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

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 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 single-stage high-voltage DC power supply LED switching power supply, including a main circuit and a control circuit; the circuit includes an HVDC input EMC unit, a non-isolated step-down switch circuit unit, an output EMC unit, a signal acquisition unit, and a switch signal drive unit and the first primary signal interface unit; the control circuit includes a standby power supply unit, 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 primary signal interface unit and a secondary level signal interface unit. In the main circuit, the existing active flyback clamp method is improved to a flyback buck step-down circuit to increase the power conversion power; in the control circuit, the existing control module circuit is integrated with the standby power supply unit and the primary and secondary signal isolation coupling circuit Together. The implementation of the present invention can effectively improve the power conversion efficiency by limiting the implementation cost and complexity of the circuit.

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 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 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 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 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.

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 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 coil is 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.