6028 results about "Rectifier" patented technology

The invention discloses a high-voltage circuit for an electric flame stove. The high-voltage circuit comprises a PFC circuit, a high-frequency conversion circuit, a boosting transformer, an energy coupling circuit and a voltage doubling circuit which are electrically connected in sequence. According to the EMI filter circuit, common-mode interference and differential-mode interference are filtered out, and pure alternating current input is provided for a back-end PFC circuit; two chips are adopted in the PFC circuit, so that the PFC circuit 300 finally realizes the consistency of the current waveform and the voltage phase; in the other embodiment of the invention, double chips are adopted, so that'fault linkage protection 'is realized; stable discharging of multiple groups of positive and negative electrodes is achieved through multiple groups of single energy coupling capacitors and independent voltage doubling rectifier bridges which are connected in parallel.

The invention relates to the technical field of frequency converter harmonic control, in particular to a harmonic control method, system and device applied to a frequency converter, and the method comprises the steps: obtaining the current data of a rectification input side and an inversion output side of the frequency converter; obtaining the difference coefficient of the overall pulsation amplitude change of each period and the irregular coefficient of the corresponding pulsation time change, and further obtaining the harmonic influence coefficient of the rectification input side current of each period with the pulsation amplitude difference and irregular characteristics; calculating a deviation coefficient and a jitter abnormal coefficient of the inversion output side current of each period so as to obtain a harmonic influence coefficient of the inversion output side current of each period having waveform deviation and rapid jitter; therefore, the harmonic delay superposition interference coefficient is obtained, and the output current of the inverter is corrected in combination with the current data of the inverter output side. The harmonic control precision of the frequency converter can be improved.

An integrated circuit for a power supply circuit that generates an output voltage from an AC voltage. The power supply circuit includes a full-wave rectifier circuit rectifying the AC voltage, a filter receiving the rectified voltage, an inductor receiving a voltage from the filter, and a transistor controlling an inductor current flowing through the inductor. The integrated circuit is configured to switch the transistor, and comprises: a terminal configured to receive a first voltage corresponding to a sum of a first current, which flows from the filter to a ground, and the inductor current; and a switching control circuit configured to turn on the transistor in response to the inductor current becoming smaller than a predetermined value, and turn off the transistor such that a peak value of the sum and the rectified voltage have waveforms that are in phase, and are proportional in amplitude, to each other.

A radio frequency to direct current (RF-DC) converter for harvesting radio frequency energy includes an antenna circuit, and a plurality of cross-coupled differential-drive (CCDD) rectifier stage. The antenna circuit receives RF signals and outputs a positive signal at a positive RF terminal and outputs a negative signal output at a negative RF terminal. Each CCDD rectifier stage includes a first NMOS transistor, a first PMOS transistor, a second NMOS transistor and a second PMOS transistor. Each CCDD rectifier stage further includes two flying capacitors and two body capacitors. An input terminal is connected to a connection point between a source terminal of the first NMOS transistor and a source terminal of the second NMOS transistor. An output terminal is connected to a connection point between a source terminal of the first PMOS transistor and a source terminal of the second PMOS transistor.

The invention provides a charging station rectifier cabinet power distribution method and system, and the method comprises the steps: building a first pre-distribution power path between each charging gun in a plurality of charging guns in charging and a direct connection power module, and obtaining a first pre-distribution power path set; determining a second pre-distribution power path set of the charging gun in each charging process to obtain a plurality of second pre-distribution power path sets; processing the first pre-allocated power path set and the plurality of second pre-allocated power path sets according to a preset power module scheduling priority ranking strategy to obtain a third pre-allocated power path set meeting a preset power sum constraint condition; and according to the third pre-distributed power path set, updating the electric connection relationship between the plurality of charging guns in charging and the plurality of power supply modules. The method can effectively solve the problem of path blockage when the multiple charging piles share the rectifier cabinet, and facilitates the improvement of the power utilization rate.

A transient voltage suppressor (TVS) device includes a silicon controlled rectifier (SCR) as the clamp device between a high-side steering diode and a low-side steering diode. The SCR includes alternating emitter and base regions arranged interleaving in a direction along a major surface of a semiconductor layer and orthogonal to a current path of the SCR. The TVS device realizes low capacitance and high holding voltage at the protected node.

