52results about How to "Reduce power supply capacity" patented technology

In an aircraft galley, a power network distributes power from a source to electrical consuming devices (oven, water boiler, coffee machine, trash compactor, etc.). A control unit is connected to and can individually address each of the devices via a databus. The control unit compares the actual existing power consumption to a prescribed maximum value. If the actual consumption reaches the maximum value, the control unit calls up a power reduction procedure from a catalog in a database, and provides corresponding control signals to one or more of the devices to reduce the power consumption below the maximum value. The individual devices receive power in a time-sharing, power-sharing, or time-staggered manner. An intelligent distribution of available power resources avoids power overloads, and allows optimal utilization of all galley devices without limiting the normal catering process.

There is provided an in-vivo information acquisition apparatus capable of detecting high-accuracy in-vivo information substantially at the same time in a plurality of different examination sites in a body cavity and an in-vivo information acquisition apparatus system capable of introducing a plurality of in-vivo information acquisition apparatuses into a patient at the same time. The in-vivo information acquisition apparatus includes a specimen-collecting section for collecting a specimen at an examination site in a body cavity, a specimen-evaluating section for evaluating the specimen collected by the specimen-collecting section and outputting an evaluation result, a labeling section having identification information unique to the in-vivo information acquisition apparatus, a communication section for receiving a signal transmitted from the outside and for transmitting to the outside the evaluation result output by the specimen-evaluating section, and a power supply section for supplying electrical power.

The invention relates to the siphon water intaking technology, in particular to a vacuum pump-assisted siphon water intaking device and a method. The device comprises a siphon pipe, a water duct, a vacuum pump communicated with the top part of the siphon pipe, and a valve arranged at the water outlet end of the water duct. The method is implemented as follows: at the starting stage, air in the siphon pipe and the water duct is exhausted by the vacuum pump, the water level rises to tank up the siphon pipe and the water duct, the vacuum pump is stopped, and the valve at the water outlet end of the water duct is started to perform siphon water intake; and at the running stage, when air gathers in the siphon pipe, the vacuum pump is started to exhaust the gathered air so as to ensure continuous and stable operation of a siphon water intaking pipe without water interruption. The invention solves the problems of difficult starting and instable operation of siphon water intaking of a large pipeline, improves the normal suction head of the siphon pipe, and saves engineering cost and operation power consumption respectively by over 90% compared with the method of establishing a pump station.

There is provided an in-vivo information acquisition apparatus capable of detecting high-accuracy in-vivo information substantially at the same time in a plurality of different examination sites in a body cavity and an in-vivo information acquisition apparatus system capable of introducing a plurality of in-vivo information acquisition apparatuses into a patient at the same time. The in-vivo information acquisition apparatus includes a specimen-collecting section for collecting a specimen at an examination site in a body cavity, a specimen-evaluating section for evaluating the specimen collected by the specimen-collecting section and outputting an evaluation result, a labeling section having identification information unique to the in-vivo information acquisition apparatus, a communication section for receiving a signal transmitted from the outside and for transmitting to the outside the evaluation result output by the specimen-evaluating section, and a power supply section for supplying electrical power.

This invention relates to a method for changing the unblocked cabinet adopted in traditional computer and its server into locked one to prevent harm dust does to computer, characterized in adopting present ceramic semiconductor refrigerator to supply cold source for blocked cabinet, temperature of cabinet used in computer and its server being controlled in the range of from 25Deg.C to 30Deg.C under the effect of controlling temperature circuit to make the computer and its server safely and stably work in clean environment and suitable temperature.

