69results about How to "Achieve high power output" patented technology

The invention discloses an electric car modularization power system based on parallel connection of batteries and a control method. The electric car modularization power system comprises a battery system and a motor control system, wherein the battery system comprises a power supply battery pack and a battery management system, the motor control system comprises an inverter and an inverting control module, the battery management system is used for managing, sampling and controlling the power supply battery pack, the power supply battery pack is connected to the inverter through a conducting wire, the inverter is used for inverting direct currents into three-phase electric power with adjustable voltage and frequency, which is supplied to a traction motor, and the inverting control module is used for controlling the inverter and is in communication with the battery management system through a bus; power supply batteries are connected in parallel, the power supply battery pack is divided into n groups, the n groups of batteries are respectively used for supplying power to the traction motor by adopting inverter circuits, and the motor control system is combined with the battery management system, and thus the standardization and the modularization of the power system are facilitated, and the management and the replacement of the batteries are convenient.

The invention provides a resonance control circuit and an electromagnetic heating device. The resonance control circuit comprises a power source module, a voltage sampling circuit, a first resonance circuit, a second resonance circuit, a control circuit and a controller. The voltage sampling circuit is used for sampling voltage in the power source module so that the sampled voltage can be obtained; the control circuit is used for controlling the first resonance circuit or the second resonance circuit to be connected with the power source module so that resonance of the first resonance circuit or the second resonance circuit can be achieved; the controller is respectively connected with an output end of the voltage sampling circuit and an input end of the control circuit and used for sending a control signal to the control circuit according to the relationship between the sampled voltage and the preset voltage value. According to the technical scheme, resonance of a circuit is achieved through the different resonance circuits, and therefore it is guaranteed that the electromagnetic heating device can achieve high-power output at high voltage and low voltage.

The invention provides a dual-electron-beam terahertz wave radiation source. The terahertz wave radiation source adopts an overmode cascading folded waveguide traveling-wave amplified high frequency structure, so that the length of a single-section folded waveguide slow-wave structure can be dramatically shortened, and the demand on the magnetic field is reduced. The terahertz wave radiation source adopts the dual-electron beam excitation mode, so that the output power can be improved, and the demand on the negative electrode current emitting density is reduced as well; the input signal adopts a higher mode TE20 mode, so that the dimension of the slow-wave structure can be enlarged, and the processing of the slow-wave structure can be performed conveniently; within the same terahertz wave radiation source, the high power terahertz wave output is realized, and the design and the processing of the terahertz wave radiation source are facilitated; and therefore, the applications of the terahertz wave radiation source in the anti-interference, harmful substance detection, ultra wide band radar long-distance detection and high-resolution imaging radar and the like are promoted.

The invention relates to a low wind speed high power magnetic suspension vertical shaft wind turbine and a control method thereof, belonging to the field of wind power. The wind turbine comprises a permanent magnet direct-drive wind turbine, a magnetic suspension disc motor, a wind wheel, an air gap sensor, an upper end bearing, a lower end bearing, a shell, a tower, a converter system, a contactor and energy storage equipment and the like. The converter system includes machine-side converter, grid-side converter and suspension converter. When the wind speed is less than the rated wind speed,the suspension converter performs suspension control to make the rotor of the wind turbine set rise to and maintain the suspension balance point. The machine-side converter performs MPPT control on the permanent magnet direct drive generator, and the grid-side converter realizes grid connection. When the wind speed is higher than the rated wind speed and lower than the cut-out wind speed, the suspension converter implements rotational damping control, and the machine-side converter implements constant power control for the permanent magnet direct drive generator. The invention has ingenious structure, simple and convenient control and high wind energy utilization rate, can realize low wind speed starting and high power output, and is especially suitable for weak wind type wind farms.

The invention relates to an ammunition link small-diameter artillery ammunition feeding and recoil and counter-recoil analog device, which consists of an ammunition feeding analog mechanism and a recoil and counter-recoil analog mechanism under the ammunition feeding analog mechanism, wherein the ammunition feeding analog mechanism mainly includes an ammunition feeding guide, a pair of ammunition link brackets, a pair of feed sprockets and a first hydraulic motor driving the pair of feed sprockets; and the recoil and counter-recoil analog mechanism mainly includes a bearing frame body, a curved groove cam mounted on the bearing frame body and a second hydraulic motor driving the curved groove cam. The device achieves the analog of ammunition feeding, link removal, link disposal, ammunition disposal and recoil and counter-recoil functions of the small-diameter artillery, adopts the hydraulic motor as the power source, further realizes the high-power output during the work of the device, and not only meets the requirements for the experiments in the ammunition feeding system laboratory, but also saves the experiment cost as the ammunition feeding speed and the frequency and displacement of recoil and counter-recoil are adjustable.

