33results about How to "Reduce power density" patented technology

The invention relates to the technical field of mine underground positioning, and discloses a UWB-based coal mine underground accurate positioning system, which comprises a UWB base station, a UWB label, a central processing unit and a data transmission network, and is characterized in that the UWB base station is installed on a monorail hoist and is used as a signal receiver, the UWB label is fixed on a wall or a ceiling of a roadway and is used as a signal transmitter, and the central processing unit is used as a signal receiver. The central processing unit is responsible for receiving data from the UWB tag, executing a PDOA algorithm and calculating the position of the monorail hoist, and the data transmission network is used for data exchange between the base station and the tag and between the tag and the central processing unit. The monorail hoist can be quickly positioned, and rescue action is facilitated.

The invention provides a power main transformer structure. The power main transformer structure comprises a magnetic core, a first framework, a second framework, a primary winding and a secondary winding. The magnetic core comprises a magnetic column, the first framework and the second framework are arranged on the magnetic column in a sleeving mode, and the first framework is arranged on the outer side of the second framework in a sleeving mode. One of the primary winding and the secondary winding is wound on the first framework, and the other one is wound on the second framework. A gap is formed between the first skeleton and the second skeleton. According to the invention, the first skeleton and the second skeleton sleeve the magnetic column and are arranged in an overlapped manner, so that it can be ensured that the transmission energy of unit turns is higher than that of non-overlapped arrangement, and meanwhile, the magnetic flux leakage is small, the precision is high, and the structure is suitable for various power levels. The first framework and the second framework are spaced, so that stray capacitance between the primary winding and the secondary winding is smaller, meanwhile, the gap is used for heat dissipation and ventilation, and the loss problem and the power density problem caused by heat dissipation can be effectively reduced.

The utility model discloses a casing and a motor, the casing comprises an inner casing, an outer casing and a first damping structure, the outer casing is sleeved outside the inner casing, the first damping structure is arranged between the inner casing and the outer casing, and the inner casing and the outer casing are arranged at an interval and are connected through the first damping structure. According to the technical scheme of the utility model, the technical problem of poor vibration and noise reduction effect of the existing motor vibration reduction mode is solved.

The invention discloses a slice laser based on a topological structure dodging layer. The slice laser comprises a pumping system, a pumping light injection module and a composite dodging waveguide structure, pumping light generated by the pumping system enters the composite dodging waveguide structure through the pumping light injection module; the front end face of the composite dodging waveguide structure is plated with a pumping light wavelength high-reflective film and a laser wavelength antireflection film, and the rear end face of the composite dodging waveguide structure is plated with a pumping source wavelength and laser wavelength high-reflective film; the composite dodging waveguide structure comprises a slice gain medium, a topological structure dodging layer and a middle refractive index layer which are sequentially arranged from the front end face to the rear end face. The topological structure dodging layer is composed of a low-refractive-index material layer and a high-refractive-index material topological graph arranged on the low-refractive-index material layer; and the pump light injection module is fixed above the high refractive index material of the middle refractive index layer or the topological structure dodging layer. Pumping uniformity is improved fundamentally, high-order mode suppression and efficient fundamental mode extraction are facilitated, and output power and light beam quality are improved at the same time.

A single-chip integrated full bridge relates to the technical field of semiconductors. Comprising a second isolation layer, an epitaxial wafer and a first isolation layer which are arranged in sequence, and the epitaxial wafer comprises a first lightly-doped N region, a second lightly-doped N region, a third lightly-doped N region and a fourth lightly-doped N region; four transverse conductive diodes are integrated on a chip, the first anode and the second cathode form metal interconnection and are connected to one end of an alternating current power supply, the third cathode and the fourth anode form metal interconnection and are connected to the other end of the alternating current power supply, and the third anode and the second anode form electrical interconnection through packaging or a PCB and are connected to one end of a load. The first cathode and the fourth cathode form electrical interconnection through packaging or a PCB and are connected to one end of a load, only one chip needs to be packaged, the area of the chip is effectively utilized, the use amount of the chip can be reduced by three quarters by using the full-bridge rectification chip in the scheme, and the power density is four times that of a traditional full-bridge device.

