173results about How to "Improve rectification efficiency" patented technology

The invention relates to an automobile wrapping assembly detection tool and method combining multiple standard positioning systems. The automobile wrapping assembly detection tool comprises an inner plate standard positioning system, outer plate standard positioning systems, a hinge standard positioning system, a base plate, surface difference and contour detection block components, a lock catch detection block component, a hinge hole detection component and a turnover mechanism, wherein the inner plate standard positioning system, the outer plate standard positioning systems, the hinge standard positioning system, the surface difference and contour detection block components, the lock catch detection block component, the hinge hole detection component and the turnover mechanism are arranged on the base plate; the surface difference and contour detection block components are arranged at the circumferential circle, and eight outer plate standard positioning systems are uniformly distributed at the periphery and are in staggered arrangement with the surface difference and contour detection block components without interference.

The invention discloses a rectifier tube control circuit and a light load control method. When a rectifier tube is synchronously rectified, the gate drive voltage (VGS) of the rectifier tube is detected after the conducted preset time delay; if the VGS is less than a reference value, the rectifier tube is proved to have a light load; and if the VGS is more than a reference value, the rectifier tube is proved to have a heavy load. In one implementation mode, after the light load is continuously detected and lasts for a preset time, the synchronous rectifier is stopped; the synchronous rectifieris restarted every a plurality of periods and the light load or the heavy load is judged. In the other implementation mode, if the load is indicated for a plurality of continuous periods and lasts for a preset time, the synchronous rectifier is stopped; and when the rectifier tube is in non-synchronous rectifier, drain-source voltage (VDS) of the rectifier tube is detected in preset time delay after a crystal diode is conducted, if the VDS is less than the reference value, the synchronous rectifier is started at the next period. The invention improves the rectifier efficiency, effectively avoids the unstability in a critical state and also improves the noise resisting performance.

The invention discloses a dual-frequency receiving antenna and a dual-frequency rectifying antenna. The dual-frequency receiving antenna and the dual-frequency rectifying antenna are used for solving the problems that an existing dual-frequency receiving antenna is large in size and small in gain, an existing dual-frequency rectifying antenna is large in size, can not receive weak energy and is not suitable for remote transmission, and a rectifying circuit is poor in reliability. The dual-frequency receiving antenna comprises a rectangular radiating patch. A Z-type groove used for achieving dual-frequency characteristics is formed in the radiation patch. The lower end of the radiation patch is sequentially connected with a dielectric substrate layer and a metal earth plate through a coaxial line. The coaxial line is in circuit connection with the rear end of the radiation patch. An air dielectric layer is formed between the radiation patch and the dielectric substrate layer. The portions, arranged between the radiation patch and the dielectric substrate layer, outside the coaxial line are provided with metal sheets in a bilaterally-symmetric mode. The upper ends of the metal sheets are connected with the radiation patch. The lower ends of the metal sheets are connected with the dielectric substrate layer. One end face of the radiation patch is further connected with the metal sheets connected with the dielectric substrate layer. The dual-frequency receiving antenna and the dual-frequency rectifying antenna can be widely applied in the fields of communication, medical treatment, industry and the like, for microwave power transmission.

The invention relates to a dual polarization retrodirective rectifying antenna array. The dual polarization retrodirective rectifying antenna array comprises a three-layer structure, including an upper dielectric layer, a middle metal floor and a lower dielectric layer; radiation patches are arranged on the upper dielectric layer; coupled gaps are formed in the middle metal floor; microstrip feeder lines are arranged on the lower dielectric layer; the radiation patches, the coupled gaps and the microstrip feeder lines form the dual polarization retrodirective rectifying antenna array; meanwhile, a rectifying circuit is arranged on the lower dielectric layer; the microstrip feeder lines are connected with microstrip lines at the input end of the rectifying circuit with the same widths for radiating horizontally polarized wave and perpendicularly polarized wave when two output ports are in operating respectively; when a diode is conducted, rectifying of the rectifying circuit is completed to form the dual polarization retrodirective rectifying antenna array; the problem of efficiency decline caused by alignment sensitivity can be solved effectively, real-time tracking of incoming wave within a relatively large can be realized, and the retrodirective function of the antenna array is realized, so that the dual polarization retrodirective rectifying antenna array can be applied to the fields of wireless communication, vehicle-mounted radar, wireless energy transmission and the like.

The invention provides a positioning device and a buckling positioning method of a longitudinal beam, relates to the technical field of vehicle fittings, and solves the problems of incapability of guaranteeing the buckling precision and easy generation of verification error caused by using a visual inspection mode for performing the buckling verification for inner and outer plates in the prior art. The positioning device comprises a detector matched and connected with a part, wherein at least two positioning grooves are formed in the detector. The positioning device further comprises dowel pins; one ends of the dowel pins are fixed in the positioning grooves, and the other ends are free ends; and the dowel pins are used for positioning the position of the part corresponding to the detector. The positioning device is mainly applied to vehicles.