The invention discloses an electric vehicle equipment power supply and distribution method, and relates to the field of power supply and distribution. The electric vehicle equipment power supply and distribution method aims to achieve the purposes that electric vehicle charging devices are wide in range, high in density and low in distribution spot cost. Traditionally, a bus of street lamps is provided with a power supply unit additionally for charging an electric vehicle, the bus supplies power all day, and the street lamps can be controlled to be turned off. The bus of the street lamps is divided into a plurality of sections in an isolating mode, and supplement power sources supply power in a subsection mode, so that the power supply capacity is multiplied. Isolating switches among the sections achieve combination of the sections and power supply changeover. On-site or remote communication is utilized for achieving recognizing, controlling, measuring and paying. When the street lamps are all used, semiconductor energy-saving lamps are used, a part of the lamps are turned off or used with the power reduced at midnight and the lamps are out of use in the daytime, electricity can be used by equipment such as electric vehicles day and night on the bus in a high power mode. The method can be applied to lines such as the street lamps which can be used discontinuously or of which the electricity load can be reduced, charging piles can be constructed widely and compatibly, so that the small electric vehicles can be charged at the early stage, electric cars can be guided to develop at the later stage, and a general and practical intelligent instrumented micro grid can be formed.

The invention relates to a direct current feed type motor testing system, belongs to the technical field of testing of motors and is used for measuring rotational speed, rotational moment, power, efficiency and other parameters of the tested motor. The direct current feed type motor testing system comprises at least two independent AC / DC (alternating current / direct current) converters, a direct current power generator and a rotational speed and rotational moment sensor. The inputs of the two independent AC / DC converters are respectively connected with an alternating current input busbar of a power grid, wherein the direct current side of one AC / DC converter is connected to a direct current busbar of the tested motor; and the direct current side of the other AC / DC converter is connected with the output of the direct current power generator in series and then connected to the direct current busbar of the tested motor, the output of the AC / DC converter is regulated to realize feedback of electric energy and regulation of the rotational moment of the tested motor, the overall power supply capacity of the system is reduced by utilizing the feedback energy and the efficiency of the system is improved.

In an elevator system (1000), a riding destination floor call registration device (100A, 100B) arranged at an elevator riding place is provided with such a handicapped person button (102) that a user declares to be a handicapped person separately from destination floor registration buttons (101) of a numeric keypad or the like with respective numerical buttons of 0 through 9 for registering a destination floor. When the handicapped person button (102) is pushed and the a destination floor call is input at the riding destination floor call registration devices (100A), for example, a group management control device (300) registers the destination floor call, determines an elevator car allocated to the destination floor call, rings a chime corresponding to the allocation determined elevator car, and turns on a hall lantern. In this way, the group management control device (300) rings the chime and turns on the hall lantern only when the handicapped person button is pushed.

The invention discloses an oil pumping unit system with multiple sections of steam injection packer parts. The oil pumping unit system comprises an oil pumping unit body, a steam injection thermal production oil pump and a packer assembly. The oil pumping unit body is connected with the steam injection thermal production oil pump through a traction system of the oil pumping unit body. The steam injection thermal production oil pump is connected with the packer assembly through a release sub. The packer assembly comprises the release sub, a first oil discharging pipe, a first side sealing spindle, a second oil discharging pipe, a second side sealing spindle, a third oil discharging pipe, a third side sealing spindle, a packer body, a one-way valve, a first spraying head, a second spraying head, a sealing ring, a fourth oil discharging pipe, a third side sealing spindle, a fifth oil discharging pipe, a fourth side sealing spindle, a third spraying head, a ventilation pipe, a cable inletguiding part and a side gas pipeline.

The invention relates to a model coil of an interturn insulation test of an oil-immersed power transformer and a winding method of the model coil. Specification parameters of the coil and a category of insulation paper are the same as those of the transformer. The coil is divided into an upper cake and a lower cake, wherein each cake is subjected to parallel winding by two paper wrapped wires A and B; two first tangling positions of a connecting part of the two cakes are wrapped with at least six layers of insulation paper; the two first tangling positions are located on an inner ring of the coil; a distance between the two first tangling positions is half perimeter of a lead wire of the inner ring; the head end and the tail end of each paper wrapped wire are connected together; the two paper wrapped wires serve as a high-voltage outgoing wire and a low-voltage outgoing wire respectively; an ellipse is defined by four leading-out terminals of the paper wrapped wires; the high-voltage outgoing wire and the low-voltage outgoing wire of the coil are arranged at the two ends of a long axis respectively; a short axis is coincided with a straight line formed by the two first tangling positions of the two paper wrapped wires and is equal to the diameter length of an excircle of the coil; and each of the paper wrapped wires from tangent points to end points of the leading-out terminals is additionally wrapped with at least six layers of crepe paper to reinforce insulation. The coil can effectively simulate breakdown characteristics of an interturn oil paper compound insulation system and a development process of electrical aging and thermal aging under a working condition of the large transformer, and is simple to manufacture.