The invention discloses a high-efficiency selective laser sintering method, which comprises at least one mixture of raw material powder including a low-melting-point binder and at least one laser beam for selective laser sintering; the melting point of the binder is m p , the decomposition temperature is b p , so that the laser beam irradiates the raw material of the mixture, the highest temperature of the raw material rises to T, the duration of the temperature is t, and the following conditions are met: #imgabs0# and m p <T<b p , t>0; this method allows the temperature of a larger range of raw material powder to be maintained in the range from melting point to decomposition point for a certain period of time, while making the temperature distribution and gradient tend to be uniform, so that the residual stress and deformation after laser sintering are smaller; and the beam irradiation with a larger irradiation area also ensures the improvement of laser sintering efficiency.

The invention discloses an electrode structure in a flow battery, and particularly relates to an electrode structure with bionic fish gill design in the flow battery, and an electrode main body forms a gill cavity-like structure; the flow channel I is used for allowing electrolyte to flow into the gill-cavity-like structure; the flow channel II is used for the electrolyte in the gill-cavity-like structure to flow out; a gill arch-like structure is arranged in the gill cavity-like structure and is used for guiding electrolyte convection; the gill filament-like structure is used for diffusion and mass transfer of reactants; and the gill-like small sheet structure is used for providing a large number of electrochemical reaction sites. The technical problems that the 3D printing integrated electrode structure design integrates the structure and functional characteristics of a bipolar plate and a porous electrode in a traditional flow battery, the packaging difficulty and the contact resistance of an electric pile unit in the flow battery are reduced, and the power density and the energy efficiency of the flow battery are improved are solved. The electrode structure is simpler and more efficient to manufacture, large-scale production is facilitated, and the production cost is reduced.

The invention provides a semiconductor device and a preparation method thereof, the semiconductor device comprises a substrate, an epitaxial layer, a first well region and a source electrode, the epitaxial layer, the first well region and the source electrode are sequentially deposited on the substrate, a drain electrode is arranged below the substrate, a source region groove is formed in the first well region, and a source region is arranged in the source region groove; the epitaxial layer is provided with a groove, the groove penetrates through the first well region and the source region, the bottom and the side wall of the groove are provided with gate oxide layers, a first dielectric layer and a gate conductive layer are sequentially arranged in the groove, a second dielectric layer is arranged above the groove, and source electrodes are arranged on the two sides of the second dielectric layer. And the reliability of the device is improved.

The invention discloses an all-fiber high-power narrow-linewidth laser long-distance transmission system and method. The system comprises a narrow-linewidth laser, a pumping source, a pumping beam combiner, a gain fiber, a cladding light stripper, a coupling device, a double-core fiber and an output device. The laser outputs initial laser, the initial laser and pumping source light are injected into the gain optical fiber through the beam combiner to form high-power laser, the stripper removes residual pumping light, the coupling device guides the laser into the double-core optical fiber, the laser is periodically coupled between fiber cores to disperse power density and suppress stimulated Brillouin scattering, and finally the laser is shaped and output through the output device. System devices are connected through an optical fiber fusion splicer, a passive double-core optical fiber is replaced by an active double-core optical fiber and can be applied to an optical fiber amplifier, and long-distance stable transmission is achieved.

The utility model discloses a pre-target proton beam detection imaging device, and belongs to the technical field of proton beam monitoring. The target comprises a target body and an imaging device, the imaging device is arranged on one side of the target body, the target body is provided with a conical cavity, one end of the cavity is provided with an opening, the opening is close to the side where the imaging device is located, and the inner surface of the cavity is coated with a fluorescent material. The pre-target proton beam detection imaging device can monitor and image a heavy metal target bombarded by a high-energy proton beam in real time so as to know the operation condition of the target body in time. The receiving area of the target body can be increased by adopting the conical target body under the same beam diameter, the power density of the surface of the target body is reduced, the risk of damage to the target body is reduced, the service life of the target body is prolonged, and the target is reasonable in structural design, simple in principle and convenient to popularize and use.

The invention discloses a double-clad square chalcogenide fiber and a fiber grating preparation method based on the double-clad square chalcogenide fiber, and belongs to the technical field of intermediate infrared fiber devices. According to the double-cladding square chalcogenide optical fiber disclosed by the invention, the core layer is sequentially coated with the inner cladding and the outer cladding, the overall section shape is designed to be square, each side face of the square optical fiber is a plane, the core layer is sequentially coated with the inner cladding and the outer cladding, and the overall section shape is designed to be square, so that the double-cladding square chalcogenide optical fiber is obtained. Each side surface of the square optical fiber is a plane; based on the double-cladding square chalcogenide fiber, precise regulation and control of a laser focus in the fiber core can be realized, and the efficiency and quality of fiber grating inscribing are improved. Meanwhile, the plane structure on the other side of the optical fiber is utilized, real-time online monitoring can be carried out on the inscribing process, and the consistency and the performance stability of the grating are ensured; the invention has important application value in the technical fields of mid-infrared optical fiber sensing, nonlinear optics and laser.