The invention discloses a single-load wireless power transmission system with single transmitting and double receiving coils and a method thereof. The system comprises a direct-current power supply, a high-frequency inverter, a transmitting end compensation topology module, a transmitting coil module, two receiving coil modules, two receiving end compensation topology modules, a rectifier module, a filter capacitor and a system load module. The topological structure adopts S-LC and S-LCC compensation topology, and a topological structure parameter optimization method is provided, so that the anti-offset characteristic of the system is effectively improved. The optimized system can realize the stability of the output power of the system under the working conditions of offset and load change within a certain range. According to the system, the cost of the system is reduced, the high anti-offset capability can be achieved, the output power is stable, and the overall efficiency of the system is improved.

The invention provides a radio frequency energy collection assembly and system. The radio frequency energy collection assembly comprises at least two radio frequency rectification modules, an energy storage module and a DC-DC conversion module. The at least two radio frequency rectification modules are connected in parallel with each other, are connected with the energy storage module, and are used for outputting energy to the energy storage module; the energy storage module is connected with the DC-DC conversion module and is used for providing energy for the DC-DC conversion module; wherein each radio frequency rectification module comprises a rectifier and a controller, the rectifier comprises a transistor set, and the controller is used for disconnecting the transistor set when electric leakage of the rectifier is detected so as to stop electric leakage of the rectifier. According to the invention, the problem that different channels influence each other when the power is unbalanced can be solved.

The invention discloses a nonlinear Hall terahertz rectifying device which comprises a substrate, an oxide layer, an absorption layer and an electrode from bottom to top. The substrate is made of intrinsic high-resistance silicon, the oxide layer is made of silicon dioxide, the absorption layer is a Weel semimetal film, and the electrode is a four-end metal electrode. The Weel semimetal thin film is a niobium iridium tellurium (NbIrTe4) thin film. A cross-shaped structure is etched on the niobium-iridium-tellurium thin film, and a four-end metal electrode is manufactured through electron beam exposure, electron beam evaporation and a stripping technology. According to the invention, a simple cross-shaped geometric structure on Weel semimetal is utilized to couple an oscillating terahertz light field radiated along the longitudinal direction, and the generation of a direct current electric signal at the transverse end is realized through a nonlinear Hall effect induced by the Bell curvature, and the process does not involve the help of any external field. According to the invention, the broadband terahertz response of 0.02-0.82 THz is realized, the power consumption is low, and integration is facilitated.

The invention discloses a CLLLC converter light load efficiency improvement and load expansion circuit based on variable resonant cavity regulation and control and a control method thereof. The circuit comprises a primary side full bridge, a variable resonant cavity, a secondary side rectifier and an output loop, the digital control unit detects the load in real time, and drives and switches the parallel or series capacitor branch to adjust the equivalent resonant capacitor; and the auxiliary buffer branch is used for soft start and sudden change buffer. According to the control method, capacitance is reduced during light load, efficiency is improved, capacitance is increased during heavy load, gain linearity is kept, the load range is widened, and smooth starting is achieved. The device is compact in structure and easy to control, the light load efficiency can be remarkably improved, the load application range is expanded, and the device has high reliability and good industrialization prospects.

The invention relates to the technical field of aero-engines, and discloses a labyrinth leakage rate test device and method suitable for low Reynolds number flow, the test device comprises an air inlet section, a labyrinth stator ring, a labyrinth rotor disc, an exhaust section and a flow meter, the tubular rectifier is mainly composed of a plurality of rectification circular tubes which are adjacent to one another. According to the invention, the tubular rectifier is arranged in the exhaust section, the flow leaked by the test labyrinth is rectified by using the tubular rectifier, and then flow measurement is carried out, so that measurement errors caused by airflow rotation and uneven airflow distribution under the condition of low Reynolds number can be inhibited; therefore, the flow measurement accuracy of the leakage airflow under the condition of the low Reynolds number is improved, a labyrinth flow characteristic test under the condition of the low Reynolds number can be conveniently and effectively carried out, labyrinth sealing design and accurate analysis of the leakage rate under the condition of the low Reynolds number are supported, and the problem that an existing labyrinth leakage analysis method is large in error under the condition of the low Reynolds number is avoided.