The invention relates to a floating platform capable of suspending in water, a device of generating electricity by means of wave energy of water. Simply, the device is composed of large and small floating tables with different functions and divisions of work. The combination can be diversified, and in particular, the most typical structure of an integral functional unit is formed by four secondaryfloating tables which are arranged symmetrically on a primary floating table in a cross manner. Compared with wind power generation, the device without a firm foundation is conveniently built, and isexcellent in windproof and wave-resisting performances as the device is attached to the water surface. Compared with solar power generation, the layout of the device does not occupy limited land area, and is also not limited by lighting conditions in cloudy days at night. Furthermore, the floating platform formed on the water surface combines the expanded land area and wind energy or solar energy, so that the device is a possible vision. In a word, the floating wave power generation device not only is suitable for islands or drilling platforms far from the main land, but also has a glorious prospect if being applied to peri-urban areas rich in coastal tide or wave resource and exuberant in demand on energy source on a large scale.

The invention provides a high power DC-DC converter based on aviation dual-active bridge circuits and a health management method thereof. The converter is used for changing an input voltage of onboardrated input 270VDC into a 28VDC rated output voltage. Onboard equipment provides a power supply. A system is realized based on the active bridge circuits and has the advantages of high efficiency, concise control mode and light weight. A four-module parallel working mode is employed. The supported maximum output power is 12kW. Through modular design, high power output is easy to realize. A powersupply system of any power level can be formed. Flexibility of the power supply system is improved. Product serialization, platformization and standardization are easy to realize. A health managementtechnology is integrated into the converter, through analysis and processing of various state parameters which are collected in real time when the converter operates, a health state of the system is evaluated, residual life of an internal power switch tube which is easy to lose efficacy is predicted, a maintenance suggestion is provided, and health management service is put forward, so working reliability of the whole system is improved and maintenance cost is reduced.

The invention discloses a fault ride-through system and ride-through method of a vessel direct-current networking electric propulsion system, and solves the problems that the oil consumption is high and the use rate of fuel is low caused by the condition that when a vessel propulsion system is under a low-power running state, a diesel generating set and a spare diesel generating on the vessel still need to keep a joint working state. The fault ride-through system comprise a first diesel generating set (1), wherein the first diesel generating set (1) is connected with a public direct-current bus (5) through a first rectification frequency converter (2); a main propulsion motor inversion frequency converter (6) and a side propulsion motor inversion frequency converter (9) are separately connected to the public direct-current bus (5); a chopper (15) is connected to the public direct-current bus (5); and a super capacitor set (16) is connected to the input end of the chopper (15). According to the fault ride-through system disclosed by the invention, under an underload running condition of the vessel, fault ride-through of the diesel generating set can be realized by super capacitors.

A wind electricity generator with dwindled then widened spout comprises tower base, blower fixed on the top of the base and a dynamo drove by the blower. The blower is coaxially fixed to the spout in the dwindled part. The inlet area A1 of the spout is relative large, and along the wind direction, the area of laryngeal part A2 is the smallest, after the laryngeal, the area is enlarged to outlet area A3. With dwindled design, the wind speed is accelerated, so maximizing the utility of wind, decrease the blower's size and lowing down the cost.

It is a semi-conductor laser side pump solid ribbon laser, which is characterized by the following: the laser activation medium is laser solid ribbon of cuboid thin slice; the output pump light from semi-conductor laser pump is shaped into an one-dimensional parallel light of quadrate section; the light beam diameter of the pump light along thickness direction is less than half of the laser solid ribbon thickness; the pump light goes into the laser solid ribbon from the side of the solid ribbon; the laser solid ribbon dissipate heat from upper and down surfaces.