The present invention belongs to the field of medical devices, and specifically discloses an LED package device with a uniform light cavity and a method for using the same. The device is composed of a uniform light cavity, a light emitting diode and an air pressure regulating device. The uniform light cavity is composed of a covering layer, a supporting member and a bottom layer; the covering layer and / or the bottom layer are plastic film parts. The air pressure regulating device is connected to the uniform light cavity. By evacuating or inflating, the pressure difference between the cavity and the atmospheric environment is changed, so that the plastic film part in a relaxed state is deformed to form an inwardly concave or outwardly convex air pressure type optical element. The concave surface and the convex surface are off-axis rotating paraboloids or quasi-conical surfaces. The covering layer is both a reflective surface of the uniform light cavity and a light output window. The light beam output by the light emitting diode array is reflected and diffusely reflected in the uniform light cavity and propagates along multiple paths. The output light spot forms an approximately uniform light intensity distribution on the skin, thereby reducing the probability of ultraviolet damage to DNA. The air pressure type hollow structure has a small dead weight, which improves user comfort.

The utility model discloses an instant heating type heating body assembly for drinking water equipment, which comprises a heating pipe, a water inlet end cover, a water outlet end cover and a heating electrode, the heating pipe is of a cylindrical structure, and the water inlet end cover and the water outlet end cover are respectively arranged at an inlet end and an outlet end of the heating pipe in a sealing fit mode. One end of the heating electrode is sleeved on the heating pipe, and the other end of the heating electrode is connected with an external power supply; a plurality of protruding parts are arranged on the inner wall of the heating pipe in the flowing direction, and every two adjacent protruding parts in the flowing direction are arranged in a staggered mode. According to the utility model, the lug bosses are arranged on the inner wall of the heating pipe, so that the direct effective contact area between the heating pipe and water is effectively increased, and the heating efficiency is improved; meanwhile, violent turbulent flow can be formed through the action of the protruding parts which are arranged in a staggered mode and water flow, so that generation of bubbles is effectively reduced, and the service life of the heating pipe is prolonged.

The invention discloses a high-power wave-stabilized semiconductor laser and a laser device. The semiconductor laser comprises a chip module, a wave stabilization module and a transmission device, the output end of the wave stabilization module is connected with the first end of the transmission device through an optical fiber, and the output end of the chip module is connected with the second end of the transmission device through an optical fiber; the wave stabilization module is used for generating a wave stabilization light beam, and the wave stabilization light beam is transmitted to the chip module through the first end and the second end of the transmission device; the chip module is used for receiving the wave-stabilized light beam and generating a wave-stabilized pump light beam, and the pump light beam is coupled to the second end of the transmission device and then is output by the third end of the transmission device. According to the technical scheme, the VBG is installed and adjusted in the wave stabilizing module, light generated by the wave stabilizing module is used as seed light, the chip module is excited to output high-power laser with the consistent wavelength, the power density of the surface of the VBG is small, the VBG is prevented from being burnt down, and the situation that cost is too high due to the fact that multiple VBGs are used is avoided.

The invention discloses a power amplifier and electronic equipment, and relates to the technical field of semiconductor devices, the power amplifier comprises a main transistor, an auxiliary transistor, a bias circuit, an input matching circuit and an output matching circuit; the gate end of the main transistor is connected with the input matching circuit, the drain end of the main transistor is connected with the output matching circuit, and the gate end and the drain end of the main transistor are respectively connected with corresponding bias circuits; the source end of the main transistor is connected with the drain end of the auxiliary transistor; the source end of the auxiliary transistor is grounded, and the grid end of the auxiliary transistor is set to enable the auxiliary transistor to be normally open; the voltage drop after the auxiliary transistor is turned on is not less than 50% of the voltage drop of the main transistor. An additional auxiliary transistor is cascaded to a main transistor to form a cascode-like structure, so that the adjustment of an impedance point is realized. The voltage of the main transistor is divided through the auxiliary transistor, so that the voltage leakage of the main transistor can be reduced, the power density is reduced, and the power matching difficulty of the device is reduced.

