serve as a second input end; and the other end of the second inductor is connected with the other end of the first capacitor to serve as a second output end. The matrix converter provided by the invention is suitable for driving a five-phase motor.

The invention relates to a fast scanning detecting device of a two-wire system industrial instrument and a detecting method. The detecting method comprises the following steps of: using an HART bus protocol digital communication technology and a multi-channel switching and high-precision data acquisition technology, matching with a special upper computer detecting software and realizing batch scanning detection of the two-wire system instrument, thus simplifying production process, reducing labor intensity and being convenient to removing trouble and maintaining; the system comprises an intelligent instrument digital communication interface part, can carry out digital communication by the bus and the measured instrument, realize two-way transmission of data and carry out testing and primary diagnosis on the intelligent functions of the intelligent instrument; the device has flexible connecting modes, and can automatically configure according to the quantity of the detecting instrument; and the fast scanning detecting device of the two-wire system industrial instrument and the detecting method provide decisions for improving technique and quality, optimize production process of the product and improve the production efficiency.

The invention provides a bi-directional signal adjusting chip of a USB Type-C cable and the USB Type-C cable. The chip comprises a memory, a processor and an adapter driver, and the adapter driver isused for conducting regenerative transmission on a high-speed signal; the memory is used for storing procedure codes, the processor is used for calling the procedure codes, when the procedure codes are executed, and the processor is used for executing the following operations that the data transmission direction of the USB Type-C cable and types supported by the transmission data are judged; the on-off states of all bumpers in the adapter driver are configured according to the data transmission direction and the supported types; the data output direction of the adapter driver is kept to be consistent with the data transmission direction, wherein two buffers having the two opposite directions are configured on each data transmission line in the bi-directional signal adjusting chip. The USBType-C cable can achieve bi-directional transmission.

The invention relates to a low-ripple-wave lithium battery charging and discharging achieving method. By means of the method, lithium batteries are charged and discharged by a two-way switch power source, a power circuit of the switch power source is a two-way half-bridge/ synchronous current doubler rectifier two-way direct-current/direct-current inverter, and a control circuit adopts inductance charging charge control and adopts a double PI adjuster and a diode automatic selection circuit so as to achieve constant-current charging, constant-voltage charging and constant-current discharging on the lithium batteries and achieve automatic smooth switching from constant-current charging to constant-voltage charging states. By means of the low-ripple-wave lithium battery charging and discharging achieving method, charging and discharging on ultra low ripple waves of the lithium batteries can be achieved by using filtering total inductance current iL as the control object.

The invention relates to Internet of things-based intelligent high-voltage switch cabinet. The Internet of things-based intelligent high-voltage switch cabinet comprises a high-voltage switch cabinet, and is characterized by comprising a sensor module, a radio frequency identification (RFID) module, a control mechanism, an on-site monitoring unit and an intelligent processing unit. In the Internet of things-based intelligent high-voltage switch cabinet, the conventional high-voltage switch cabinet is designed, so that the high-voltage switch cabinet is combined with intelligent unit; therefore, the intelligence of the high-voltage switch cabinet is realized in the true sense. The Internet of things-based intelligent high-voltage switch cabinet not only has the functions of the conventional high-voltage switch cabinet, but also has the functions of self-monitoring, self-diagnosis, self-action and the like.

The invention discloses a V2G (vehicle-to-grid) wireless bidirectional power transmission device based on a low-frequency PWM rectifier. The V2G wireless bidirectional power transmission device comprises a filtering and voltage-stabilizing capacitor, a first power switch, a second power switch, a third power switch, a fourth power switch, a first compensation capacitor, a first current sampling circuit, a first coupling coil, a second coupling coil, a second compensation capacitor, a fifth power switch, a sixth power switch, a seventh power switch, an eighth power switch, a second current sampling circuit, a load resistor, an inductive voltage detection coil, a signal acquisition and conditioning circuit, a digital-analog converter, a microprocessor and an electric power converter drive circuit. The V2G wireless bidirectional power transmission device has the advantages that wireless bidirectional power transmission is achieved, accurate measurement of inductive voltage of the coupling coils is guaranteed to meet system resonance requirements, and direct-current voltage with amplitude values changing as required are arranged at ports of a power supply side and a load side, so that power switch loss and device operating frequency are both reduced, and transmission efficiency and power are improved.

