180 results about "Absorbed power" patented technology

The present invention provides a power control circuit connectable to a load adapted to receive a power supply, the power control circuit adapted to absorb power from the power supply and adapted to deliver power to the power supply to stabilize at least one electrical parameter of the power supply. The present invention also provides an associated method of stabilizing at least one electrical parameter of a power supply connectable to a load, the method including absorbing power from the power supply or delivering power to the power supply. The at least one electrical parameter of the power supply includes parameters such as voltage and frequency.

An optical fiber system that includes an in-fiber optic component powered by in-fiber light includes an optical fiber having a core, wherein the optical fiber propagates a sensing/signal light and a power light, with the sensing/signal light being propagated in the core. An optical transducing element, such as a layer of light absorbing material, is located in proximity to the in-fiber optic component. An optical tap region is provided in the optical fiber in proximity to the optical transducing element, and enables the power light to leak from the optical fiber and be absorbed by the optical transducing element. The optical transducing element converts the absorbed power light into a second energy form, such as heat, which is used to tune the in-fiber optic component.

The invention discloses a three-frequency band near-infrared absorber based on a semiconductor super-surface structure, and belongs to the field of metamaterials. The three-frequency band near-infrared absorber sequentially consists of a substrate, a metal film layer and a semiconductor super-surface structure layer from bottom to top, wherein the semiconductor super-surface structure layer consists of a semiconductor particle array and a semiconductor film layer. The three-frequency band near-infrared absorber based on the semiconductor super-surface structure has the advantages that by reasonably designing the geometric size and lattice cycle of the semiconductor super-surface structure layer, the electromagnetic wave which is transmitted into the structure surface is completely absorbed; the structure is simple, the near-infrared band absorbing is realized, and three absorbing peaks are provided; the electromagnetic wave absorbing power is made of the semiconductor material, so that the limitation of only production of single resonance absorbing peak by the single size of the traditional metal resonance unit is overcome, and the absorber is applied into the fields of photoelectrical detection, photoelectrical conversion, production and collection of photo-induced electrons and thermal electrons, absorbing of electromagnetic energy, and the like.

The present invention provides an aluminum composite material having neutron absorbing power that improves the ability to absorb neutrons by increasing the content of B, while also being superior to materials of the prior art in terms of mechanical properties and workability. The aluminum composite material having neutron absorbing power contains in Al or an Al alloy matrix phase B or a B compound having neutron absorbing power in an amount such that the proportion of B is 1.5% by weight or more to 9% by weight or less, and the aluminum composite material has been pressure sintered.

The invention discloses a polyvinyl-alcohol imbibition sponge material and a preparation method thereof. The method comprises the steps of firstly, mixing polyvinyl alcohol and distilled water, and dissolving in water bath with the temperature of 50-95 DEG C, so as to obtain a polyvinyl-alcohol aqueous solution; adding a cross-linking agent, a catalyst, a foamer, a pore filling agent and an auxiliary foamer into the polyvinyl-alcohol aqueous solution, and uniformly stirring and mixing in water bath with the temperature of 30-80 DEG C; pouring a uniformly-mixed emulsion into a mold, and carrying out crosslinking reaction at the temperature of 30-90 DEG C; reacting for 30-60 minutes, after pores are formed, maintaining the temperature, and further heating to solidify for 2-8 hours, thereby obtaining the polyvinyl-alcohol imbibition sponge material. The sponge is uniform in pore, strong in water absorbing power, good in flexibility and viscoelasticity and good in biocompatibility, has the advantages of low cost, environment friendliness, simple process and the like, and has broad prospects for development in the fields of aquatic product processing, food, clinical medicine, water treatment and the like.

A switchable birdcage coil functioning as a transmitter coil and a separate RF surface coil functioning as the receiver coil are utilize in NMR and MRI apparatus. To prevent the switchable birdcage coil from absorbing energy by coupling to the receiver coil or by absorbing power from the RF field produced by the precessing nuclear spins, one or more of the reactive elements of the birdcage coil are switched from a normal reactive impedance state to a high impedance state. The high impedance state is formed by switchably combining the reactive element with a complementary reactive element thereby forming parallel resonant high impedance circuit that is tuned to resonate at the NMR frequency.

The invention discloses a unified power quality controller suitable for fault ride-through and a control method. A UPQC is connected on the two sides of a photovoltaic power station exit transformer in a bridging mode, and the amplitude of an inverter exit voltage in a high voltage failure is compensated to keep the amplitude in a rated value. The harmonic component of a network voltage is compensated through a UPQC system, the exit voltage THD of a photovoltaic grid-connected inverter is close to 0, and the failure test speed and the response speed of the photovoltaic grid-connected inverter in a photovoltaic power station are improved. Reactive compensation benefits are provided by the UPQCs under the condition the volume design of meeting high voltage ride-through with a 1.3-time rated value. When a low voltage drops, the photovoltaic power station is matched to generate reactive power, the requirement of a power grid for photovoltaic power station reactive power can be met faster, and in a high voltage failure, an APF absorbs power grid reactive power to help to restore a power grid voltage.