The invention discloses a floating table type wave power generation device achieving netting large-scale application. The floating table type wave power generation device is characterized in that based on combination of floating platforms capable of suspending in water when being in the stable state and the moving state, the difference between different influences of different powers of flowing and floating of waves to the floating platforms is utilized, interaction is generated, the lever principle is adopted, the motion is converted into mechanical vibration, and a driving mechanism acts togenerate power. According to the power generation device, two forms are taken as labor division of the lowest starting point, based on this, combination of lowest quadrangle netting is achieved, meanwhile, the power generation device is provided with multiple automatic adjusting mechanisms, comprehensive utilization of wave energy is emphasized, all-weather all-ocean natural environmental suitability is emphasized, particularly, the group large-scale application is emphasized, and the brand-new ocean wave energy development scheme is achieved.

The invention discloses a semiconductor laser for a solid-state laser pumping source. The semiconductor laser comprises a base, a plurality of Z-shaped illuminant components arranged on the base, wherein the plurality of illuminant components are connected in series, and the adjacent illuminant components are symmetrically arranged on the base; the illuminant component comprises a heat sink on which a circuit board is installed; one end of the heat sink is installed with a first electrode electrically connected with the circuit board, and the other end is installed with a second electrode electrically connected with the circuit board; a bar module is arranged between the first electrode and the second electrode in the middle part of an upper end surface of the heat sink, the bar module is formed by a plurality of bar components in series connection; and two ends of the bar module are electrically connected with the first electrode and the second electrode through conductive blocks. The semiconductor laser has the features of being compact in structure, small in volume, large in power, good in radiating effect and long in service life.

The invention relates to a vertical axis suspension permanent magnet wind generator and a control method of the vertical axis suspension permanent magnet wind generator and belongs to the field of wind power. The wind generator comprises a rotor, a stator, a shell, a tower cylinder, a base, a damping brake system, a suspension system, a wind collection drive system and a control system. The stator comprises a stator core and a three-phase winding. The periphery of the tower cylinder is sleeved with the stator, and the stator and the tower cylinder are fixed. The rotor comprises a rotor core and a permanent magnet, and the outer side of the stator is sleeved with the rotor. The suspension system is an electromagnet and permanent magnet mixed suspension system. The wind collection drive system comprises transverse supports, longitudinal supports, blades and sleeves. The transverse supports and the longitudinal supports are fixed to the rotor and the shell. The control system obtains the suspension current given value according to the difference of the air gap length set value and the air gap real-time measurement value to control the suspension air gap, and the stable power generation of an engine is guaranteed. The vertical axis suspension permanent magnet wind generator is ingenious in structure, easy to control, easy and convenient to mount and maintain, high in wind energy utilization rate and capable of achieving the low-wind-speed start and large-power output.

The invention discloses a flat plate windmill, which comprises a bedplate component, a wind direction tracking component, a mechanical energy output component, a wind energy receiving component and a quick and slow gear case. The wind energy receiving component is made of six rectangular flat plates. The mechanical energy output component consists of two mechanical energy transmission chains. The wind direction tracking component consists of a wind direction sleeve, a wind direction frame, a wind direction plate and a split wind direction plate. The output gear of the quick and slow gear case drives the gear of the wind power plate through a chain to regulate the face direction of the wind power plate automatically. The six gear clusters and one chain of the quick and slow gear case constitute two gear trains to produce high and low speed drive. The input gear cluster (A) changes one-way drive into alternate drive of two ways. The mixed gear cluster (C) changes the alternate drive of two ways at different speeds into one-way quick and slow drive. The invention has a novel design and sound practicality.

A wind electricity generator with dwindled spout comprises tower base, blower fixed on the top of the base and a dynamo drove by the blower. The blower is coaxially fixed to the spout in the dwindled part. The inlet area A1 of the spout is relative large, the outlet area A2 is small, the sectional area decreases along the wind flow direction. With dwindled design, the wind speed is accelerated, so maximizing the utility of wind, decrease the blower's size and lowing down the cost.

The invention discloses a low-wind-speed dual-motor magnetic levitation vertical axis wind turbine generator and a control method thereof, and belongs to the field of wind power. The wind turbine generator comprises a permanent magnet direct driving type wind driven generator, a magnetic levitation disc type motor, a wind wheel, a propeller torque adjustment motor, a shell, a tower frame, a propeller torque current transformer and the like; the current transformer comprises a machine side current transformer, a net side current transformer, a levitation current transformer, a disc type motor rotor side current transformer and a propeller torque current transformer. When the wind speed is smaller than the rated wind speed, the levitation current transformer implements levitation control, arotating body of the wind turbine generator ascends to and is kept at the levitation balance point, the machine side current transformer implements MPPT control over the permanent magnet direct driving type wind driven generator, and the net side p current transformer achieves gridding. When the wind speed is larger than the rated wind speed and smaller than the cut-out wind speed, the levitationcurrent transformer implements rotary damping control, the propeller torque current transformer implements propeller torque control, and the machine side current transformer implements constant powercontrol. The wind turbine generator is ingenious in structure, easy and convenient to control, high in wind energy use rate, capable of achieving low-wind-speed starting and high-power output and is particularly suitable for a weak wind power plant

