16results about How to "Improve power conversion efficiency" patented technology

The invention belongs to the technical field of photovoltaic panels, and particularly relates to an energy-saving elevator photovoltaic panel mounting structure which comprises a base station, a side wall is fixedly connected to one side of the base station, two outer stand columns are fixedly connected to the corners of the base station, and two symmetrical vertical shafts are arranged between the two outer stand columns. A vertical shaft is arranged between each outer stand column and the side wall and close to the outer stand column, multiple sets of second shaft seats are fixedly connected to the two outer stand columns, a photovoltaic panel frame is rotationally connected between each set of second shaft seats, and multiple first shaft seats are fixedly connected to the two inner stand columns close to the outer stand columns. Each first shaft seat is rotationally connected with a frame seat rotationally connected with the vertical shaft, each frame seat is rotationally connected with a photovoltaic panel frame, and the outer side of each photovoltaic panel frame is fixedly connected with a photovoltaic panel. The horizontal angle and the vertical angle of the photovoltaic panel frame and the photovoltaic panel are adjustable, so that the photovoltaic panel can be located at the optimal sunlight incident angle, the electric energy conversion efficiency of the photovoltaic panel is improved, the generating capacity is improved, and then the energy-saving effect is improved.

This utility model discloses a transmission connection structure between an engine and a gearbox. This transmission connection structure connects the engine's output shaft to the gearbox's input shaft. The structure includes a housing, a slider, a rotating block, a clutch block, and a drive mechanism. The housing is mounted on the gearbox, the slider is slidably mounted inside the housing, the drive mechanism is mounted on the housing with one end extending into the housing and driving the slider to move within it, the rotating block is rotatably mounted inside the slider, and the clutch block is mounted in the inner cavity of the slider. The head of the input shaft is a perforated shaft that slides into a perforated groove in the rotating block, and the head of the output shaft is fitted to the clutch block. This transmission connection structure can replace the use of a vehicle clutch in agricultural machinery, providing a clutch effect. Furthermore, when disconnecting the power transmission between the engine and the gearbox, the input shaft experiences no additional load, improving power conversion efficiency. This structure is simple, easy to operate, suitable for agricultural machinery with simple transmissions, and also reduces costs.

This invention discloses an acid gas purification system based on dual high-speed permanent magnet explosion-proof centrifugal compressors, comprising an absorption purification system, an energy-saving flash evaporation system, and a heat pump distillation regeneration system. The flash tank of the energy-saving flash evaporation system is connected to a #1 demister; the outlet of the #1 demister is connected to the inlet pipe of the #1 high-speed permanent magnet explosion-proof centrifugal compressor, and the outlet pipe of the #1 high-speed permanent magnet explosion-proof centrifugal compressor is connected to the hot-side inlet pipe of the flash evaporator heat exchanger. The feed pipe at the top of the distillation column of the heat pump distillation regeneration system is connected to the cold-side outlet pipe of the bottom liquid heat exchanger; the distillation column is connected to a #2 demister; the outlet pipe of the #2 demister is connected to the inlet pipe of the #2 high-speed permanent magnet explosion-proof centrifugal compressor, and the outlet pipe of the #2 high-speed permanent magnet explosion-proof centrifugal compressor is connected to the shell inlet pipe of the reboiler. This invention fully utilizes the energy of the acid gas purification process, greatly improving the heat utilization rate of flash vapor, distillation column top gas phase, and bottom liquid, resulting in significant energy saving and consumption reduction.

This invention discloses an unmanned intelligent photovoltaic green electricity distribution device for mines, featuring source-grid-load-storage coordination. The device includes a base, with a nested shock-absorbing assembly at the top. Above the nested shock-absorbing assembly is an energy storage distribution box. An energy storage interface compartment is connected to the left side of the energy storage distribution box, and a distribution control box is located on the right side. A flexible connection assembly is positioned above the energy storage distribution box, and a source-grid adapter box is located above the flexible connection assembly. A dual-path photovoltaic rectifier compartment is located on the left side of the source-grid adapter box, and a mine microgrid connection compartment is located on the right side. Utilizing the dual-path photovoltaic rectifier compartment within the source-grid adapter box, synchronous conversion of two photovoltaic DC power sources is achieved, improving power conversion efficiency and filtering power noise. The mine microgrid connection compartment integrates voltage regulation and lightning protection functions, enabling efficient connection with the mine microgrid.