A crosslinked polymer (A) which comprises, as essential structural units, units derived from (a) one or more vinyl monomers selected from the group consisting of water-soluble vinyl monomers and/or vinyl monomers which become water-soluble upon hydrolysis and units derived from (b) a crosslinking agent and which satisfies the following requirements: (1): (X) >/= 25g/g, (2): (Y) >/= 15g/g, and (3): (Y) >/= -0.54 (X) + 41. It has exceedingly high water retentivity and exceedingly high absorbing power under load. When applied to an absorbent structure and an absorbent article, the polymer has excellent absorbing performance. In the relationships, (X) is the amount of physiological saline retained through 1-hour absorption and (Y) is the amount of physiological saline absorbed through 1-hour standing under a load of 60 g/cm<2>.

The present invention provides a control system and method for matching excavator power, wherein the method comprises the steps of: setting a limit load control current value corresponding to various gears of an engine; detecting the position of a gear knob and determining the current gear of the engine; searching the limit load control current value corresponding to the current gear from the limit load control current values corresponding to various gears of the engine; and supplying a limit load control current with the size of the limit load control current value to the limit load control proportional valve for controlling an absorbed power of a hydraulic pump. The method prevents the engine from seriously turning when the excavator begins to work; frequent revolving speed adjustments are not needed for powers are not matched; and the load of the engine is reduced.

The present invention relates to an excavator all-power control system and its method. Said system mainly includes the following components: main pump, feedforward-feedback regulator, PID regulator and electro-hydraulic proportional valve. Said invention also provides the concrete steps of its control method. Said system not only can save energy, but also can raise power utilization rate, and can implement completely matching of absorption power of oil pump and output power of diesel engine.

Provided is a detector, a gas scrubber comprising the detector for identifying a residual lifetime of an absorbent material contained in a gas scrubber for purifying a harmful exhaust gas, and a method of identifying the residual lifetime of the absorbent material. The detector comprises a solid chemical material, the color of which changes when it comes in contact with the untreated exhaust gas due to loss of absorbing power of the absorbent material, a detection window containing the solid chemical material therein, therethrough the visual identification of the color change of the solid chemical material can be made, and connecting units placed on an upper and lower end of the detection window. The visual identification of the color change of the solid chemical material through the detection window enables the continuous and safe identification of the residual lifetime of the absorbent material and the replacement time, thereby increasing the reliability of the gas scrubber.

The invention relates to an ultralow-hydrogen high-toughness submerged arc welding flux core and a submerged arc flux-cored wire. The welding flux core comprises the following components of: CaF2, Na2SiF6, ReF, BaCO3, CaCO3, MgO, TiO2, SiO2, ZrO2, boride, Na2O, K2O, Mn, Al-Mg, Ni, Ti, Si, Re and the balance of Fe. When the welding flux core is matched with a high-alkalinity sintering welding flux, the weld metal has the impact absorbed power of more than 80J at the temperature of 60 DEG C below zero; when the welding flux core is matched with a low-hygroscopicity smelting welding flux, the weld metal has the impact absorbed power of more than 90J at the temperature of 40 DEG C below zero; and when the welding flux core is matched with any one welding flux, weld diffusion hydrogen content is less than 5ml/100g. The standard specific ultralow-hydrogen range is achieved; and the submerged arc flux-cored wire is high in cold crack resistance, has high in fracture toughness value, is suitable for low-alloy high-strength steel and can be used for welding important structures.

The invention relates to a connection structure of an automobile seat, in particular to a power-absorbing structure of the automobile seat, which can deform in the collision process. The power-absorbing structure solves the problem that the necks of passengers in rear-end vehicles are easy to sprain during rear-end collision. The power-absorbing structure comprises a seat harness and a seat cushion, wherein the bottom ends at both sides of the seat harness are respectively installed at the rear ends of both sides of the seat cushion through a connecting board. The power-absorbing structure is characterized in that the lower side of the connecting board is provided with a front installing pin and a back installing pin, wherein the front installing pin is hinged on the seat cushion, and the back installing pin is installed on the seat cushion through a buffer power-absorbing device. When the rear-end collisions happens, the power-absorbing structure can deform to absorb power through the buffer power-absorbing device so as to protect the safety of the passengers and avoid spraining the necks of the passengers.

The invention provides a regenerative braking control method and device and belongs to the technical field of electric vehicles. The regenerative braking control method comprises the steps of obtaining a braking total power according to a braking demand of the electric vehicle in the electric vehicle running process; obtaining a battery absorbed power of the electric vehicle; if the battery absorbed power does not exceed a preset threshold, obtaining a consumable power of an accessory energy-consuming facility of the electric vehicle; distributing the braking total power to a first electric braking power and a first mechanical braking power according to the braking total power and the consumable power of the accessory energy-consuming facility; carrying out regenerative braking according to the first electric braking power; and carrying out mechanical braking according to the first mechanical braking power. According to the regenerative braking control method and device, when a batterycannot recycle energy generated by braking of a motor, the energy generated by the braking of the motor can be recycled by using an original device, such as the accessory energy-consuming facility, of the electric vehicle so that the regenerative braking can also be carried out when the battery cannot recycle the energy; and therefore, the braking safety is enhanced.