The invention relates to a railway switch anti-ice / snow solution for automatically melting down ice and snow at the closely jointed parts of a switch. A radiant railway switch de-icing / snow removing system comprises an intelligent power source, an intelligent controller and a radiator, wherein the intelligent power source is connected to the radiator through the intelligent controller and a buried cable; the radiator is arranged inside after a switch stock rail and a point rail are closed up; the radiator is fastened to the rail web of the switch stock rail by means of a clamp; and the radiator is started according to an instruction to directly melt down accumulated snow at the closely jointed parts of the switch by means of the infrared radiation heating technology. The device of the system is simple and convenient to mount without interference with any other railway electrical system; the working time is short; heat energy conversion and de-icing and snow removal efficiencies are high; and in the working process, reliable de-icing and snow removal at the closely jointed parts of the switch can be ensured; therefore, turn-out and locking of the switch in place are ensured and railway transportation is normal.

The invention discloses a converter power module hedging test system which aims to reduce the power supply capacity of converter power module test. The system disclosed by the invention is provided with a power system, a control system and even sets of reactors, wherein the reactors are electrically connected with a tested power module; the power system supplies power to the tested power module; the control system outputs a SPWM waveform enabling the power modules to output reactive current with the same direction and opposite directions; and then, half of the power modules output inductive reactive current while the other half of the power modules output capacitive reactive current. Compared with the prior art, in the invention, the total instantaneous reactive power of the power modulesis zero in the test process; a module full-voltage and high-current continuous test can be conducted for a power device, the power modules and even the whole machine simply by using a small-capacity power system; the power capacity and the power loss required for a high-voltage and high-current continuous test of the power device are reduced; the construction cost of the test device is lowered; and the working efficiency of power module test is effectively improved.

A paper discharge roller pair, a roller support member, a support member rotation mechanism, a drive transmission unit, and a single drive source are provided; the paper discharge roller pair has a second roller disposed opposite to the first roller; the roller support member is freely rotatably supported The first roller can move between the first position where the first roller can cooperate with the second roller to discharge the sheet and the second position where the first roller is separated from the second roller; the support member turning mechanism makes the roller support member Rotation; the drive transmission part transmits the drive to the support member rotation mechanism; the single drive source transmits the drive to the drive transmission part. The roller support member is provided with a tooth-less gear portion and a cam stopper portion, and the support member turning mechanism has a tooth-less gear and a cam respectively corresponding to the tooth-less gear portion and the cam stopper portion of the roller support member, so that the roller support member can be Movement from the first position to the second position and movement of the roller support member from the second position to the first position.

The invention discloses a floor type multi-rope oil extractor system. The system comprises an oil extractor main body, a gas injection thermal recovery oil extracting pump and a packer module; the oilextractor main body is connected with the gas injection thermal recovery oil extracting pump through a traction system thereof; the gas injection thermal recovery oil extracting pump is connected with the packer module through a hand-free joint; the oil extractor main body comprises a concrete foundation, a shifter guide rail, a rail clamper module, a control cabinet, a bracket, an adjustable balance counterweight, an upper platform, an upper guard combination, a power device, a brake, the traction system and an elevator; the traction system comprises a traction wheel, a steel wire rope, a movable pulley set and a steel wire rope joint; the steel rope is divided into an elevation steel wire rope and a balance steel wire rope; one end of the elevation steel wire rope is fixed on the traction wheel and bypassed through the traction wheel, and the other end is fixedly connected with the steel wire rope joint on the bracket through the elevator and the movable pulley on the elevator; andthe balance steel wire rope is opposite to the elevation steel wire rope, one end is fixed on the traction wheel and bypassed through the traction wheel, and the other end is fixedly connected with the steel wire rope joint on the bracket through the adjustable balance counterweight and the movable pulley on the adjustable balance counterweight.