The application discloses a mine-used four-way explosion-proof and intrinsic safety type direct-current power supply with a communication function, which comprises five non-intrinsically safe AC_DC modules and DC intrinsic safety circuits connected with the non-intrinsically safe AC_DC modules, and is recorded as non-intrinsically safe AC_DC module 0-non-intrinsically safe AC_DC module 4. The non-intrinsically safe AC_DC module 0 is responsible for power supply of a power management module. Two power supplies of the non-intrinsically safe AC_DC module 1 and the non-intrinsically safe AC_DC module 2 are converged through the power management module to form a double-path power supply A. Two power supplies of the non-intrinsically safe AC_DC module 3 and the non-intrinsically safe AC_DC module 4 are converged through the power management module to form a double-path power supply B. The double-path power supply A is fused with a CAN bus and a vehicle-mounted Ethernet unit into an 8-core composite cable. The double-path power supply B is fused with another CAN bus and the vehicle-mounted Ethernet unit into an 8-core composite cable. The power supply internally adopts a four-way power supply parallel mode, can realize power supply with a larger power, has a higher power conversion efficiency, has a lower heat generation, and improves the safety of the power supply system.

This invention provides a wide-bandgap perovskite thin film, a perovskite tandem solar cell, and a method for preparing the same, relating to the field of photovoltaic technology. The method for preparing the perovskite thin film includes: adding a perovskite structural material and an organic additive to an organic solvent to obtain a perovskite precursor solution; spin-coating the perovskite precursor solution onto a substrate; and annealing the substrate to obtain the perovskite thin film. The organic additive includes a material containing a thiophene dioxide framework. The organic additive used in this invention can effectively regulate the crystallization rate of mixed halides, delay crystallization, enhance the uniform distribution of the mixed halide phase, reduce the defect density in the wide-bandgap perovskite thin film, and significantly improve the power conversion efficiency and stability of the solar cell, thereby obtaining a high-performance tandem solar cell.

The application provides a droop control method and device for an energy storage system in a direct-current microgrid, and the method comprises the following steps: obtaining an initial droop curve; determining a boundary condition of a droop control parameter in the droop curve; establishing a target function with the highest cycle efficiency of the energy storage system in full charging and full discharging as a target; establishing a droop curve optimization model according to the target function and the boundary condition; solving the droop curve optimization model to obtain an optimal solution of the droop control parameter, so as to update the initial droop curve; and controlling the energy storage system by using the updated droop curve. The application can improve the power conversion efficiency of the energy storage system, and improve the economy and service life of the energy storage system and even the entire direct-current microgrid.

The application relates to a flexible charging module control method and device supporting V2G, comprising the following steps: determining whether there is a hard switching risk according to the comparison result of the load power value and the preset threshold value; in the case that there is a hard switching risk, adjusting the resonant frequency of the CLLL topology to the first frequency interval based on a frequency-duty cycle hybrid modulation strategy, making the resonant current phase and the switch tube voltage phase form a preset phase difference, and adjusting the drive signal duty cycle of the primary side switch tube and the secondary side switch tube, so that the conduction time difference of the primary side switch tube and the secondary side switch tube increases with the decrease of the load power value; based on an adaptive frequency spectrum expansion algorithm, the resonant frequency is periodically dithered in the first frequency interval with a preset step, and the dithering period and the switching period of the switch tube are in a nonlinear mapping relationship; the bidirectional power conversion efficiency is improved, the light load hard switching and electromagnetic interference problems are solved, and the reliable operation of the charging module in the V2G scene is ensured.

The utility model relates to the technical field of power supply voltage regulation circuits, and provides a one-way fan direct-current voltage regulation and speed regulation circuit which comprises a direct-current voltage reduction circuit connected with a PWM / DAC weight regulation circuit used for controlling the speed of a direct-current fan. And the step-down chip U1 is arranged in the direct-current step-down circuit and is used for realizing a step-down function in the direct-current step-down circuit. According to the circuit, a direct-current voltage reduction and speed regulation control strategy is optimized, continuity and stability of output voltage are ensured, the common voltage jitter problem in a traditional scheme is avoided, the circuit design effectively suppresses reverse electromotive force, the reliability and safety of a system are improved, meanwhile, the scheme improves the power conversion efficiency, heat is reduced, and the service life of the system is prolonged. The speed regulation control mode is simplified, smooth fan speed regulation is achieved, and the user experience and the energy utilization efficiency are remarkably improved.

The utility model discloses a rectification voltage stabilizing circuit based on 555 timer and reference voltage chip relates to power supply circuit technical field, the circuit in the utility model, provide stable reference voltage through reference voltage chip, according to the duty cycle of the output pulse of comparison result adjustment, can realize the high precision voltage stabilizing output, satisfy the power supply demand of high precision electronic equipment, utilize common 555 timer and reference voltage chip, compared with the dedicated voltage stabilizing chip, the cost is reduced obviously, has higher cost performance, is suitable for large -scale production and application, through the output signal in control 555 timer module, can conveniently adjust output voltage, to adapt to the demand of different load and application scene to voltage, the PWM circuit of 555 timer composition can realize higher power conversion efficiency, reduce power loss, improve the overall performance of circuit.