The invention discloses a high-efficiency rectifier constituting an RFID electronic tag and rectifier units. The high-efficiency rectifier is characterized in that the high-efficiency rectifier comprises n stages of rectifier units, the output end of the first stage of rectifier unit is connected with the input end of the second stage of rectifier unit, the output end of the second stage of rectifier unit is connected with the input end of the third stage of rectifier unit, and by analogy, the output end of the (n-1)th stage of rectifier unit is connected with the input end of the nth stage of rectifier unit; the radio frequency input ends of all the stages of rectifier units are connected; each stage of rectifier unit comprises a first bootstrap circuit, a second bootstrap circuit, a fourth rectification field-effect transistor, a fifth rectification filed-effect transistor, a DC blocking capacitor and an energy storage capacitor, the first bootstrap circuit and the second bootstrap circuit provide DC bias for a grid electrode of the fourth rectification filed-effect transistor and a grid electrode of the fifth rectification filed-effect transistor respectively, a substrate of the fourth rectification filed-effect transistor and a source electrode of the fifth rectification filed-effect transistor are connected with the output end of the rectifier unit and grounded through the energy storage capacitor. The sensitivity and the communication distance of the RFID electronic tag can be effectively improved, and the high-efficiency rectifier has good application prospects.

The invention discloses a novel high-power centralized microwave rectifier circuit, comprising a microstrip power distribution circuit and a microstrip rectifier circuit. The novel high-power centralized microwave rectifier circuit is characterized in that output of a microwave source (1) is connected with a microstrip power distribution circuit (2); the power distribution circuit has multiple paths of output, output of each power distribution circuit is respectively connected with a Schottky diode microstrip rectifier circuit (3); output of each Schottky diode microstrip rectifier circuit is connected with a direct current load (4); the microwave source (1) penetrates through the bottom of a circuit board to be connected with an input end (5) of the microstrip power distribution circuit and be fed into the power distribution circuit (2); the microstrip power distribution circuit (2) is connected with the microwave source (1) by virtue of one end of the input end (5) of the microstrip power distribution circuit, the other end of the microstrip power distribution circuit is respectively connected with the output end (7) of the microwave power distribution circuit (2) by virtue of a 1/4 wavelength impedance conversion microstrip line (6); and the output end (7) of the microstrip power distribution circuit (2) is connected with an input end (9) of the microstrip microwave rectifier circuit (3), microstrip line width is the same, natural transition is realized, and the high-power centralized microwave rectifier circuit is formed.

The invention discloses a high-efficiency dual-frequency rectifying circuit. The high-efficiency dual-frequency rectifying circuit comprises an upper layer microstrip structure, an intermediate dielectric substrate and a bottom layer metal floor, wherein the upper layer microstrip structure is printed on the upper surface of the intermediate dielectric substrate; the bottom layer metal floor is printed on the lower surface of the intermediate dielectric substrate; and the upper layer microstrip structure comprises a dual-frequency impedance matching network, a voltage doubling rectifying circuit structure, a harmonic suppression network and a load end which are connected in sequence. According to the high-efficiency dual-frequency rectifying circuit, due to the harmonic suppression network, the rectifying efficiency can be improved; due to the voltage doubling rectifying structure, the output voltage can be increased; and finally, by virtue of the regulation and control on the input impedance, the dual-frequency impedance matching network is designed, so that high rectifying efficiency of the disclosed rectifying circuit at two frequencies can be realized.

The invention discloses a high-power modular battery formation charging/discharging system, belonging to the field of battery formation charge/discharge. The system comprises an invertible DC (direct current) power module, a DC bus, a conversion charging/discharging module and a central control unit. The invertible DC power module adopts an automatic master-slave current sharing technology, can automatically configure the module number according to the system capacity, realizes automatic current sharing among the modules, and can inversion-feed the redundant electric energy back to the power grid so as to realize master-slave redundant invertible DC power module design; the DC bus transmits electric energy in the system; the conversion charging/discharging module is directly connected with the DC bus; by adopting the automatic master-slave current sharing technology, each module can form a loop independently for production, or multiple modules are freely connected in parallel to form a loop for production; and the central control unit is connected with the invertible DC power module and the conversion charging/discharging module through the bus, and can realize the functions of operation data acquisition, system resource allocation, module alternation coordination, system capacity reduction protection and the like.