The invention discloses a test device carrying out generator iron core magnetization under voltage and a method thereof; the test device comprises the following units: switchgear connected with a voltage source and having over-current and open-phase protection; a rectification inversion module connected with a switchgear outgoing line so as to continuously adjust voltage amplitude and frequency; an excitation transformer connected with the rectification inversion module so as to lift up the test voltage outputted by the rectification inversion module; a high capacity single-phase wattless automatic compensation module connected with the excitation transformer so as to compensate the wattless current in the test voltage and reduce the power supply capacity needed in the test; an excitation coil connected with the excitation transformer and used for inducing magnetic flow on a generator sample in the test, wherein the excitation coil is in one turn, and formed by a plurality of insulation cables arranged in parallel; a control table respectively connected with the switchgear, the rectification inversion module and the high capacity single-phase wattless automatic compensation module, and controlling same. The test device and method can reduce the test needed power supply capacity, and can simplify test wiring, thus reducing test preparation time.

The image forming apparatus comprises: a liquid ejection head which has a plurality of nozzles and a plurality of pressure generating elements corresponding to the nozzles, and applies a drive signal to the pressure generating elements so as to eject recording liquid from the nozzles; a plurality of drive waveform generating circuits which generate the drive signal having waveform for driving the pressure generating elements; a plurality of dummy capacitive loads which are connected to the drive waveform generating circuits; and a circuit selection device which selects at least one of the drive waveform generating circuits for applying the drive signal to at least one of the pressure generating elements and the dummy capacitive loads.

In a method of manufacturing an electron source, a plurality of row wirings, a plurality of column wirings, and a plurality of pairs of conductive films arranged in a matrix by the plurality of row and column wirings, are formed on a substrate, each pair of conductive films being formed through a gap. After then, a row wiring is selected among the plurality of row wirings in the presence of an activation substance source, and a substantially same constant voltage is applied to each of a plurality of pairs of conductive films connected to the selected row wiring, while a predetermined voltage is applied to at least specific pairs of conductive films among a plurality of pairs of conductive films connected to unselected row wirings of the plurality of row wirings.

The invention discloses an active electric power filter device with a self-testing function and a testing method. A control system of the active electric power filter device comprises a man-machine interface, a filtering module and a harmonic wave source module, wherein the filtering module and the harmonic wave source module are connected with the man-machine interface at the same time. During testing, the power supply capacity of a tested place is not required to be larger than the rate capacity of the active electric power filter device, and only relatively smaller power supply capacity is required, so that the cost for a transformer, a conducting wire, a switch and the like can be reduced greatly; a test platform does not need to provide an extra harmonic wave source load, and one of tested active electric power filter devices in the test platform can serve as a harmonic wave source load, so that the cost can be saved correspondingly; and an experimental platform comprises two tested active electric power filter devices, and the two active electric power filter devices can be tested at the same time, so that the test efficiency can be improved, and the productivity can be increased.

The invention discloses a method for assisting a ship berthing at a port to use shore power. Historical information about that the ship is connected with shore power is shared through information interaction between a ship shore power data center and a port shore power data center, the berthing direction of the ship is guided and a ship user is guided to select appropriate shore power capacity byautomatically searching historical berthing information of the ship before the ship berths at the port; in the inspection work before ship-shore connection, an operator can be clearly indicated to test a safety circuit, the uncertain problems caused by non-unified design standards of safety circuits, un-real-time updating of late transformation information and the like are avoided, and the serviceefficiency of port shore power is improved. A port side performs data processing by referencing the historical information of the berthed ship and adopting a weighting coefficient method and configures the appropriate shore power capacity, excessive configuration is avoided, and the investment cost is reduced.