The invention discloses an on-screen interacting system and a control method thereof. The system comprises a handheld terminal and a fixed terminal in communication connection with the handheld terminal. The fixed terminal comprises a first control chip, a first display screen and a touch screen, wherein the first control chip is used for processing information, the first display screen is connected with the first control chip, and the touch screen is connected with the first control chip and used for transmitting touch signals to the first control chip. A second control chip, a second display screen and an input device are arranged on the handheld terminal, the second control chip is in communication connection with the first control chip, the second display screen is connected with the second control chip, and the input device is connected with the second control chip. Two-way transmission and two-way control of the handheld terminal and the fixed terminal can be realized, and use requirements of users are met.

The invention discloses an intelligent information management device, method and system. The intelligent information management device comprises a wired interface module, which comprises a plurality of wired communication interfaces and wireless communication interfaces. The main control module is used for receiving the control instruction of the host computer and converting the control instruction into a corresponding control signal. Or converting the parameter acquisition signal, the data acquisition signal output by the front-end equipment and the data acquisition signal output by the external communication equipment into a corresponding data signal, and outputting the data signal to the storage module; The data processing module is used for outputting the data signal stored in the storage component module to the storage component module after data processing when the control signal is received, so as to be obtained by the main control module and outputted through the correspondingwired interface and/or wireless interface. The invention solves the problem that only a single communication interface can be adopted between the intelligent signal management device and the front-endequipment, the upper computer and the terminal equipment, and the system adaptability is poor.

The invention discloses an automatic metering device for distribution transformers, in particular to an automatic metering device arranged inside a distribution transformer, belonging to local or remote power distribution management system field. The invention comprises a voltage transformer, a current transformer, a high voltage capacitive divider, a suspension type power supply unit, a metering unit, a monitoring unit for distribution transform parameters, and a wireless transmission unit. The invention has the advantages that a primary side of the distribution transformer can be metered; as the invention can simultaneously meter the secondary side of the distribution transformer, thus the distribution transformer loss of system can be calculated, the monitoring management level of distribution then can be improved obviously, and the invention can also apply in remote distribution management systems conveniently.

The invention discloses a method for realizing power information composite transmission in a laser wireless energy transmission system, and belongs to the technical field of electric communication. According to the method, to-be-transmitted data is coded and modulated to obtain a binary signal frame enabling the power of a bidirectional converter to be balanced; the laser receiving end is controlled by comparing the average value of each pulse period of the photovoltaic array output current of the laser receiving end with the total average value of one signal frame; and the modulation reflex reflector arranged at the laser receiving end modulates part of the main light beam entering the receiving end into pulsed light under the control of the controllable level signal, so that modulation and emission of a signal at the receiving end are realized, and power one-way transmission and signal two-way transmission of the whole system are further realized.

The invention discloses an intelligent protection type permanent magnetic contactor capable of performing remote communication. The contactor comprises a rectification filtering circuit, a control module, a coil, and an energy storage capacitor which are sequentially connected with an alternating current power supply; a power module is connected with a microprocessor, an acquisition chip processing module, a liquid crystal display operation module, a switching value input circuit and a communication module respectively; the microprocessor is connected with the acquisition chip processing module, the liquid crystal display operation module, the switching value input circuit and the control module respectively; at the same time, the microprocessor is connected with a communication interface output circuit through a communication protocol chip, a first photoelectronic isolation bus driver and a second photoelectronic isolation bus driver respectively; the communication interface output circuit is connected with a field bus circuit; and the acquisition chip processing module is connected with a main circuit three-phase voltage acquisition processing circuit, a main circuit three-phase current acquisition processing circuit and a zero sequence current acquisition processing circuit. The permanent magnetic contactor realizes the intellectualization function of integrating the measurement, setting, protection, communication and control.

The invention relates to a method of accessing a positioner into a base station and a communication method of the positioner with the base stations. The method specifically comprises the following steps: 1, each base station broadcasts a synchronization head outward in each channel; 2, the positioner takes the base station as the current base station, wherein the beacon with the strongest signal around belongs to the base station, and then a channel is selected randomly; 3, the positioner receives the synchronization head broadcasted by the base station to judge whether an idle time slot is available or not; if the idle time slot is not available, the step 5 is implemented; 4, the positioner is accessed to the base station, and the step 6 is implemented; 5, the positioner re-selects a different channel, the step 3 is implemented; 6, if the positioner cannot send data to the base station, the step 3 is implemented; if so, the data is sent; and 7, if the positioner does not have data tobe sent, the process is ended; if so, and the previous Q beacons with the strongest signals around the positioner belong to a new base station, the positioner is switched to the base station, the step3 is implemented, otherwise, the step 6 is implemented. The data size of communication of the base stations is increased, the utilization ratio of the base stations is improved and the data transmission speed among the positioners is increased.

