307results about How to "Fast shutdown" patented technology

A method and apparatus is presented that allows rapid switching between multiple operating system environments on a single computer, through the use of a Super Operating System operating between the computer system's firmware level and a plurality of bootable operating systems and applications. Relevant data, such as hardware controls, bootable operating systems, and applications software, are grouped onto physical partitions in physical memory. Combinations of compatible partitions can be assigned to a cabinet to create a virtual computer system. A given partition is assignable to multiple cabinets. By operating above the virtual computer systems, the Super Operating System uses the suspend and resume functions of the power management support functions to suspend and hybernate one operating virtual computer system, while activating and operating an alternate virtual computer system on the same computer.

The invention discloses a method for start-up and shutdown and a computer. By using a characteristic that a non-volatile memory is capable of storing data for a long time and fast reading and writing data under the condition of no power supply, during the shutdown of the computer, a register status value of a chip set controller, a register status value of an input / output (I / O) interface and valid data in a memory are fast written into the non-volatile memory to realize fast shutdown; and during the start-up, the register status value of the chip set controller, the register status value of the I / O interface and the valid data in the memory at the shutdown time of the computer can be fast read from the non-volatile memory to realize fast recovery of an operating system. The method for start-up and shutdown not only can realize fast start-up and shutdown of the computer, but also does not have the problem of data loss due to the off of the power supply.

The invention discloses an isolated rapid turn-off metal oxide field effect transistor (MOFET) driving circuit, which comprises a totem-pole output circuit, a transformer T, a negative voltage generation circuit and an MOSFET, wherein an output point of the totem-pole output circuit is connected with the primary dotted terminal of the transformer T through the anode of a blocking capacitor C1; the secondary dotted terminal of the transformer T is sequentially connected in series with a secondary capacitor C2, a diode D4, an electrolytic capacitor C3, a resistor R1 and the MOSFET, and then is connected to the secondary unlike terminal of the transformer T; a voltage stabilizing diode D3 is connected to the two ends of the secondary side of the transformer T; the base of a triode Tr3 is connected with the anode of the secondary capacitor C2, the collector of the triode Tr3 is connected with the cathode of the diode D4, and the emitter of the triode Tr3 is connected with the secondary unlike terminal of the transformer T; a diode D6 is reversely connected in parallel with the two ends of the gate input resistor R1; a voltage stabilizing diode D5 is connected in parallel with the two ends of the electrolytic capacitor C3; and a resistor R2 is connected between the gate and source of the MOSFET. The circuit is applied to places with high requirements on the anti-interference capability of the driving circuit and on rapid turn-off and with large duty ratio variation ranges.

The invention discloses a one-way isolated type metal-oxide-semiconductor filed-effect transistor (MOSFET) drive circuit. The one-way isolated type MOSFET drive circuit comprises a level transformation and pulse drive circuit, a pulse transformer, a magnetic reset circuit and an acceleration turn-off circuit. The level transformation and pulse drive circuit is used for level transformation and power amplification on input pulse signals so as to drive the pulse transformer to work. The magnetic reset circuit is used for enabling the pulse transformer to carry out reliable magnetic reset. The acceleration turn-off circuit is used for accelerating turn-on and turn-off of a MOSFET tube, and comprises a capacitor, a second resistor, a third resistor and a PNP type triode. One end of the capacitor is connected with an auxiliary edge synonym end of the pulse transformer, the other end of the capacitor is connected with the second resistor, and the other end of the second resistor is connected with a grid electrode of the MOSFET tube. The third resistor is connected with the capacitor in parallel, a collector electrode of the PNP type triode is connected with an auxiliary edge non-synonym end of the pulse transformer, a base electrode of the PNP type triode and the capacitor are connected with one end of the second resistor, and an emitting electrode of the PNP type triode is connected with the grid electrode of the MOSFET tube.

The invention discloses an engine exhaust gas waste heat recovery and control system and method based on organic rankine cycle, and belongs to the field of energy conservation and emission reduction. In the invention, a waste heat recovery system comprises engine cycle, organic rankine cycle, cooling water cycle and lubrication oil cycle which are coupled together; by means of reasonable control, the system can be convenient to start, stable to operate and rapid to stop according to the operation of the engine under different working conditions; in case of a system failure, the system can be emergently braked; and under the condition of no influence on the normal operation of the engine, the optimal performances of the system can be obtained finally, and the utilization ratio of the engine exhaust gas waste heat is improved greatly, thus thermal pollution of the engine exhaust gas to the environment is improved.