The invention discloses a microwave energy receiving flat panel capable of absorbing a linearly polarized incident wave in a random direction. The microwave energy receiving flat panel is formed by continuation and arrangement of at least one sub-wavelength square array unit, wherein a square dual linearly polarized resonance structure is etched on a first thin metal layer; the first thin metal layer is formed by forming bar grooves at opposite corners and inside a patch; two metal via holes are formed in the patch; the two metal via holes pass through various middle layers and are connected with two power combining networks respectively; the two power combining networks are located in two layers of strip line structures respectively and are formed by cascading two-in-one power combining circuits; output ends of the two power combining networks are connected with two input ends of a directional coupler; two output ends of the directional coupler are connected with two rectifier circuits respectively; and the output ends of the rectifier circuits are connected in parallel such that a direct-current output is obtained. The microwave energy receiving flat panel achieves efficient receiving of linearly polarized incident electromagnetic wave energy in the random direction in the space, and can be widely applied to the fields of receiving and converting of microwave energy with various bands and power levels.

The invention provides a chain plate detection device, which relates to the technical field of escalator components, the chain plate detection device comprises a bracket, a spring, a detection tongueand a sliding rod; the bracket is provided with a first slideway, the sliding rod is sleeved in the first slideway, the detection tongue is fixed at one end of the sliding rod, the spring is sleeved on the sliding rod and positioned between the bracket and the detection tongue; the bracket is fixed above the sidewalk chain, the detection tongue can compress the spring and abut with the upper end surface of the inner link plate and the outer link plate. In normal installation, the lower end face of each inner link plate and the outer link plate is provided with a groove, and when the inner linkplate or the outer link plate is installed reversely, the detection tongue can be inserted into the groove. The chain plate detection device alleviates the technical problem that the prior art cannotaccurately detect whether the inner chain plate and/or the outer chain plate in the sidewalk chain are/is installed reversely.

The invention discloses an integrated and small-sized coaxial feeding circularly polarized rectifying antenna used for a 2.45GHz microwave power transmission system. The antenna comprises a sheet material, a coaxial circularly polarized microstrip antenna, a rectifying diode, a low-pass input oval filter, an output filter and a matching circuit; the sheet material adopts the common FR4, so that the research cost of the rectifying antenna is greatly lowered; the circularly polarized corner-cut coaxial microstrip antenna has the central frequency point of 2.45GHz; a coaxial feeding point mode for feeding, and layered design of a rectifying circuit, the matching circuit and a receiving antenna are adopted, and two layers are connected by using an SMA connector; the low-pass input oval filteradopts bending design, so that the length of the rectifying circuit is shortened; the area of the rectifying antenna is reduced, the microwave receiving power within unit area is improved; by adoptionof the matching circuit with low loss sand high matching effect, the efficiency of the rectifying circuit is improved; by designing a direct current expansion interface, the rectifying antenna unitscan be cascaded into a rectifying antenna array conveniently; and tests prove that the antenna efficiency can reach as high as 75% when the load is 200-<omega>.

The invention discloses an electric vehicle sliding automatic charging circuit, which belongs to the device for charging the storage battery during the usage of electric vehicles. The invention provides the electric vehicle automatic charging circuit with improved circuit for executing charging in the sliding process of the electric vehicles on the basis of the invention 'electric vehicle sliding automatic charging circuit' applied by the inventor. When a single field effect transistor V1 is used for single-terminal output, the secondary electrode L1 of a high-frequency transformer T3 only outputs a half-wave rectified voltage. an S16, a D17, a C13 and an L2 are added, and the energy stored during the cut-off period T3 of the field-effect transistor V1 can be released by the D17 and the C13, so that the L2 can also output a half-wave rectified voltage in the reverse period of the V1. Accordingly, the entire device can output a full-wave rectified voltage and the rectification efficiency is improved by one time. Additionally, connected resistors and temperature-control switches can facilitate a more reliable operation of the device. The invention can prolong the running mileage of the electric vehicle, protect the controller and, more importantly, significantly prolong the service life of the storage battery.

The invention relates to a synchronous rectifier circuit of a wireless charging receiving terminal, which is used to realize the rectification function of a wireless charging receiver. The synchronousrectifier circuit is connected between a resonant circuit of the wireless charging receiver and a load, and includes an MOS transistor rectifier circuit and a synchronous rectifier control circuit. The synchronous rectifier control circuit controls the working sequence of the MOS transistors in the MOS transistor rectifier circuit by controlling the driving voltages input to the MOS transistors in the MOS transistor rectifier circuit, so that the synchronous rectifier circuit has a rectification effect consistent with a preset effect. By adopting the synchronous rectifier circuit of the wireless charging receiving terminal of the invention, the rectification efficiency is higher than that of the diode rectifier circuit in the prior art, and the heating problem caused by diode rectification loss can be significantly improved. The synchronous rectifier circuit is simple and convenient, needs no additional software control, and can be used as an independent module to replace the diode rectifier module.