A flyback converter with a demagnetization signal, a switching control circuit and a control method. The flyback converter includes a first transistor for switching a transformer to generate a primary side switching current and an output voltage, and a second transistor for generating a circulating current to achieve zero voltage switching of the first transistor. When the flyback converter determines that a preset number of switching cycles have been operated in a non-discontinuous conduction mode according to the primary side switching current, the flyback converter actively forces at least one switching cycle to operate in a discontinuous conduction mode. The flyback converter generates a demagnetization signal, wherein the demagnetization signal simulates a demagnetization period of the transformer to control the second transistor during the non-discontinuous conduction mode, and wherein the flyback converter corrects the demagnetization signal according to the demagnetization period during the actively forced discontinuous conduction mode.

This application relates to a portable, self-shielded electron accelerator irradiation device for wastewater treatment, comprising: a portable housing as the main body; an electron accelerator disposed within the portable housing for providing an irradiated electron beam; a wastewater processor disposed within the portable housing and located below the irradiation window of the electron accelerator for receiving the irradiated electron beam and treating wastewater; a sub-beam tank connected to the wastewater processor and located below the electron accelerator for receiving the treated wastewater; a control system disposed within the portable housing and connected to the electron accelerator for controlling the operation of the electron accelerator; and a shielding body that at least covers the irradiation window and the wastewater processor, for at least shielding the irradiation energy of the irradiation window and the wastewater processor. This device is portable and offers significant convenience and efficiency for wastewater treatment.

This invention relates to the field of integrated design of power electronic converters and magnetic components, and discloses an application method of three-phase PFC integrated magnetic technology, including: configuring excitation windings in the independent magnetic circuit branches of the magnetic core so that the excitation currents of each phase differ by a phase angle of 120° on the time axis; establishing a magnetic flux balance path in the common area inside the magnetic core, and forming a virtual magnetic neutral point with equal magnetic potential by utilizing the spatial vector synthesis and instantaneous polarity cancellation of the fundamental magnetic flux; setting a non-uniform magnetoresistive layer between the side column and the middle column to establish a gradient magnetoresistive distribution field, guiding the high-frequency ripple magnetic flux to be constrained within a specific leakage magnetic path, and orthogonally distributed with the main energy conversion path in electromagnetic space. This invention achieves electromagnetic decoupling of the inductance parameters of each phase of the integrated magnetic component by constructing a virtual magnetopotential zero point and orthogonal magnetic circuits, maintaining the independence of dynamic response, eliminating cross-phase parameter disturbances, and reducing the overall volume of the magnetic component.

This invention discloses a stacking inductor for induction brazing, comprising a hollow copper tube, a fiberglass sleeve, a PTFE insulating sheet, and an inductor base. The hollow copper tube is the core component, fixed end-to-end to the base and wound in the middle to form a ring-shaped heating port with three inner and two outer sections, used to transmit high-frequency current and create a uniform magnetic field. The fiberglass sleeve and PTFE insulating sheet provide electrical insulation and high-temperature resistance. The symmetrical structure of the base ensures stability. This invention achieves rapid workpiece heating through electromagnetic induction, offering advantages such as fast heating, high precision, energy saving, environmental friendliness, and safety and reliability. It is suitable for precision welding processes in the refrigeration industry and related manufacturing fields.

The application discloses a photovoltaic device and a preparation method thereof, and belongs to the technical field of photovoltaic devices. The photovoltaic device comprises, from bottom to top, a substrate, an electron transport layer, a YbBr3 spin-coated modified PbS-PbX2 quantum dot layer, a PbS-EDT layer and a metal layer. In the photovoltaic device, YbBr3 is spin-coated on the surface of a PbS-PbX2 quantum dot layer after halogen ligand exchange is completed, so that Yb 3+ / Br ‑ forms an ionic coordination bond on the surface of PbS; first, by utilizing the quantum confinement characteristics of Yb 3+ , two 980 nm near-infrared photons are emitted after visible light with higher energy is absorbed, and then the photons are absorbed by adjacent PbS quantum dots again, so that the utilization rate of the photons is improved, and the short-circuit current and overall power conversion efficiency are significantly improved; second, Yb 3+ / Br ‑ passivates the surface vacancy defects, reduces the surface trap density, prolongs the carrier lifetime, improves the open-circuit voltage and the fill factor.

The utility model provides a permanent-magnet coreless dual-rotor motor, which comprises a casing, a first permanent-magnet rotor, a second permanent-magnet rotor, a stator winding, a cover and a central shaft. The first permanent magnet rotor is embedded in the inner side of the machine shell, the second permanent magnet rotor is embedded in the inner side of the machine cover, the stator winding is installed between the first permanent magnet rotor and the second permanent magnet rotor, the machine shell and the machine cover are fixedly installed in a buckled mode, and the first permanent magnet rotor, the second permanent magnet rotor and the stator winding are wrapped. The center shaft sequentially penetrates through the machine cover, the second permanent magnet rotor, the stator winding, the first permanent magnet rotor and the machine shell, and the center shaft and the stator winding are fixedly installed. The double-face electromagnetism of the stator winding is fully utilized, the utilization rate of the electromagnetism is remarkably improved, stronger driving force can be provided, and the electric energy conversion efficiency is improved.