33results about How to "Increase conversion power" patented technology

A power factor correction controller simultaneously controls several power converters to be operated at a critical conduction mode to improve the overall conversion efficiency and conversion power of the power factor corrector. The controller includes a primary power converter control circuit for feeding back an input voltage signal, an output voltage signal and a primary current signal, and outputting a primary gate control signal for controlling a primary power switch; at least one secondary power converter control circuit for receiving the primary gate control signal and outputting a secondary gate control signal for controlling a secondary power switch; and a phase splitter circuit for receiving the primary gate control signal to control a gate output driving circuit, so that the gate output driving circuit outputs the secondary gate control signal.

The invention discloses a yacht and a power supply system thereof. The power supply system integrates solar energy, wind energy, tidal and ocean wave energy and thermoelectric generation, therefore, the offshore resources are utilized to the maximum extent, power for driving the yacht to run is greatly increased, and the yacht provided by the invention can sail at intermediate and remote distances and is suitable for sailing under various weather conditions.

The invention relates to an adaptive active piezoelectric energy acquisition device, which consists of a main circuit and a control unit thereof. A switching tube is connected in parallel with each diode of a full-bridge rectification unit. A direct current unit is a Buck circuit, and a switching tube of the Buck circuit is connected to the positive pole end of a charging capacitor. A current acquirer is arranged on the alternating current side of the full-bridge rectification unit. A power acquirer is arranged at the output end of the Buck circuit. An acceleration sensor for acquiring the frequency of external exciting force is also arranged in the main circuit. In order to adaptively obtain optimal control voltage, a power acquisition unit of a singlechip acquires an output power value in real time, and the optimal control voltage is adaptively regulated, so that the device works in a resonant state to maximally obtain mechanical energy, a damping period is shortened, the conversion power of the mechanical energy is improved, and impedance matching in realized in an electric energy transmission process to realize electric energy power output. When a system vibrates at frequency greatly deviated from fixed frequency, the energy acquisition power of the system cannot be greatly reduced.

The present invention relates to a transformer structure comprising a cover, a bobbin, a channel, a primary winding coil, a plurality of secondary winding coils and a magnetic core assembly, wherein the cover is provided with a plurality of conductive connecting pins; the bobbin connected with the cover includes a body, a first winding coil area and a plurality of single groove second winding coil areas, and the plurality of single groove second winding coil areas are arranged in the two sides of the first winding coil area; the channel is penetrated through the body; the primary winding coilis winded around the first winding coil area of the bobbin, and is connected with the plurality of conductive connecting pins of the cover; the plurality of secondary winding coils are respectively winded around the plurality of single groove second winding coil areas of the bobbin; and part of the magnetic core assembly is arranged in the channel of the bobbin. By means of arranging a plurality of single groove second winding coil areas on the bobbin, the transformer structure can improve the current switching power and increase the winding coil space of the first winding coil area, and can reduce the heat energy generated during the operation of the transformer.

An exhaust gas system for an internal combustion engine, comprising a first exhaust emission control device close to the engine and a second exhaust emission control device remote from the engine. The second exhaust emission control device is heatable by a combination of an upstream burner and an electric heating device. For heating the exhaust emission control devices after an engine start, the internal combustion engine is operated with at least one engine-internal measure for raising the exhaust gas temperature, and the burner and the electric heating device are activated at the same time or offset in time for heating the second exhaust emission control device. A mixed gas entering the second exhaust emission control device is set to a stoichiometric lambda value. The invention allows accelerated heating of the exhaust emission control devices, and thus, a reduction in starting emissions.

The invention provides a power-saving uninterrupted power supply system, comprising a first switch, a second switch, a transformer, a voltage stabilizer, a charging and current converter, a normal mode judging unit and a power switch, wherein when an alternating current power supply is stable, the first switch and the second switch are synchronously switched and conducted so that the alternating current power supply is used for directly supplying power to a load end, and simultaneously, the power switch is in a non-conductive state; and the voltage stabilizer and the transformer are not connected with the entity of the alternating current power supply. Therefore, when the alternating current power supply is stable, the voltage stabilizer and the transformer do not consume redundant power supply and the integrated conversion power of the uninterrupted power system provided by the invention can be effectively increased.