The invention belongs to but is not limited to the technical field of electrochemical containers, and particularly relates to a double-hybrid electrochemical capacitor and a preparation method thereof, the double-hybrid electrochemical capacitor comprises a hybrid positive electrode and a hybrid negative electrode, and the hybrid positive electrode and the hybrid negative electrode simultaneously comprise two energy storage mechanism active materials of double-electric-layer electrostatic energy storage and Faraday quasi-capacitance energy storage. An active material of the double-electrode-layer electrostatic energy storage mechanism is open-pore activated carbon, the port aperture of the open-pore activated carbon is smaller than or equal to 0.2 nm, and the pore web size is 1-1.5 nm. In the manufacturing process of the capacitor, the electrochemical principle is utilized, the positive electrode and the negative electrode are subjected to electrochemical hybridization design at the same time, on one hand, the upper limit of the working voltage of the electrochemical capacitor is increased to 4.4 V from 2.7 V through introduction of a Faraday quasi-capacitor energy storage mechanism active material at the positive electrode end, and therefore effective energy storage of the capacitor is greatly enhanced; the volume energy density is greatly improved; and on the other hand, high-power output characteristic matching of the system is simultaneously introduced and maintained at the positive electrode end and the negative electrode end through a double-electric-layer electrostatic energy storage mechanism active material.

The invention relates to the technical field of filters, particularly provides a common-mode interference suppression method for a non-isolated flexible interconnection system, a controller and a storage medium, and aims to solve the problem that the power density and the system stability of the non-isolated low-voltage flexible interconnection system cannot be considered in an existing method. For the purpose, the method provided by the invention comprises the steps of obtaining a resonant frequency range of common-mode interference generated by a system according to the capacitance of a capacitor and the inductance value of an inductor in a low-voltage flexible module, obtaining a parameter range of a common-mode inductor and a Y capacitor in the low-voltage flexible module, and constructing a target optimization function of the common-mode inductor and the Y capacitor; and obtaining an optimal solution of the target optimization function according to the target optimization function and the constraint condition thereof so as to realize common-mode interference suppression of the system. Therefore, not only can the power density of the system be reduced according to the target optimization function, but also the parameter optimal solutions of the common mode inductor and the Y capacitor in the electromagnetic interference filter can be determined, the common mode interference is effectively inhibited, and the stable operation of the system is ensured.

The invention relates to a heat exchanger and a water heating device having the same. A heat exchanger according to an embodiment of the present invention comprises: a heating member that includes a heating pattern of a predetermined shape and generates heat; and a main body part in which, when water flowing in through the inlet part flows to the outlet part along the flow path, heat exchange occurs due to heat generated by the heating member, thereby generating and discharging hot water, in which the heating pattern is divided into a plurality of sections formed to have different widths from each other.

The invention discloses a high-voltage asynchronous three-phase motor for a coal mining machine, and relates to the technical field of coal mining motors, the high-voltage asynchronous three-phase motor comprises a machine base, a front end cover and a rear end cover, a winding stator iron core is arranged in the machine base, the end part of the winding stator iron core is fixedly connected with the machine base, and a rotor is rotatably connected in the machine base through a rotating shaft; the bearing assembly comprises bearing chambers formed in the front end cover and the rear end cover, the two ends of the rotating shaft are rotationally connected with the bearing chambers through bearings, the bearing chambers are provided with isolator assemblies, the isolator assemblies comprise static rings fixedly connected with the bearing chambers, the rotating shaft is provided with driving rings, and oil seals are arranged between the static rings and the driving rings; the sealing effect is improved; the cooling assembly comprises a plurality of cooling water channels formed in the two sides of the machine base, the front end cover and the rear end cover are each provided with a circulating water channel and a bearing chamber water channel, and the circulating water channels communicate with the corresponding cooling water channels; the cooling and sealing effects can be effectively improved.

The invention discloses a nitride semiconductor laser with a light beam quality regulation and control layer, which sequentially comprises a substrate, a lower limiting layer, a lower waveguide layer, an active layer, an upper waveguide layer, an electron blocking layer and an upper limiting layer from bottom to top, and is characterized in that the lower limiting layer comprises a first lower limiting layer, a second lower limiting layer and a third lower limiting layer; the first lower limiting layer and the third lower limiting layer are any one or any combination of AlGaN, GaN, AlInGaN and AlInN, and the second lower limiting layer is any one or any combination of InGaN, AlInGaN and AlInN; a first light beam quality regulation and control layer is arranged between the first lower limiting layer and the second lower limiting layer, a second light beam quality regulation and control layer is arranged between the second lower limiting layer and the third lower limiting layer, and the first light beam quality regulation and control layer and the second light beam quality regulation and control layer form a light beam quality regulation and control layer. Substrate mode leakage and stray light can be inhibited, the light spot divergence angle is improved, the high-order transverse mode generation probability is reduced, and the light beam quality factor and light beam convergence are improved.