The invention discloses a light storage combined grid-connected system. The light storage combined grid-connected system comprises a photovoltaic array, a three-phase inverter main circuit, a filter circuit, a power grid, a bidirectional DC/DC converter, an acquisition module, a maximum power point tracking (MPPT) calculation module, a DC voltage/AC current double-loop control module, a bridge arm voltage modulation wave generation module, a battery current/battery voltage acquisition module, a battery DC current calculation module, a battery current closed-loop control module and a DC/DC converter modulation wave generation module which are sequentially connected. With a control method based on the system, the light storage combined grid-connected system can participate in the process of frequency modulation of the power grid like a traditional power generator set, the bidirectional DC/DC converter participates in frequency modulation to transmit or absorb power to or from the power grid when the frequency of the power grid is abnormal, the unfavorable influence of a pure photovoltaic power generation system on the power grid is reduced, and the grid-connection adaptability of a new energy grid-connected system is greatly improved.

A radio frequency (RF) generator having an effective source impedance Z_g at a reference point (e.g. at the generator output) includes a reference input and controls the magnitude and phase with respect to a signal received at the reference input of K(v+Z_gi) at the reference point where v and i are the voltage at the reference point and current out of the generator at the reference point, respectively, and K is a scalar. The generator maintains control of K(v+Z_gi) when delivering and when absorbing power.

The invention provides a method for controlling maximum power tracing based on wind power generation. The method comprises the step of setting original values of parameters such as the step length, the adjusting frequency and the stopping power tracing threshold, the step of sampling a voltage, a current and a frequency and the step of judging and adjusting the frequency. The whole operating process is precise and simple, easy to implement and high in practicability. Multi-dimensional control is carried out by changing the step length, the tracing frequency and the stopping power tracing threshold, the dynamic performance of tracing is improved, and the accuracy of tracing is increased. The strategy of absorbing power dynamically at intervals is adopted, when the wind speed is low and the revolving speed of a draught fan is low, the problems of stalling operation and rotation stopping of the draught fan are solved, and practicability is high. When it is judged that the revolving speed of the draught fan is not changed consecutive several times, continuous tracing after adjustment is carried out on the step length, the tracing frequency and the stopping tracing power threshold, a forced restarting and tracing mechanism is adopted, the problem of invalid tracing caused by non-changing of the measured revolving speed for a long time is solved, the situation that the wind speed fluctuates along with the wind speed is adapted, and the tracing accuracy is improved.

The invention discloses a method for monitoring and processing the tail gas of excavators. A sensor in a particulate filter collects information and transmits the information to a main controller through an engine controller; and the main controller receives the information and transmits the information to a display device. The method is characterized in that the preset step is carried out in advance; the starting pressure and finishing pressure of the regeneration control is set by detecting an excavator; when the engine controller detects that the difference of the inlet pressure and the outlet pressure of the particulate filter is more than the preset start pressure, and the temperature of the particulate filter is not less than 250 DEG C, automatic regeneration is carried out; and when the difference of the inlet pressure and the outlet pressure of the particulate filter is more than the preset start pressure, and the temperature of the particulate filter is less than 250 DEG C, a manual regeneration switch is turned on, the main controller improves the absorbed power of a main pump, increases the output load of an engine to increase the exhaust temperature of the engine, and the manual regeneration is carried out. The invention can effectively monitor and process the particulate filter, and avoid from impacting the whole machine to work due to the damage of the particulate filter.

The invention provides a high-efficiency high-altitude propeller with an extremely low Reynolds number and a high-altitude unmanned aircraft. The propeller is a two-paddle propeller, and comprises a first paddle and a second paddle, wherein the first paddle and the second paddle are arranged symmetrically to a shaft of the propeller; the propeller has the diameter of 4-5 m and the maximum chord length of 400-600 mm; through a wing section of the high-lift and low-Reynolds number propeller, the paddles with wider inner sides and featured with paddle tip sweepback are designed out, and both the first paddle and the second paddle have sweepback geometrical features within the range of 80-90% R, have the sweepback ranges of 0-0.05 R, and have the maximum chord widths within the range of 35-45% R; the propeller works in a flow state of the extremely low Reynolds number of 10,000-100,000, and in a long-time cruise state at a 25-30 km altitude, the propeller has the absorbed power of 6-10 kilowatts; the propeller has the efficiency greater than 80%, which can reduce energy demand of a propulsion system of the high-altitude unmanned aircraft.

A power generation system includes a generator mechanically coupled to an engine to generate electrical power and a fault ride through system connected between the generator and a power grid. The fault ride through system includes a mechanical switch connected in parallel with a solid state switch and a resistor to absorb power from the generator during a grid fault condition. The mechanical switch and the solid state switch are controlled in coordination with the engine.