A displacement-sensing Doppler radar with ultra-low noise and high sensing resolution is provided. The radar includes N two frequency synthesizers to respectively generate, at different frequencies, a transmitted signal that is radiated toward a target object, and a local oscillator (LO) signal. The radar further includes a mixer and a rectifier to: (1) receive a returned signal from the target object carrying phase delays corresponding to detected displacements of the target object; (2) mix the returned signal and the LO signal to generate a down-converted sine-wave intermediate frequency (IF) signal; and (3) rectify the sine-wave IF signal to a square-wave IF signal, which also carries the displacement-induced phase delays. The radar also includes a phase demodulation module to convert the displacement-induced phase delays into a pulse-modulated signal. The radar further includes a low-pass filter to convert the modulated pulse signal into an output voltage signal indicative of the detected displacements.

A power converting apparatus includes a rectifier unit that rectifies first alternating-current power supplied from a commercial power supply, a capacitor connected to an output end of the rectifier unit, an inverter connected across the capacitor to generate second alternating-current power and output the second alternating-current power to a motor, and a control unit that controls an operation of the inverter and an operation of the motor using a dq-rotational coordinate system rotating in synchronization with a rotor position of the motor. The control unit extracts multiple frequency components from a q-axis current pulsation, which is a pulsatile component of a q-axis current, and limits the amplitude value of each of the extracted frequency components to control the amplitude of the q-axis current pulsation.

The charging pile rectification module extraction type structure comprises a charging pile body and a rectification module, the charging pile body is provided with an inner cavity and a first opening located in the outer side wall, a vertically-arranged middle partition plate is arranged in the inner cavity, and the inner cavity is divided into a rectification chamber and a maintenance chamber through the middle partition plate; the first opening communicates with the rectifying chamber, and the opening direction of the first opening is the same as the length direction of the charging pile body; and at least two bins arranged at intervals in the height direction of the charging pile body are arranged in the rectification chamber. According to the extraction type structure of the charging pile rectifier module designed by the invention, a plurality of independent bins are separated by arranging a plurality of standardized partition plate units, so that the manufacturing cost is reduced, and rapid plugging and maintenance of the rectifier module are realized, and each rectifier module can independently slide in or out from the outside of the charging pile; parameter setting is directly carried out at the rear end, and convenience and rapidness are achieved.

The invention discloses a low-loss double-reverse-star rectifier transformer for a hydrogen production system, and relates to the technical field of double-reverse-star rectifier transformers, the low-loss double-reverse-star rectifier transformer comprises a box body, cooling fins, a coil, a connector lug, a supporting box and a cooling module, the cooling fins are installed on the outer wall of the box body, the coil is installed on the inner wall of the box body, the connector lug penetrates through the top of the box body, and the supporting box is arranged in the box body. One end of the connector lug is connected with the outer wall of the coil, and a supporting box is installed on the outer wall of the box body. The oil pump is started to suck transformer oil in the box body into the continuous bow-shaped pipe, at the moment, the first fan is started to generate wind power to blow to the surface of the continuous bow-shaped pipe, so that the transformer oil in the continuous bow-shaped pipe is cooled, and the cooled transformer oil enters the box body again through the discharge head; at the moment, a first motor rotates to drive a first beating head to rotate, the first beating head rotates to drive a T-shaped frame to move, the T-shaped frame moves to drive a first spring to move, and the first spring moves to enable the T-shaped frame to drive a ram to move.

The furnace body structure comprises a furnace body, the upper end of the furnace body is open, the interior of the furnace body is of a hollow structure, and a positive conducting strip is connected between the furnace body and a rectifier cabinet; an anode graphite sheet is arranged on the inner wall of the electrolytic tank; the metal collecting device is positioned in the electrolytic bath; the furnace body is provided with a panel set used for installing conducting strips, and the panel set is provided with a cooling structure used for cooling the conducting strips. Compared with the prior art, the utility model has the beneficial effects that: 1, the panel group is arranged on the furnace body, and the cooling structure is arranged in the panel group, so that when the panel group cools the furnace body, the cooling structure can specifically cool the part of the conducting strip and quickly absorb the heat of the conducting strip; multiple layers of heat insulation boxes are arranged for heat preservation, heat in the electrolytic furnace is stored, meanwhile, heat insulation is conducted on the surface of the electrolytic furnace, and the heat utilization efficiency is improved.