Disclosed is a porous film formed of a polyolefin resin comprising an ethylene-α-olefin copolymer (A) which comprises structural units originating from ethylene and structural units originating from one or more sorts of monomers selected from α-olefins having 4-8 carbon atoms and which satisfies the requirements (I) the intrinsic viscosity [η] is 9.0 to 15.0 dl / g; (II) the melting point Tm is not lower than 115° C. but lower than 130° C.; (III) the content of cold-xylene-soluble components included in the ethylene-α-olefin copolymer (A) is 3% by weight or less; and (IV) Tm≦0.54×[η]+114. A battery separator including the porous film and a method for the preparation of the porous film are also disclosed.

The invention provides a blowing-out descending stockline control method for a blast furnace, which comprises the following steps: according to the time order, dividing the blowing-out process of a blast furnace into an ore reduction process, a coke excess process and an aerated oxygen excess process; measuring or calculating the real-time position of a stockline; and for the different positions of the stockline in different processes, adopting different blast volumes and different amounts of roof sprayed water in the blast furnace, and scheduling corresponding operations at appropriate tapping times to realize the blowing-out descending stockline operation of the blast furnace. The blowing-out descending stockline control method for a blast furnace can realize safe and fast blowing-out operation.

A power supply controller is provided for providing a drive current to a control terminal of a power transistor in three time intervals. The controller includes control circuits configured to control the drive current in multiple stages. During a first time interval, first drive current includes a current spike for turning on the power transistor in response to a start of the control signal pulse. During a second time interval, a second drive current includes a ramping current substantially proportional to a magnitude of a current through the power transistor. During a third time interval, current flow to the power transistor is at least partially turned off before an end of the control signal pulse.

A manual controller operates through a wireless communication link with a computing device to manipulate images or symbols on a display associated with the computing device. An electrical power conserving system allows such a wireless controller to conserve electrical power as the controller operates with electrical power supplied by replaceable batteries or rechargeable battery packs. In preferred embodiments, electronic manual-contact sensing circuitry enables more rapid turnoff of the controller during periods of game play inactivity. This eliminates a long timeout period and allows electrical current drain only when the controller is actually being held by a user. Preferred embodiments of the electronic manual-contact sensing circuitry detect electrical resistance of a user's hands and thereby enables delivery of different amounts of electrical power as required.

The invention relates to a rapid fusing device, a rapid fusing control method, a DC circuit breaker and a control method thereof. The rapid fusing device comprises a fuse installation branch used for installing a fuse, wherein the fuse installation branch is used for being serially arranged in a circuit. The rapid fusing device further comprises a fusing current generation unit, wherein two ends of the fusing current generation unit are connected to two ends of the installation branch in parallel. The rapid fusing device also comprises a main control unit, wherein the main control unit controls the fusing current generation unit to generate fusing current, and the main control unit controls the fusing current generation unit to generate fusing current flowing through the fuse installation branch when the circuit is required to be cut off rapidly so as to enable the fuse to be rapidly blown. The rapid fusing device is applied to a DC circuit breaker, and can realize rapid fault isolation through controlling active blowing of the fuse.

The invention relates to a hybrid energy storage topological structure on the basis of an MMC (modular multilevel converter). The structure comprises a positive bridge arm and a negative bridge arm; the positive bridge arm is formed by sequentially connecting power conversion subunits 1 to n in series; one end of the positive bridge arm is connected with a high-voltage DC (Direct Current) positive bus bar and the other end of the positive bridge arm is connected to a high-voltage three-phase AC (Alternating Current) power grid by a current limiting reactor; the negative bridge arm is formed by sequentially connecting power conversion subunits n+1 to 2n in series; one end of the negative bridge arm is connected with a high-voltage DC negative bus bar and the other end of the negative bridge arm is connected to the high-voltage three-phase AC power grid by a current limiting reactor; each functional conversion subunit is formed by connecting a power conversion module, a potential isolation module and an energy storage module in series. According to the invention, various energy storage bodies are flexibly switched into a power system and an energy storage function and a service which are uninterrupted, high in quality, flexible to control and safe to operate are provided for the power system.