The invention provides a power supply capacity compensation method in a transformer three-phase partial discharge experiment. The method comprises the steps that the compensation reactance values of adjustable reactors L1, L2 and L3 are preset to be L11, L21 and L31; the frequency and voltage of a variable frequency power supply are adjusted; When the voltage is between 50 and 100V, the adjustable reactors and a tested transformer are in a parallel resonant state, the resonant frequencies are determined as f11, f21 and f31; according to a formula described in the description, the inlet capacitance of the tested transformer is C1, C2 and C3 respectively; when the resonant frequency is 250HZ, the compensation reactance values of the adjustable reactors are L12, L22 and L32; the compensation reactance values of the adjustable reactors are adjusted to L12, L22 and L32; the frequency of the variable frequency power supply is adjusted, and the adjustable reactors and the tested transformer are in a parallel resonant state above 250HZ; and the voltage of the variable frequency power supply is adjusted to test voltage. Power supply capacity needed by the partial discharge experiment can be reduced. The nearby power supply of the transformer can be used to carry out the experiment.

N (integer equal to or above 3) quaternary phase shift keying (QPSK) outputs having different amplitude levels, i.e., r2=r1×2−(i−1), i=2 . . . N with respect to a maximum amplitude level r1 are superposed after power amplification to form M(=22N)-valued / quadrature amplitude modulation (QAM), and N-1 outputs si except the quaternary phase shift keying QPSK-1 having the maximum amplitude r1 are subjected to power amplification in this formation, then the outputs are combined by a directional coupler to obtain a combined signal, and an output of the quaternary phase shift keying QPSK-1 and the combined signal are transmitted from two systems of antennas to be vectorially superposed and combined in a space.

This contactless electrical power supply device (1) is provided with: a securing part (2); a first moveable part (Y-axis moving element (3)) that is moveably mounted on the securing part (2); a second moveable part (component mounting head (4)) that is mounted so as to be capable of moving relative to the first moveable part (3); a first contactless electrical power supply mechanism (high-frequency electrical power source circuit (51), first electrical power supply electrode plates (52, 53), first electrical power receiving electrode plates (55, 56), first electrical power receiving circuit (57)) for supplying electrical power in a contactless manner from the securing part (2) to a first electrical load (L1) on the first moveable part (3); and a second contactless electrical power supply mechanism ((51, 52, 53, 55, 56, 57), high-frequency electrical power transmitting circuit (61), second electrical power supply electrode plates (62, 63), second electrical power receiving electrode plates (65, 66), second electrical power receiving circuit (67)) for supplying electrical power in a contactless manner from the securing part (2) via the first moveable part (3) to a second electrical load (L2) on the second moveable part (4). Consequently, contactless electrical power supply is carried out from the securing part (2) to the second electrical load (L2) on the second moveable part (4) for driving, in combination, a plurality of drive mechanisms (linear motor device (150), ball screw feed mechanism).

A PWM rectifier includes a main circuit unit which performs a power conversion on the basis of a PWM control signal, a DC voltage loop control unit which generates a current command, a current command restriction unit which sets, when an absolute value of the current command exceeds a limit value, the limit value as a final current command, and otherwise sets the current command as the final current command, a DC voltage loop saturation determination unit which determines a saturation state when the final current command is set to the limit value and otherwise determines as a non-saturation state, a DC voltage command calculation unit which changes the DC voltage command into a value obtained by adding an offset to a minimum or maximum value of the DC voltage value, and a PWM control signal generation unit which generates the PWM control signal from the final current command.

The invention provides a single-phase arc-grounding simulation device for a power distribution network. The single-phase arc-grounding simulation device comprises a 380V equivalent power distribution network, an arc current generator and a high-voltage switch, wherein the 380V equivalent power distribution network comprises a three-phase isolation transformer, a network ground capacitor and a single-phase step-up transformer; the 380V equivalent power distribution network improves a 380V power-frequency voltage to 10kV; the arc current generator generates an arc current at the 10kV voltage; the arc current generator comprises a current input terminal, a fuse and a current output terminal; one end of a secondary winding of the single-phase step-up transformer is grounded and the other end is connected with the current input terminal; the current input terminal is fixedly connected with one end of the fuse; the other end of the fuse is suspended; a distance which is about 1-3mm is kept between the fuse and the current output terminal; and the current output terminal is connected with the high-voltage switch and then is grounded. The single-phase arc-grounding simulation device can simulate an arc-grounding fault of the power distribution network under the condition of a 380V power supply, greatly reduces the power supply capacity and the equipment cost of an experiment platform and also reduces the safety risk of the experiment work.