A high-power fiber laser phased array high-speed information transmitting device capable of being dynamically connected is applied to the field of super-remote-distance space communication. To achieve high-speed laser high-power emission and super-remote-distance transmission, a seed source undergoes beam split through a coupler, a beam of light is input into phase controllers as reference light, and the other beam of light undergoes high-speed information modulation; a radio-frequency signal generator and the other beam of light enter an intensity modulator to obtain a high-speed modulation signal, the high-speed modulation signal enters the four phase controllers respectively to carry out phase control after undergoing uniform light split through the coupler, four beams of high-speed modulated light are obtained, and the four beams of high-speed modulated light enter four optical fiber amplifiers respectively to be amplified at a high power and then undergo coherent beam combination through a beam combiner; a beam splitter outputs 1% of a combined laser into the phase controllers, the combined laser undergoes phase comparison with the reference light, the comparison result is processed by the phase controllers to send out phase control signals, and four phase modulators control the phases of the beams of light respectively after receiving the phase control signals to guarantee coherent beam combination and emission angle scanning.

The invention aims at providing a vertical laminated busbar-based converter module which is compact in structure, reasonable in arrangement, high in safety and reliability, convenient to maintain and good in electrical property. According to the vertical laminated busbar-based converter module, a three-phase half-bridge DC busbar comprises symmetrically superimposed positive busbar and negative busbar; an insulating layer is arranged between the positive busbar and the negative busbar; an input positive electrode of the positive busbar and an input negative electrode of the negative busbar are correspondingly connected with a positive electrode and a negative electrode of an IGBT power device; the positive electrode and the negative electrode of the IGBT power device are symmetrically arranged at two sides of the three-phase half-bridge DC busbar; capacitance windows which are equal to peak absorption capacitors in number are arranged in the lower side edge of the three-phase half-bridge DC busbar; the peak absorption capacitors are located at the capacitance windows and the positive electrodes and the negative electrodes of the peak absorption capacitors are correspondingly connected with the positive electrode and the negative electrode of the IGBT power device respectively; and a DC support capacitor is connected to the three-phase half-bridge DC busbar. The vertical laminated busbar-based converter module can be applied to the field of power equipment.

The invention discloses a display screen structure realized by optical fibers, which relates to a display screen realized by the optical fibers and is applied in the field of high-luminance color display to solve the problems of high cost, low resolution and low luminance of the conventional high-quality display screen. An optical signal of a signal laser source of the display screen structure is input from one end of a first multimode fiber; each circulator is connected with a single mode fiber, the multimode fiber and a fiber Bragg grating to form a pixel point; N pixel points are connected end to end to form a linear structure; each pixel point outputs the optical signal with a wavelength; N is the number of the pixel points of the display screen, and is any integer in the range of 100 to 300,000,000; the N pixel points are arranged into a 10-30,000*10-10,000 array; the signal laser source is a laser which outputs N wavelengths; and the N wavelengths output by the signal laser source correspond to central wavelengths of the first to the Nth fiber Bragg gratings one to one.

The invention discloses a vehicle-mounted inversion device for different input voltages. The device comprises at least two conversion module groups and a connecting way switching module. The input terminals of the conversion module groups are connected with the connecting way switching module. Series connection or parallel connection of the input terminals of the conversion modules is realized based on switching of the connecting way switching module; and output terminals of the conversion module groups are connected in parallel. According to the invention, the device can be applied to a power grid with different input voltages. Switching becomes flexible; the switch loss is low; and the electric energy conversion efficiency is high.