Provided is a cross-safety-subarea automatic electric-power control and monitoring system and method. The cross-safety-subarea automatic electric-power control and monitoring system comprises a safety area I monitoring server, a safety area I switch, a one-way forward isolation device special for electric power, a one-way reverse isolation device special for electric power, a safety area III monitoring server and a safety area III switch. A safety area III monitoring server is provided with a device configuration and control program, generates a query or control command file CMD. TXT to be stored in a folder CMD3 through the configuration and control program, the one-way reverse isolation device special for electric power timely scans the folder CMD3, converts a new file into an encrypted binary data flow and then transmits the encrypted binary data flow to the safety area I monitoring server when finding the appeared new file. The safety area I monitoring server reads the binary data flow transmitted from the one-way reverse isolation device special for electric power, performs decryption to form the file CMD. TX and stores the file CMD. TX in a folder CMD1.

The invention discloses a full high-definition video meeting system, which comprises a main meeting place and a plurality of branch meeting places. The main meeting place comprises a data acquisition module, a data processing module and a high-definition video meeting terminal; each branch meeting place is provided with a high-definition video meeting terminal; the data acquisition module comprises an audio acquisition unit and a video acquisition unit; the video acquisition unit is a high-definition network camera, and is used for acquiring high-definition images in real time and compressing the high-definition images into a video data stream suitable for network transmission; a multi-point control unit is adopted by the data processing module; audio/video data are transmitted by adopting an MSTP (multi-service transfer platform) line; each terminal comprises a terminal receiving module, a terminal sending module, a terminal processor and a terminal playing module; each terminal playing module is connected with a terminal high-definition displayer; terminal processors of the branch meeting places are used for processing signals transmitted from the main meeting place. The 1080P technical standard is adopted by the meeting system disclosed by the invention during the whole process, and therefore, a 1080P full high-definition connection is kept in the whole link from signal source input to signal display.

The invention relates to a communication method based on frequency division and time division in a positioning system. The communication method comprises the steps as follows: 1, at least two channelsare set in a positioning base station; 2, a positioner randomly selects one channel; 3, the positioner receives a synchronous head broadcasted by a positioning base station, and judges whether a timeslot in an idle state exists according to an indicator in the synchronous head; and the step 5 is executed, if a judgment result is no; 4, the positioner randomly selects one idle time slot to send an access request to the positioning base station, after receiving the access request, the positioning base station judges whether the request accords with the actual situation; and the step 3 is executed, if the request is not accordant with the actual situation; a network access warrant is sent to the positioner in the corresponding time slot, after receiving the network access warrant, the positioner completes access work, and occupies the corresponding time slot to send positioning data to the positioning base station, and the process ends; and 5, the positioner reselects one channel whichis different from the current channel, and the step 3 is executed. According to the method provided by the invention, the data size of communication of the positioning base station is increased, and the utilization rate of the positioning base station and the data transmission rate of the positioner are improved.

The invention discloses a remote monitoring system based on GPRS transmission and an operating method, the system including an underlying control module, a transmission module, a local on-site monitor, a remote wireless monitor and an Android mobile phone client. The underlying control module consists of several parameter real-time monitoring modules, and a water quality control module, a water quality parameter monitoring module, a signal conditioning circuit and an MSP430 single-chip microcomputer are disposed in each parameter real-time monitoring module; the transmission module is a GPRS transmission module; the local on-site monitor is an LCD controlled by the MSP430 single-chip microcomputer; the remote wireless monitor is an upper computer equipped with monitoring software programmed by use of a VB language; and the Android mobile phone client is a mobile phone with monitoring software. The system can achieve wireless reception of water quality parameters and wireless transmission of control commands on the mobile phone and the upper computer via Internet and GPRS wireless networks, and negative factors of wired networks, such as high laying cost of lines, complex wiring and the like are avoided.

The invention discloses a DCDC converter, an on-board charger and an electric vehicle. The DCDC converter comprises a first three-phase bridge module, a resonance module, a second three-phase bridge module and a controller, wherein the first three-phase bridge module is configured to adjust the frequency of an input signal during charging; the resonance module is configured to resonate an output signal of a first adjustment module during charging and resonate an output signal of a second adjustment module during discharging; the second three-phase bridge module is configured to adjust the frequency of an output signal of a battery module during discharging; and in a light load mode, the controller is used for controlling the first three-phase bridge module to switch to two-phase bridge arminput or one-phase bridge arm input and controlling the second three-phase bridge module to switch to two-phase bridge arm output during charging, and is used for controlling the second three-phase bridge module to switch to two-phase bridge arm input or one-phase bridge arm input and controlling the first three-phase bridge module to switch to three-phase bridge arm output during discharging. Thereby, the switching loss in the light load mode can be reduced.