The invention discloses an EVA packaging glue film with an effect of improving solar assembly transition power. The EVA packaging glue film comprises a transparent front glue film and a white back glue film. The front glue film is prepared from 0.05-5% by mass of a cross-linking agent, 0.05-5% by mass an assistant cross-linking agent, 0.05-3% by mass of a coupling agent, 0.05-2% by mass of a hydrophobic agent, 0.02-1.5 parts by mass of a light stabilizing agent, 0.02-1.0% by mass of an antacid, 0.02-1.0% by mass of a UV transition agent and the balance EVA resin. The EVA packaging glue film has a low cost, high performances and high transition power, has lasting resistance to damp and hot, UV, PID and snail cracks in a photovoltaic system and satisfies photovoltaic assembly market requirements now and forever.

The invention relates to a tilting pluviometer for hydrogeology experiments. The tilting pluviometer for hydrogeology experiments includes a number one precipitation gauge, a number two precipitationgauge and a fixed pedestal, wherein the fixed pedestal is arranged at the bottom end of the apparatus body; an upper end fixed base is arranged at and supported by the upper end of the fixed pedestal;two sampling cup holding tubes are symmetrically arranged at the upper side of the upper end fixed base; the number one precipitation gauge is arranged at the middle position of the upper side of theupper end fixed base; a number one precipitation gauge outer tube is arranged at the outer side of the number one precipitation gauge; the number two precipitation gauge is fixedly arranged at the upper side of the upper end fixed base at one side of the number one precipitation gauge; and number two drainpipes are correspondingly arranged at two sides of a number two precipitation gauge outer tube. The size of the number two precipitation gauge provided by the tilting pluviometer for hydrogeology experiments is the half of the size of the number one precipitation gauge; and the number two precipitation gauge and the number one precipitation gauge are completely the same in the internal structural design, and for the structural design, two precipitation gauge tools with different size canbe used to measure in the same region, and then an average value is taken, thus being convenient for improving the measuring accuracy.

The invention relates to a wireless sensor network node power system based on vibrating mechanical energy. An energy managing unit is additionally arranged between an energy storing unit and a wireless network node; the energy managing unit can cut off the power supply to the wireless network node when the electric quantity of the energy storing unit is low so as to charge the energy storing unit; when the power is charged to a certain degree, electric is discharged to the wireless network node through the energy managing unit. The wireless sensor network node power system provides a practical way for a piezoelectric energy collecting device to charge the network node.

The invention discloses a two-phase interleaving flying capacitor bidirectional direct-current converter based on coupling inductors, and relates to the technical field of power electronics, the direct-current converter is in two-phase interleaving parallel connection, and the inductors between the two phases are magnetically coupled; comprising four groups of bridge arms, four flying capacitors, a pair of coupling inductors and two filter capacitors, the coupling inductors are in reverse coupling, each group of bridge arms is formed by connecting four power switch tubes in series, and the number of the power switch tubes is sixteen; the bidirectional boost-buck converter is characterized in that bidirectional boost-buck can be carried out, the voltage stress of each power switch tube is half of that of a voltage bus, ripple waves of output current can be reduced through staggered parallel connection, the conversion efficiency of the converter is improved, and the magnetic integration technology further reduces inductance and the size of the converter, and meanwhile the conversion efficiency of the converter is improved. The phase current ripple of each phase inductor is reduced, and the dynamic performance of the converter is improved. The method has good application and development prospects for the energy storage link of a new energy distribution power generation system such as light, wind and the like.

The invention discloses a voltage-sharing DC capacitor system for a large-power frequency converter, and the system comprises a first capacitor C1, a second capacitor C2, a first boost converter, a second boost converter, a first sampling resistor R1, a second sampling resistor, and a signal controller, wherein the first capacitor is in parallel connection with the first boost converter. The second capacitor C2 is in parallel connection with the second boost converter, and the first capacitor C1 is in parallel connection with the first sampling resistor R1. The second capacitor C2 is in parallel connection with the second resistor C2. The first capacitor C1 is in series connection with the second capacitor C2, and the firs sampling resistor R1 is in series connection with the second sampling resistor R2. The first sampling resistor R1 and the second sampling resistor R2 are respectively connected with the signal controller. The first and second boost converters are respectively connected with the signal controller. The first and second boost converters are connected with each other. The system in the above structure is simple in structure and is reliable and stable in voltage sharing of capacitors.