The invention discloses intelligent air supply equipment and an air conditioner, and belongs to the technical field of air conditioner air supply. The device comprises a device shell, an air supply pipeline arranged in the device shell, an upper cut-off plate and a lower cut-off plate, an axial flow fan for supplying air inwards is arranged at the top of the device shell, arc-shaped holes are formed in the upper cut-off plate and the lower cut-off plate in a staggered mode, and a driving device is arranged at the top of the upper cut-off plate. The driving device drives the rotating shaft to drive the upper cut-off plate and the lower cut-off plate to rotate synchronously, so that when the arc-shaped hole of the upper cut-off plate coincides with the air inlet of the air supply pipeline, the arc-shaped hole of the lower cut-off plate and the air outlet of the air supply pipeline are in a closed state; a rectifying cylinder is arranged in the air supply pipeline, a rectifying mounting plate is arranged at the top of the air supply pipeline, and a plurality of air resistance rectifiers are arranged on the rectifying mounting plate from outside to inside in the circumferential direction; the cut-off plates are arranged at the upper position and the lower position of the air supply pipeline correspondingly, and the lower cut-off plate and the upper cut-off plate have the angle difference, so that the lower pause time is achieved.

The invention discloses a notebook computer waste heat recycling system and method based on a thermoelectric conversion effect, and relates to the technical field of thermoelectric materials and devices, and the system comprises a distributed thermoelectric array module which is composed of a plurality of miniature TEG units, is distributed in a high heating area of a notebook computer, and directly generates power through temperature difference; the self-adaptive heat management module comprises a heat-conducting silica gel layer and micro heat dissipation fins and is used for optimizing the temperature difference between the hot end and the cold end; the multi-stage electric energy management module comprises a rectifying circuit, a DC-DC boosting chip and a recycling energy storage battery device, converts the unstable low-voltage direct current output by the TEG into stable electric energy, stores the stable electric energy and supplies the stable electric energy to target equipment; and the intelligent control module dynamically adjusts the working area of the micro thermoelectric power generation unit according to the data of the temperature sensor, preferentially selects the position with the maximum temperature difference to generate power, and matches the power supply demand through a PMIC chip. Efficient conversion and utilization of waste heat are realized through innovative design, the problem of low thermoelectric conversion efficiency in miniaturized equipment is solved, and energy conservation and environmental protection are realized.

The invention relates to the technical field of wireless charging, in particular to an underwater magnetic coupling resonant wireless power transmission voltage stabilization control system and method, and the system comprises a transmitting end which comprises a power supply, an inverter circuit, a transmitting end compensation network and an array type orthogonal magnetic coupling device, and the array type orthogonal magnetic coupling device comprises four DD type coils, the DD type coils are alternately wound to generate a horizontal magnetic field and a vertical magnetic field; the receiving end comprises a biorthogonal coil, a receiving end compensation network, a rectification filtering module and a converter; the biorthogonal coil receives energy of the horizontal magnetic field and the vertical magnetic field; the linear active disturbance rejection control module comprises an extended state observer and a linear feedback control rate, the extended state observer is used for estimating the total disturbance of the system in real time and performing feed-forward compensation, and the linear feedback control rate realizes voltage stabilization by adjusting the duty ratio of the converter. The system adapts to a deep sea complex environment, and the cruising ability of the AUV is improved.

This disclosure is directed to a circuit that includes a substrate, a target device on the substrate, and an electrostatic discharge (ESD) device electrically coupled to the target device. The ESD device includes an ESD detection circuit electrically coupled to a first reference voltage supply and a second reference voltage supply, an inverter circuit electrically coupled to the ESD detection circuit and configured to trigger in response to an ESD event on the first or second reference voltage supply, a rectifier circuit electrically coupled to the inverter circuit and configured to rectify a current discharged from the inverter circuit, and a transistor electrically coupled to the rectifier circuit and configured to discharge a remaining current passing through the rectifier circuit.

An electronic device includes a wireless charging receive coil configured to transduce, into an alternating current (AC) power signal, a magnetic field generated by a wireless charging transmit coil of an external device; an active rectifier configured to convert the AC signal received at an AC side of the active rectifier into a direct current (DC) power signal output at a DC side of the active rectifier, the active rectifier comprising a plurality of switches; a first modulation capacitor connected to an upper rail of the AC side; a second modulation capacitor connected to a lower rail of the AC side; and a controller configured to adjust an impedance of the computing device to communicate with the external device by at least controlling the plurality of switches to cause the first modulation capacitor and the second modulation capacitor to charge during separate time periods.