The invention provides a direct coupling microwave liquid-phase plasma alcohol hydrogen production device and method. The device comprises a microwave generator, a rectangular waveguide tube, a liquid-phase discharge electrode, a reactor, a feed tube, an exhaust tube, a gas collecting tube, a raw material tank, a composite vacuum gauge and a metal sleeve. The reactor is made of a quartz material or a ceramic material or a mixture of the quartz material and the ceramic material. The upper portion of the reactor is connected with the composite vacuum gauge, the feed tube and the exhaust tube. The other end of the feed tube and the other end of the exhaust tube are connected to the raw material tank. The lower portion of the reactor vertically penetrates through the rectangular waveguide tube and is nested in the metal sleeve, and the metal sleeve is welded to the lower portion of the rectangular waveguide tube. The liquid-phase discharge electrode is arranged in the metal sleeve. One end of the rectangular waveguide tube is connected to the microwave generator. The top of the raw material tank is connected with the gas collecting tube. By the adoption of the device and method, working efficiency of liquid-phase microwave plasma alcohol hydrogen production is improved.

The invention discloses a shipping direct-current networking electric propulsion system with a pulse load assembly and an adjusting and controlling method. The problem that efficiency of diesel power generating sets is low due to the fact that the shipping diesel power generating set design volume is rather large is solved. The shipping direct-current networking electric propulsion system comprises a first diesel power generating set (1) and a second diesel power generating set (3), the first diesel power generating set (1) is connected with a common direct-current bus (5) through a first rectification frequency converter (2), and the second diesel power generating set (3) is connected with the common direct-current bus through a second rectification frequency converter (4). A main propulsion motor inversion converter (6) and a side propulsion motor inversion converter (9) are connected to the common direct-current bus, a shipping pulse load inversion converter (17) is connected to the common direct-current bus, the output end of the shipping pulse load inversion converter is connected with the shipping pulse load assembly (18) through a shipping pulse load transformer (13), and a wave chopper (15) and a super capacitor bank (16) are connected to the common direct-current bus. The oil consumption quantities of the power generating sets are reduced, and efficiency of the power generating sets is improved.

The invention relates to a planar multi-electron-beam excitation graphene sub-wavelength grating-integrated terahertz radiation source and application of the terahertz radiation source. The terahertzradiation source comprises a shell, an electron gun cathode, a grating structure, partition plates, and an output port; the shell is used for protecting the terahertz radiation source; the electron gun cathode is arranged on one side of the opening of the shell and is used for emitting multiple electron beams; the grating structure is arranged in the shell; a graphene layer is arranged on the surface of the grating structure; and the surface plasmon polaritons of the graphene layer interact with the multiple electron beams, so that terahertz radiation can be generated; the partition plates arearranged between every two adjacent electron beams and are used for isolating the electron beams; and the output port is arranged on the shell and is used for outputting the terahertz radiation. According to the terahertz radiation source of the invention, the coupling effect of the electron beams and an integrated high-frequency system is fundamentally enhanced; beam-wave interaction efficiencyis improved; the problems of the low interaction efficiency and low output power which confront the development of a vacuum electronic device towards a terahertz wave band are solved; the output powerof the terahertz radiation source can be greatly improved; and the processing of engineering tubing and the realization of a high-power terahertz source are facilitated.

The invention discloses a vehicle-mounted bidirectional charger circuit of an electric automobile. The vehicle-mounted bidirectional charger circuit of the electric automobile comprises a rectifier module, a DC / DC conversion module, and a control circuit, the rectifier module is connected with the DC / DC conversion module through a direct current bus, the working modes of the vehicle-mounted bidirectional charger circuit comprise a forward direction battery charging mode and a reverse direction alternating current output mode; under the forward direction battery charging mode, the rectifier module works as a full-bridge PWM rectifier circuit, and the DC / DC conversion module works as a full-bridge LLC rectifier circuit; under the reverse direction alternating output mode, the DC / DC conversion module works as a full-bridge LC rectifier circuit, and the rectifier module works as a full-bridge inverter circuit. According to the vehicle-mounted bidirectional charger circuit of the electric automobile, the vehicle-mounted bidirectional charger is low in cost and high in power density, and high power output with a small volume can be realized.