The invention discloses a fast-response soft-switching isolation inverter and a method, and belongs to the field of inverters. The device comprises a direct current input circuit, a direct current filter circuit, a buffer resonant circuit, a high-frequency conversion circuit, a fast response inversion circuit, an output low-pass filter circuit and a load circuit; the direct current input circuit is sequentially connected with the direct current filter circuit, the buffer resonant circuit, the high-frequency conversion circuit, the fast response inversion circuit, the output low-pass filter circuit and the load circuit, the load circuit is connected with an MCU control circuit through a first sampling circuit, and the MCU control circuit is connected with the fast response inversion circuitthrough driving circuits of switch tubes Q2 and Q3 and connected with the high-frequency conversion circuit through a driving circuit of a switch tube Q1. The method comprises the steps that on the original edge of a high-frequency transformer, the voltage and current of the power switch tube Q1 are both changed into zero in an LC resonant mode when the power switch tube Q1 is switched on and switched off, the soft switching action state of the power switch tube Q1 is kept, and the switch-on and switch-off losses of the power switch tube Q1 are reduced; on the subsidiary side of the high-frequency transformer, by controlling the power switch tubes Q2 and Q3 to be switched on and switched off, compared with existing inverters, the inverter has the advantages of being low in circuit loss, fast in load instantaneous response, high in intelligentization degree and low in cost.

The invention provides a contact seat for an electric switch machine. The contact seat comprises a contact seat base body, fixing plates used for assembling a static contact set and a support used forassembling a movable contact set. The support comprises a left support and a right support which are symmetrically connected to the contact seat base body through movable contact shafts respectively;a tension spring is arranged between the left support and the right support; fixing plates corresponding to the positions of the left support are arranged on the two sides of the left support respectively; fixing plates corresponding to the positions of the right support are respectively arranged on two sides of the right support; one end of the movable contact shaft is provided with an adjustingplate capable of rotating relative to the contact seat base body; and a tension spring is arranged between the right adjusting plate and the left adjusting plate. According to the contact seat for the electric switch machine, the tension spring between the left adjusting plate and the right adjusting plate and the tension spring between the left support and the right support form a double-tension-spring system, conversion power of the movable contact set is improved, and conversion stability of the movable contact set is improved.

The invention provides an L-band high-power fiber laser based on gain competition and same-band pumping. The described laser structure includes: a L-band laser seed source, a preamplifier stage fiberamplifier, an optical isolator, a power amplifier stage fiber amplifier, a wavelength division multiplexer, an auxiliary pump laser and a fiber collimator. The invention utilizes the gain competitionrelationship between the C (S) band laser and the L band laser in the doped gain optical fiber to realize the power amplification of the C (S) band laser firstly. When the C (S)-band laser power reaches a certain value in the doped gain fiber, the energy transfer from C (S)-band to L-band laser is realized by the same-band pump. When the gain fiber length is appropriate, most of the C (S) band laser energy will be absorbed, and ultimately achieve high conversion efficiency, high power L-band fiber laser output.

The invention provides an ammeter power supply circuit and an ammeter. The ammeter power supply circuit comprises a rectification filter circuit, a voltage regulating circuit, a high-frequency transformer, an output rectification circuit, an output filter circuit and a voltage feedback circuit. The voltage regulating circuit regulates the voltage of a high-voltage direct-current power supply according to a voltage regulating signal and outputs the regulated voltage to the high-frequency transformer; the high-frequency frequency converter carries out voltage reduction conversion on the high-voltage direct-current power supply after voltage regulation; a second high-frequency voltage pulse signal is output through a second secondary coil; the output rectification circuit rectifies a second high-frequency low-voltage pulse signal and then outputs the second high-frequency low-voltage pulse signal to the output filter circuit; the output filter circuit filters the rectified second high-frequency low-voltage pulse signal, low-voltage direct current is obtained and outputted, the voltage regulating circuit regulates the magnitude of the high-frequency voltage pulse signal output by the transformer according to the magnitude of the voltage outputted by the output rectification circuit, the conversion power is high, and when the input voltage changes, it is guaranteed that the output voltage is stable such that the voltage stabilizing range is widened.