The invention discloses a fault diagnosis method for an H-bridge half-controlled rectifier of an electro-magnetic doubly salient generator, and relates to the field of electro-magnetic doubly salient generators, the method is developed based on an improved H-bridge half-controlled rectifier topological structure, and the improved H-bridge half-controlled rectifier topological structure is additionally provided with a current sensor for each phase of armature winding. The leads of the left and right bridge arms connected with each phase of armature winding are wound on the current sensor in a winding manner, so that each phase of current sensor can obtain more current information; open-circuit fault diagnosis can be realized through current measured by a current sensor wound by a working two-phase armature winding in each sector, the method is small in calculation amount and easy to realize, is not influenced by rotating speed or load change, is also not influenced by fault occurrence positions and conduction angle change, can realize single-tube, double-tube and multi-tube fault positioning, and can be applied to the field of fault diagnosis. The diagnosis effect is good; and the application range is wide.

The active clamping circuit comprises a first energy storage element, a first branch circuit and a second branch circuit, the first branch and the second branch are connected in parallel and then connected in series with the first energy storage element; the first branch comprises a second energy storage element, and the second branch comprises an auxiliary switch tube; when the clamping circuit is in a forward charging state, the first energy storage element and the first branch are conducted to form a clamping loop; the first energy storage element and the second energy storage element absorb leakage inductance energy of the primary winding through the clamping loop; and when the clamping circuit is in a reverse excitation energy charging state for the transformer, the first energy storage element and the second branch are conducted to form a reverse excitation loop. As the voltage at the two ends is the sum of the voltage of the first energy storage element and the voltage of the second energy storage element during forward charging of the clamping circuit and is only the voltage of the first energy storage element during discharging, and the excitation voltage is smaller than the reflection voltage of the secondary winding during reverse excitation of the transformer, a secondary rectifier tube cannot be switched on, energy forward shock to the secondary side is eliminated, and the voltage of the secondary side is reduced. Therefore, the loss is reduced.

The invention provides a wide-voltage intelligent control large-current contactor. Comprising a wide voltage control module which is composed of a rectifier bridge, a voltage acquisition module, a single-chip microcomputer control system and a DCDC conversion module and is used for converting input AC / DC voltage into stable 24VDC output; the wide-current control module is used for controlling the coil to start, the contactor can be in a working state even if power failure occurs, the stability of a power grid is ensured, and the device can be applied to the fields of uninterruptible power supply control cabinets, photovoltaic energy storage, power grid distribution and the like.

The utility model discloses a voltage-multiplying rectifying device with an integrated heat dissipation structure, which is used for a high-power electric flame stove and comprises a plurality of PCBs (printed circuit boards) and bolt studs, the PCBs are sequentially arranged in a layered manner from top to bottom, and the bolt studs are arranged among the PCBs. Gaps for heat dissipation are reserved between the layers of PCBs, and meanwhile, the blank of each PCB is hollowed out. According to the utility model, the plurality of PCBs are sequentially arranged in a layered manner from top to bottom, so that the voltage doubling rectifier module is integrated, the occupied space is saved, and the centralized heat dissipation is simple; in addition, gaps for heat dissipation are reserved between the PCBs, and the blank of each PCB is hollowed out, so that the LED lamp is good in ventilation and ideal in heat dissipation effect. Compared with the prior art, a radiator does not need to be installed, and the heat dissipation effect is better than that of the prior art.

A self-excitation motor disclosed by the present invention comprises a rotor, a first end of the rotor is equipped with a rectification circuit, the rotor comprises a rotor iron core and a plurality of harmonic windings and excitation windings, the rotor iron core is provided with rotor teeth, and each harmonic winding and each excitation winding are respectively wound on the corresponding rotor teeth. Each harmonic winding comprises a first harmonic winding and a second harmonic winding, the winding directions of the first harmonic winding and the second harmonic winding are the same, star connection is adopted, one ends of the first harmonic winding and the second harmonic winding are connected in series in a one-to-one mode, and the other ends of the first harmonic winding and the second harmonic winding are jointly connected to form a star neutral point; the other end of each second harmonic winding is connected with the midpoint of each bridge arm in the rectifying circuit in a one-to-one manner; the winding directions of the excitation windings on every two adjacent rotor teeth are opposite, and the two ends of each excitation winding are electrically connected with the direct current output end of the rectification circuit. This induces and rectifies the current for excitation more efficiently. The invention further provides a motor control strategy based on high-frequency harmonic current phase optimization.