The invention relates to a flashlight which includes a lamp holder, a barrel body, a lamp tail and a switch are arranged on the lamp holder, the barrel body or the lamp tail, wherein the conducting two ends of the barrel body are corresponding to single barrel body connected with the lamp holder and the lamp tail; a light source, a first control circuit board electrically connected with the lightsource and controlling light output of the light source are arranged inside the lamp holder; a second control circuit board electrically connected with the switch is arranged inside the lamp tail; a first diode and a second diode that are mutually electrically conducted, a first capacitor, a field-effect tube and a first MCU unit are arranged on the second control circuit board; a battery is further arranged inside the barrel body; the first control circuit board and the second control circuit board are correspondingly connected with two poles of the battery, and are electrically connected through the barrel body. According to the invention, the operation signal of the switch is converted into a modulating signal, then the modulated control information data is superposed on a primary current, then single barrel body transmission is adopted, so that the light source can be driven by a large current, large power output and wide operating voltage are realized, and high frequency flicker of the light source cannot be caused.

A hydraulic winch is composed of two parts: a winch power device and a rope storage device. connected by wire rope. The internal structure of the two friction drum assemblies is the same, and the planetary reducer and hydraulic brake are placed inside the friction drum, and the planetary reducer is connected with the gear shift cylinder, so as to realize the work of retracting and releasing the rope under load and no load. The rope storage drum used to store the steel wire rope is a coiled rope storage device. The winch has the advantages of simple structure, light weight, low cost and convenient arrangement in the vehicle, etc., and can be used for self-rescue, mutual rescue or pulling heavy objects on the motor vehicle along with the vehicle.

The invention discloses a tunable short-pulse laser amplifier based on mode-locking autocorrelation. Pumping is performed based on a specific gain switching characteristic of a laser operation material by utilizing a Q-switched quasi-continuous laser beam; based on a self-focusing nonlinear characteristic of an operation material of a kerr medium, self mode-locking oscillation is realized; a tunable property and dispersion compensation of optical wavelengths are realized by a first prism and a double-refraction interference filter; the pulse width of a light beam of specific wavelength of a tuning laser is expanded through a pulse width expander; the light beam, expanded by the pulse width expander, is subjected to proper linewidth expansion through a phase modulator; the laser beam, expanded by the phase modulator, is subjected to power amplification through an external regenerative amplifier; the laser beam with amplified power is subjected to pulse width compression through a pulse compressor; and after the light beam is oscillated in a hollow cavity self-mode-locking system, the light beam emits from a sixth concave spherical mirror. By adoption of the tunable short-pulse laser amplifier, the problems of not high single-stage power amplifying times and impossibility of realizing tuning of laser wavelengths are solved.

The invention disclose a tilted fiber grating display screen realized by using an optical fiber, and relates to a display screen which is realized by using the optical fiber. The display screen is applied in the field of high-brightness, colored and high-resolution display and solves the problems of high cost, low resolution and low brightness in a conventional high-quality display screen. Optical signals of a signal laser source of a display screen structure are input from one end of a multimode optical fiber; each tilted fiber grating reflects an optical signal with a corresponding wavelength to the side surface of the optical fiber for outputting; N tilted fiber gratings reflect N optical signals with the corresponding wavelength, so that a display screen function of N pixel points is realized, wherein N is the number of the pixel points on the display screen and is an integer from 100 to 300,000,000; and the pixel points are arranged in an array of 10-30,000*10-10,000. A used laser is the laser which outputs N wavelengths; and the N wavelengths output by the laser correspond to the centre wavelength of the first to Nth tilted optical fibers one by one.

An air source power system can be in a full-closed circulation mode, semi-closed circulation mode or a progressive increase mode and comprises a high-pressure fan, first to N-th air engine operating sets, a booster fan, an AC generator, a power output shaft and the like. The air source power system has the advantages that physical characteristics of air flow are made comprehensive use, both low-power input and high-power output are achieved, and dependence on traditional energy sources can be gotten rid of.

The invention belongs to the technical field of power electronics, and relates to a high-precision large-power dc voltage output control method. The high-precision large-power dc voltage output control method comprises step A: a reference unit takes a sample of dc voltage, the dc voltage serves as reference dc voltage of each power unit and is sent to a comparison module; step B: a feedback module acquires working dc voltage of each power unit and sends the working dc voltage to the comparison module; step C: the working dc voltage of a plurality of power units is compared with the reference dc voltage of the plurality of power units in the comparison module, and the error value of the working dc voltage of the power units can be obtained; and step D: the comparison module controls the change of output energy in order to make the dc voltage of the power units tend to the reference dc voltage. With respect to the high-precision large-power dc voltage output control method, the input voltage is dynamically adjusted according to different output voltage, the adjusting precision of the power supply can be improved, and large-power output can be achieved.