The invention relates to the technical field of heat pumps, in particular to a heat pump system for combined supply of a kitchen dish washing machine and a dining room air conditioner. The system canprovide low-cost hot water for the kitchen dish washing machine, cold air or frozen water needed by the air conditioner is supplied to a dining room at the air conditioner season, treated exhaust airof the kitchen is utilized for being supplied to a heat pump in winter, and the energy efficiency of the heat pump is improved. According to the system, the power supply capacity of the dish washing machine is reduced by 60% or above, and the hot water heating cost is reduced by 70% or above compared with electric heating; and meanwhile, the free air conditioner can be achieved in the dining room,the kitchen exhaust air is utilized in winter for heat energy recycling, and meanwhile the energy efficiency of the heat pump is improved.

Multi-level modulation that is hardly affected by non-linear characteristics of a power amplifier and is equal to or above 64-valued quadrature amplitude modulation (64-QAM) is provided.N (integer equal to or above 3) quadri-phase shift keying (QPSK) outputs having different amplitude levels, i.e., r2=r1·2−(i−1), i=2 . . . N with respect to a maximum amplitude level r1 are superposed after power amplification to form M(=22N)−valued / quadrature amplitude modulation (QAM), and N-1 outputs si except the quadri-phase shift keying QPSK-1 having the maximum amplitude r1 are subjected to power amplification in this formation, then the outputs are combined by a directional coupler to obtain a combined signal, and an output of the quadri-phase shift keying QPSK-1 and the combined signal are transmitted from two systems of antennas to be vectorially superposed and combined in a space. A series / parallel converter is provided before each QPSK unit to divide and input input data of 2N bits, and a variable gain unit and a variable phase shifter adjust a gain and a phase.

A compact, inexpensive, large-capacity ozone generator with increased ease of apparatus maintenance. An ozone power supply includes an n-phase inverter for obtaining an AC voltage having a predetermined frequency and outputting an n-phase AC voltage waveform; n reactors and an n-phase transformer for converting an n-phase AC voltage to a high AC voltage; n high-voltage terminals for outputting the n-phase high AC voltage; and a low-voltage terminal having a common potential. Ozone generator units are electrically divided into n pieces within a discharge chamber. Each ozone generator unit includes n high-voltage electrode terminals and one low-voltage electrode terminal, common to all ozone generator units. Each ozone generator unit supports an n-phase AC discharge to generate ozone.

The invention discloses a cement plant pressure fan energy-saving control system. The cement plant pressure fan energy-saving control system comprises a fan, a universal joint coupling, a motor, a distributed control system signal converter, a PLC (programmable logic controller) and a motor driving controller, wherein the distributed control system signal converter, the PLC, the motor driving controller, the motor, the universal joint coupling and the fan are connected sequentially; and the motor driving controller comprises a first switch, a second switch, a third switch and a frequency converter, the third switch is a single-pole double-throw switch, one end of the first switch is connected with a high-voltage bus, the other end of the first switch is connected with one end of the second switch and a fixed contact of the third switch respectively, the other end of the second switch is connected with one end of the frequency converter, the other end of the frequency converter is connected with the other fixed contact of the third switch, and a moving contact of the third switch is sequentially connected with the motor, the universal joint coupling and the fan. The cement plant pressure fan energy-saving control system can achieve the stepless changing of the rotating speed of the fan, thereby adjusting the air quantity and air pressure of the fan accurately, improving the operating efficiency of the fan and reducing the energy consumption of the fan remarkably.