The invention relates to a grid-control bridge rectifier with a surge current limiter, comprising a first and a second alternating current input ends L and N, a first and a second direct current output ends B+ and B-, a first and a second fixed voltage source ends Vcc1 and Vcc2, a surge current limiter, two positive polarity detectors and two negative polarity detectors, two positive polarity drive circuits and two negative polarity drive circuits, two grid-control transistors of a body-containing diode and two grid-control transistors of a body-free diode. The two fixed voltage sources are respectively connected to Vcc1 and Vcc2 and referred to B+ and B-; the surge current limiter is provided with a first and a second input ends and an output end which are respectively connected to L, N and B+; the four polarity detectors are provided with the first and second input ends which are respectively connected to L and N; the four polarity drive circuits are provided with the first and second input ends and one output end which are respectively connected to Vcc1/Vcc2, B+/B- and the input end of the four grid control transistors which have one input end, and the first and second output ends which are respectively connected to the output ends of the four polarity drive circuits, L/N and B+/B-.

An integrated series Schottky diode rectifier having the characteristics of high reverse voltage resistance, ease of fabrication, small size, high yield rate, automated fabrication applicability and low manufacturing cost is disclosed to include multiple lead frames, multiple Schottky diode chips mounted on the lead frames and connected in series, first conductor connected to the positive electrode of first Schottky diode chip, second conductor connected to the positive electrode of each of other Schottky diode chip and bridged onto the lead frame that carries the previous Schottky diode chip, electrode pin set including positive pin connected to first conductor at first Schottky diode chip, negative pin connected to negative electrode of last Schottky diode chip and external pin connected in series between second conductors of each two adjacent Schottky diode chips, and resin package body molded on lead frames and wrapped about Schottky diode chips and electrode pin set.

The invention discloses a polarization deflection non-sensitive wireless power and information transmission system. The system comprises a base station module and a rectification antenna. The base station module is composed of a transmitting circuit and a receiving circuit. A transmitting circuit in the base station module is composed of an oscillator, a coupler, a power amplifier, a control circuit, a filter I and a dual-polarized antenna. A receiving circuit in the base station module is composed of a dual-polarized antenna, a filter II, a low-noise amplifier, a mixer, an ADC data sampler and a baseband signal processing circuit. The rectification antenna is composed of a dual-polarized antenna, a quadrature coupler, a quarter-wavelength short-circuit branch, a rectifier I and a rectifier II. The vertical polarization port and the horizontal polarization port of the dual-polarized antenna are respectively connected with the input port and the isolation port of the quadrature coupler;rectifiers I and II are respectively connected with a straight-through port and a coupling port of the quadrature coupler; and the quarter-wave short-circuit branch is connected with input ports of the rectifiers I and II to suppress second harmonics so as to enhance the rectification efficiency.

The invention discloses a high-efficiency rectification circuit. The high-efficiency rectification circuit comprises an upper layer microstrip structure, an intermediate medium substrate, and a bottom layer metal floor, the upper layer microstrip structure is printed on the upper surface of the intermediate medium substrate, and the bottom layer metal floor is printed on the lower surface of the intermediate medium substrate. The high-efficiency rectification circuit is characterized in that the upper layer microstrip structure is formed by a two-segment branch line coupler, a first sub-rectification circuit, and a second sub-rectification circuit, one isolation terminal of the two-segment branch line coupler is connected to the ground, and the two-segment branch line coupler is connected with the first sub-rectification circuit and the second sub-rectification circuit. According to the high-efficiency rectification circuit, the two-segment branch line coupler whose isolation terminal is connected to the ground is employed to re-inject a part of reflection waves generated by the two sub-rectification circuits due to impedance mismatch to the sub-rectification circuits for utilization, the rectification efficiency of the whole circuit is improved, better match between the whole rectification circuit and an antenna is realized, and the energy loss of the system is reduced.

The invention relates to an aluminum bus arrangement method and a system thereof, and especially relates to an aluminum electrolysis tank external-compensation power supply rectification set aluminum bus arrangement method for the arrangement of the external compensation current direct-current bus of the working current and working voltage parameter selection, the flue end and the aluminum outlet end of an electrolytic aluminum auxiliary power supply rectification system, and a system thereof. An aluminum outlet end rectification system is eliminated, one end of an aluminum outlet end compensation bus is connected with a flue end compensation rectification system, the other end of the aluminum outlet end compensation bus is connected with a flue end compensation bus, and the other end of the flue end compensation bus is connected with the flue end compensation rectification system. The adoption of a current superposing principle in the invention reduces the current of the power supply rectification system and properly improves the direct-current running voltage of the power supply rectification system in order to improve the running efficiency of the rectification system when the electrolytic technology external compensation current is satisfied.