This application relates to the field of optical device technology, and discloses a Faraday rotator, its fabrication method, and an isolator. The Faraday rotator comprises multiple magneto-optical crystals and multiple heat-dissipating crystals, which are alternately stacked along the optical path. Embodiments of this application can overcome the thermal focus shift defect of the isolator without increasing the output beam diameter of the collimator.

The present invention proposes a fault-tolerant control system for a spacecraft power converter, which is suitable for a high-voltage, high-power, and high-reliability spacecraft power system, and includes: a three-level control unit, a fault mode flying capacitor voltage control unit, a two-level control unit, a fault-tolerant control unit, and a mode switching switch to drive a unit: the present invention designs three-level and two-level working modes according to the topological characteristics of a multi-level flying capacitor; under normal circumstances, the power converter operates in a three-level mode, which can reduce the voltage stress of the power device and the loss of the power supply, and realize high-voltage and high-efficiency operation of the converter; after a short-circuit fault occurs in the power device, the power converter operates in a two-level mode, and can still provide electrical energy to the load, thereby ensuring the reliability of the power converter.

The present invention provides an automated EMC filter design method, comprising the following steps: building a power device database to store the switch characteristic parameters of the power device; building a system model library to store the system model to be analyzed of the EMC filter; building a filter component model library to store the filter parameters of the EMC filter; calculating the spectrum results of the analog filter based on the switch characteristic parameters, the system model to be analyzed, and the filter parameters; comparing the spectrum results of the analog filter with an EMC standard library, and determining the parameter design of the EMC filter when the spectrum results meet the design standards of the EMC standard library. After adopting the above technical solution, it is helpful to avoid over-design of the filter structure, and at the same time, it can greatly accelerate the efficiency of research and development and save manpower and testing resources.

A single-chip integrated half-bridge relates to the technical field of semiconductors. Comprising a second cathode, an epitaxial wafer and an isolation layer which are sequentially arranged from bottom to top; and a first heavily doped P region, a first heavily doped N region, a second heavily doped P region and a second anode are arranged in the epitaxial wafer. According to the half-bridge rectification chip, the two diodes which are reversely connected in parallel are integrated on one chip, the diode from the first anode to the first cathode area conducts electricity horizontally, the diode from the second anode to the second cathode area conducts electricity vertically, the area of the chip is effectively utilized, only one chip needs to be packaged in the half-bridge rectification chip in the scheme, and the cost is reduced. The packaging process steps and cost are reduced, the use amount of the half-bridge rectification chip in the scheme can be reduced by half, and the power density is two times that of a traditional half-bridge device.

The utility model provides a clothes processing device, and relates to the technical field of clothes cleaning. The clothes processing device can comprise the inner cylinder, the outer cylinder, the heating device and the electrolyzing device, the avoiding groove is formed in the outer cylinder, the heating device and the electrolyzing device are located on the front side and the rear side of the avoiding groove respectively, the electrolyzing device and the heating device are separated from each other, and therefore the size of an electrode of the electrolyzing device cannot be limited by the heating device, and the service life of the electrolyzing device is prolonged. The size of the electrode of the electrolysis device can be enlarged, so that the area of the electrolysis device is increased, the power density is reduced, and the problem of short service life or poor performance can be solved. And the possibility of contact between the electrolysis device and the heating device caused by installation errors or screw looseness is reduced, so that the risk of short circuit of the motor is reduced. Calcium and magnesium ions which are accumulated on the surface of the cathode of the electrolysis device and form precipitates due to long-time electrolysis are reduced, and reduction of electrode performance is slowed down.