The invention provides a single-stage high-voltage DC LED switching power supply comprising a main circuit and a control circuit. The main circuit comprises an HVDC input EMC unit, a non-isolating step-down switch circuit unit, an output EMC unit, a signal acquisition unit, a switch signal driving unit, and a first primary signal interface unit. The control circuit comprises a standby power supplyunit, a digital power controller unit, a signal isolation unit, a primary signal conditioning unit, a secondary signal conditioning unit, a communication programming interface unit, a second primarysignal interface unit, and a secondary signal interface unit. In the main circuit, an existing active flyback clamp method is improved to the flyback buck step-down circuit to improve the power conversion power. In the control circuit, an existing control module circuit is integrated with the standby power supply unit and the primary and secondary signal isolation coupling circuits. According to the invention, the power conversion efficiency is improved by limiting the implementation cost and complexity of the circuit.

The invention relates to a system (1) for distributing locally generated energy from at least one renewable direct-current source (2) to multiple local load units (3, 3', 3'') of the system (1), comprising, for each load unit (3, 3', 3''), an inlet (4) which is configured to be connected to an integrated network (10), an outlet (5) which is configured to be connected to at least one load (11, 11',11''), an inverter (6) having an inverter inlet (7) and an inverter outlet (8), wherein the inverter inlet (7) is connected to the direct-current source (2) and the inverter outlet (8) is connected to the inlet (4) and the outlet (5) of the respective load unit (3, 3', 3''), and wherein the inverter (6) converts a direct current at the inverter inlet (7) into an alternating current at the inverter outlet (8), as well as a power meter (13) having a power meter inlet (14) that is connected to the inlet (4) of the respective load unit (3, 3', 3'') in order to determine a current performance fromthe integrated network (10), and having a power meter outlet (15) that is connected to the inverter (6) of the respective load unit (3, 3', 3'') in order to transfer data relating to the current performance from the integrated network (10) to the inverter (6). The inverter (6) of the respective load unit (3, 3', 3'') determines an input DC voltage applied at the inverter inlet (7), and determinesa current power to be converted from the applied input DC voltage and the transferred performance data. The system can form part of a retrofitting kit for an electrical distributer.

The invention relates to the technical field of photovoltaic cells and particularly relates to a multilayer fluorescent packaging adhesive film. The multilayer fluorescent packaging adhesive film comprises an upper release paper layer and a lower release paper layer, wherein an adhesive film layer is arranged between the upper release paper layer and the lower release paper layer and comprises anupper EVA adhesive film layer, an organosilicone transparent silica-gel layer and a lower EVA adhesive film layer, the upper and lower EVA adhesive film layers are filled with a plurality of fluorescent powder, the organic transparent silica-gel layer is filled with a plurality of photodiffusion particles, a cross section of the upper EVA adhesive film layer is trapezoidal, and a cross section ofthe packaging adhesive film is trapezoidal after hot fusion. According to the multilayer fluorescent packaging adhesive film disclosed by the invention, ultraviolet light can be converted into visiblelight of specific wavelength by the adhesive film, the visible light can be converted into electric energy by a photovoltaic module, and thus, the conversion power of the photovoltaic module is increased; and the organosilicone transparent silica-gel layer is arranged between the two EVA adhesive film layers, so that the thermal shrinkage ratio of the packaging adhesive film is lowered, the condition that a local area between two back plates is free of the adhesive film due to thermal shrinkage of the adhesive film is avoided, and the consumption of the adhesive film is lowered.

The invention discloses a yacht and a power supply system thereof. The power supply system integrates solar energy, wind energy, tidal and ocean wave energy and thermoelectric generation, therefore, the offshore resources are utilized to the maximum extent, power for driving the yacht to run is greatly increased, and the yacht provided by the invention can sail at intermediate and remote distances and is suitable for sailing under various weather conditions.