The utility model discloses a semiconductor rectifier injection molding packaging device which comprises an upper mold, a lower mold, a base, a supporting column, a protective cover, a material injection pipe, a first air cylinder, a piston, a sealing plate, an upper cylinder body, a lower cylinder body, a metal telescopic sleeve, an annular hanging frame, a connecting rod, a second air cylinder and a circulating cooling water pipe. The four supporting columns are distributed in a rectangular mode, the upper ends and the lower ends of the supporting columns are fixedly connected with the upper mold and the base respectively, the lower mold is slidably installed on the supporting columns, and the lower mold and the upper mold are matched to form a plastic packaging mold cavity. Hot resin in the lower cylinder body is extruded through downward expansion of the metal telescopic sleeve and is injected into the plastic packaging mold cavity through the material injection pipe and the pouring gate for plastic packaging operation, the requirement for the machining precision of the piston, the inner hole of the upper cylinder body and the inner hole of the lower cylinder body can be lowered, and therefore the machining cost can be lowered; the piston cannot be blocked when the piston moves up and down and the metal telescopic sleeve does stretching / contracting movement, and the piston has the advantages of being high in use reliability and long in service life.

The invention discloses a high-voltage discharge circuit suitable for a storage battery power supply and an electric flame stove. The high-voltage discharge circuit comprises an inversion driving module, a boosting transformer T1, at least three groups of active bridge rectifier modules and discharge modules corresponding to the active bridge rectifier modules. Through combination of driving of the active bridge rectifier module, voltage / current double-closed-loop feedback and real-time PWM signal output control of the control chip U1, current difference of each discharge branch is eliminated, the problem of uneven branch current is solved, and ring current and reactive power loss between branches are eliminated; a diode in a voltage doubling rectifying circuit and a bleeder resistor of a resonance circuit in the prior art are abandoned, an active bridge type rectifying module is adopted for driving, a PWM signal is dynamically adjusted through the low ESR characteristic of a capacitor C1 and closed-loop control, extra power loss is avoided, the working temperature of the circuit is controlled to be below 85 DEG C, and the service life of the circuit is prolonged. And the continuous service life of components in the circuit is prolonged.

A power receiver (301a, 301b, 301c, 301d, 301e, 301f) is disclosed herein. In a specific embodiment the power receiver has a first electrode (300) arranged to be electrically coupled to a body (105) of a living being, the first electrode (300) operable to receive an electrical signal via the body; and a rectifier (307) for rectifying the electrical signal into a rectified electrical signal. The rectifier (307) includes a plurality of rectifier switches and operable in a bulk biasing mode in which first selected rectifier switches of the plurality of rectifier switches are forward bulk biased. A power transmitter (201), an energy transfer apparatus (100) and a method of transmitting electrical power are also disclosed.

The invention provides a top structure of a high synchronous test number tester, which comprises a load plate, and two groups of socket assemblies are symmetrically arranged on the load plate. A plurality of signal connectors are arranged around each group of socket assemblies; the socket assembly comprises a plurality of chip sockets; a socket supporting plate, a rectifying plate and an airtight box are sequentially arranged below the load plate corresponding to the socket assembly from top to bottom; a through air inlet is formed in the bottom of the airtight box; air inlet flow channels are uniformly formed in the bottom surface in the airtight box and are communicated with the air inlet; a plurality of air uniformizing holes penetrate through the rectifying plate; the air uniformizing holes are formed above the air inlet flow channel and are communicated with the air inlet flow channel; a plurality of first vent holes are formed in the socket supporting plate in a penetrating manner, and the first vent holes are communicated with the space above the rectifying plate; a plurality of second vent holes are formed in the load plate in a penetrating mode, a third vent hole is formed in each chip socket of the socket assembly in a penetrating mode, and when the socket assembly is installed on the load plate, the second vent holes are communicated with the third vent holes in a one-to-one correspondence mode.