The utility model discloses a skirting line type heater, which belongs to the technical field of heaters, and comprises a shell and a power supply access port, the shell is provided with an air inlet and an air outlet, the air inlet is positioned at the lower part of the shell, the air outlet is positioned at the upper part of the front side of the shell, an inclined guide plate is arranged in the air outlet, a heating pipe is arranged at the bottom of the shell, and the heating pipe is connected with the power supply access port. A plurality of cooling fins are evenly arranged on the heating pipe, the two ends of the heating pipe are fixed through end fixing pieces with buffer sleeves, and the middle of the heating pipe is fixed through middle fixing pieces with buffer sleeves. Through the flow guide plate of the air outlet, hot air is obliquely and transversely discharged from the air outlet in the variable direction, the heating pipe is fixed through the middle fixing piece with the buffer sleeve, the two ends of the heating pipe are fixed through the end fixing piece with the buffer sleeves, and when the heating pipe expands with heat and contracts with cold, due to the fact that the buffer sleeves can freely move, noise is lowered; the power density of the heating pipes is reduced through the at least two heating pipes, the service life is long, the heat efficiency is high, the temperature of the air outlet is low, and scalding caused by local overheat is avoided.

This invention provides a method and system for dynamic failure analysis and location of chips. The method includes the following steps: sending a test signal to a testing device; the test signal is used to control the testing device to perform a regional excitation operation; the regional excitation operation includes: sending a preset number of excitation signals to the chip under test (DUT) within each time window according to the sending order of the excitation signals; wherein, one excitation signal is used to activate a corresponding functional unit in the DUT, and functional units that do not receive an excitation signal are inactive; the preset number is less than the total number of functional units in the DUT; acquiring the state data corresponding to the activated functional unit; and forming a failure location result based on the state data. This invention reduces the instantaneous power consumption density of the DUT by regionalizing the signal, solving the problems of high cost and complex implementation of existing dynamic failure analysis and location methods for chips.

This application discloses an electric drive device and a vehicle. The electric drive device includes a housing, and a motor assembly, a transmission assembly, and an output assembly housed within the housing's internal space. The transmission assembly includes a planetary gear assembly and a drive shaft. The output shaft of the motor assembly, the planetary gear assembly, and the drive shaft are sequentially meshed on a first rotation axis. The output assembly is disposed along a second rotation axis and meshes with the drive shaft. The first and second rotation axes are parallel but not coincident. Thus, the drive shaft and the planetary gear assembly are connected in the direction of the first rotation axis and rotate on the first rotation axis via the output shaft. The output assembly meshes with the outer circumference of the drive shaft, causing the output assembly to rotate about a second rotation axis parallel to the first rotation axis. This reduces the torque of the output shaft, increases the transmission ratio of the electric drive device, and reduces the space occupied by the electric drive device, thereby enabling the electric drive device to achieve lower power density and smaller size.

The utility model relates to the field of permanent magnet generators, in particular to a rotor punching sheet capable of directly outputting available alternating current and a permanent magnet generator, and the rotor punching sheet is circumferentially provided with a plurality of slot units; each slot unit comprises two slots, and a V shape is formed between the two slots, that is, the two slots are close to each other at the inner end close to the center of the punching sheet and are unfolded to each other at the outer end close to the edge of the punching sheet; in each slot unit, a gap is formed between the inner ends of the two slots; in each slot unit, the number of the distance S between the outer ends of two slots is influenced by the diameter of a rotor punching sheet, the number of embedded permanent magnets and the like. In each slot unit, the V-shaped included angle between two slots meets the relation and is influenced by the number of the embedded permanent magnets and the like. The beneficial effects of the utility model are that not only can the strength be ensured, the weight be reduced, but also the efficiency can be improved, the waveform can be optimized, and the voltage regulation rate can be reduced, that is, high-quality electricity which can be directly used can be generated, so that a power generation system becomes simple, and the concealment of military engineering vehicles can be improved.

The application discloses an LLC resonant converter, a power supply circuit and a method for generating an output voltage. The LLC resonant converter comprises a full-bridge switching circuit, a transformer, a resonant circuit and a bridge rectifier. The full-bridge switching circuit comprises a first transistor, a second transistor, a third transistor and a fourth transistor, the first ends of the first transistor and the third transistor are connected to a direct current input voltage, and the second ends of the first transistor and the third transistor are respectively connected to the first ends of the second transistor and the fourth transistor. The two ends of a secondary winding of the transformer are respectively connected to the second ends of the fourth transistor and the second transistor. The resonant circuit is connected between a first switching node formed by the first transistor and the second transistor and a second switching node formed by the third transistor and the fourth transistor. The bridge rectifier is connected between the two ends of the secondary winding to generate a rectified output signal, and the rectified output signal is filtered to generate an output voltage. The application improves the efficiency of the LLC resonant converter.