A residual heat direct removal system based on a coupling heat pipe technology comprises two stages of heat pipes. A heat absorption area of the first-stage heat pipe is inserted into a heat conduction base of a nuclear reactor core, heat exchange is carried out between the heat absorption area of the first-stage heat pipe and fuel rods distributed in the base in a staggered mode, and heat is transmitted to a thermoelectric power generation device arranged in a heat release area of the heat pipe through the heat pipe, and the heat pipe serves as a hot end of the thermoelectric power generation device. A heat absorption area of the second-stage heat pipe is arranged at the cold end of the thermoelectric power generation device to take away residue heat which is not utilized in the thermoelectric conversion process, a heat release area of the second-stage heat pipe is arranged in the middle of a double-layer shell, and heat is transferred to seawater between the inner shell and the outer shell from the heat release area in a convective heat transfer mode. An efficient heat pipe technology is adopted, the energy transmission and cooling efficiency is improved while it is guaranteed that the structure is compact, safe and reliable, and the conversion power is improved. The safety and the stability of an underwater unmanned underwater vehicle are greatly improved. The passiveness of the system is guaranteed, the structure is closed in the whole process and is safe and stable, no impurity enters the system, and the system is pollution-free and corrosion-resistant.

The invention belongs to the technical field of glass, and proposes a treatment method for improving transmittance of solar super-white rolled glass. By adopting the treatment method for improving transmittance of the solar super-white rolled glass provided by the invention, the solar super-white rolled glass is processed by adopting methods of cleaning, drying, high-temperature heating, stoving, cooling, and cleaning and drying again, so that a Na2SO4 layer is formed at the surface of the solar super-white rolled glass. The transmittance of the glass can be increased by the Na2SO4 layer according to the optical principle, the transmittance of the solar super-white rolled glass at the wave band of 380-1100nm is further improved, and the transfer power of a solar cell system is indirectly improved.

The invention discloses a multi-channel zero conversion time power supply system for a marine inertial navigation device. The multi-channel zero conversion time power supply system for the marine inertial navigation device includes a marine electricity alternating current power source G1, a marine electricity direct current power source G2, an emergency power supply G3 and a navigation device inertial navigation system (INS); and also includes a voltage detection chip N1, a single chip N2, a Darlington array driver chip N3, and solid state relays SSR1, SSR2 and SSR3; the single chip N2 samplespower supply voltages of the marine electricity alternating current power source G1, the marine electricity direct current power source G2 and the emergency power supply G3 by the voltage detection chip N1, and supplies power to the navigation device INS according to a sequence that the marine electricity alternating current power source G1 supplies power first, the marine electricity direct current power source G2 supplies power subsequently, and the emergency power supply G3 supplies power finally. In the multi-channel zero conversion time power supply system for the marine inertial navigation device, the main, standby, and emergency power sources have a clear power supply sequence and high stability, thus switching with zero-switching time can be realized with high efficiency and powercan be supplied to the navigation device stably.

The invention discloses a centralized high-power MPPT off-grid photovoltaic controller, which characterized by comprising four sets of solar panel terminals S+ and terminals S-, and the solar panel terminals S+ are connected with the inverter through an anti-reverse diode module. The inverter is connected with one end of a DC circuit breaker and a driver respectively, and the other end of the DC circuit breaker is connected with an auxiliary power source through an emergency stop switch and a power source indicator lamp, and the auxiliary power supply provides a working power source for the controller and the DC high-speed fan respectively, and the controller is connected to the DC high-speed fan, the driver, the display screen and the matrix key, respectively. The centralized high-power MPPT off-grid photovoltaic controller adopts the four-phase staggered synchronous buck design based on the IGBT half-bridge module to reduce the size of the current in the conducting circuit so that the volume of the circuit is reduced, the weight is reduced, the switching power becomes larger, and the loss of the system is reduced. The battery charging speed is improved, while the battery life is prolonged.

The invention relates to an adaptive active piezoelectric energy acquisition device, which consists of a main circuit and a control unit thereof. A switching tube is connected in parallel with each diode of a full-bridge rectification unit. A direct current unit is a Buck circuit, and a switching tube of the Buck circuit is connected to the positive pole end of a charging capacitor. A current acquirer is arranged on the alternating current side of the full-bridge rectification unit. A power acquirer is arranged at the output end of the Buck circuit. An acceleration sensor for acquiring the frequency of external exciting force is also arranged in the main circuit. In order to adaptively obtain optimal control voltage, a power acquisition unit of a singlechip acquires an output power value in real time, and the optimal control voltage is adaptively regulated, so that the device works in a resonant state to maximally obtain mechanical energy, a damping period is shortened, the conversion power of the mechanical energy is improved, and impedance matching in realized in an electric energy transmission process to realize electric energy power output. When a system vibrates at frequency greatly deviated from fixed frequency, the energy acquisition power of the system cannot be greatly reduced.