The invention relates to a device and method for verifying the authenticity of banknotes. The inventive device comprises a light source for emitting light, which is provided for exciting fluorescent light in a banknote to be verified, and comprises a fluorescence detector for detecting the fluorescent light emitted by the banknote to be verified. According to the invention, the light source is a light-emitting diode and the light-emitting diode is designed for emitting light, which contains ultraviolet light at least in one spectral partial range. This enables the device to be provided with a compact design. According to the inventive method, fluorescent light is excited and detected in the banknote to be verified, and the detected fluorescent light is compared with a predefined threshold value. The invention provides that the detected fluorescent light is diminished by the ambient light detected when the light source is switched off. This results in the elimination of measuring inaccuracies while enabling a simple operation.

The invention relates to a self-turnoff component driving protection circuit which particularly comprises positive and negative power supplies, an optical coupler isolating circuit, a control circuit, an anti-saturation circuit, a high power transistor and a composite buffer circuit, wherein a control signal current is subjected to resistance-capacitance filtering and is subsequently input into the anode of a primary light emitting diode of the optical coupler component; an emitter electrode of a secondary phototriode of the optical coupler component is directly connected with the input end of a chip UAA4002 in the control circuit; the positive power supply is connected with the collector electrode of the phototriode through a switch; the positive and negative power supplies are respectively connected with positive and negative power supply pins of the chip UAA4002 and are respectively connected with the collector electrodes of subsequent upper and lower pair tubes, the control circuit is connected with the anti-saturation circuit through a current-limiting resistor; the anti-saturation circuit is connected in parallel between the base electrode and the collector electrode of the high power transistor; and the composite buffer circuit is directly connected in parallel between the collector electrode and the emitter electrode of the high power transistor; thereby a self-turnoff component driving protection circuit which is simple in circuit structure, complete in function, high in reliability, small in switch consumption and rapid in protection response is provided.

The invention provides a low cost industry inverter system based on a TMS320F28015PZA DSP from Texas Instrument, namely, use one main control chip DSP to control two three-phase asynchronous motors at the same time. One TMS320F28015PZA DSP main control chip cooperated by the surrounding hardware circuit is used to generate 12 channels of PWM (Pulse Width Modulation) wave which can control 12 IGBT tubes, thus the circuit can generate two three-phase electric signal outputs. The low cost industry inverter system of the invention aims to use one inverter to control two three-phase asynchronous motors at the same time, thereby saving one DSP main control chip, reducing the equipment volume and effectively reducing the cost; meanwhile, the low cost industry inverter system of the invention greatly increases the reliability and stability of the control system.

The invention provides a thermally-controlled superconducting switch, comprising a switch skeleton (1), superconducting coils (2), heaters (3) and an insulating layer (4); the superconducting switch skeleton (1) is made of insulating materials with poor heat conduction; the superconducting coils (2) are formed by winding superconducting lines with high resistivity in a nonconductive mode; the heater (3) comprises a dentoid stainless steel sheet and a polyimide film; the superconducting coils (2) and the heaters (3) are arranged at intervals; the heaters (3) are adhered to internal and external surfaces of each layer of superconducting coils (2); and the insulating layer (4) is arranged on the outer side of the heater (3) in the outermost layer. The superconducting switch is simple and easy to manufacture, has the advantages of high heating efficiency and the like, and is uniform and rapid in heating.

This invention discloses one TOKMAK discharging clutter power mode control method, which controls low clutter front degree of power through computer to control klystron output to realize needed microwave power mode. The incidence power and reflection power microwave signal and plasma current signal Ip and transducer flux consumption signals Def control the output level of Do according to needs of control modes to control DC blocking drive circuit and to control each sub circuit PIN switch to realize clutter power output in different modes.

The invention discloses an electromagnetic pilot pneumatic-control two-position three-way valve. The valve comprises a secondary valve, an air cylinder (7) and a main valve, wherein the secondary valve is a two-position three-way electromagnetic valve and comprises a secondary valve body, a secondary valve seat (8), a secondary valve core (9), an electromagnetic component (11) and a secondary valve spring (10), wherein the secondary valve spring (10), the secondary valve core (9) and the secondary valve seat (8) are sequentially arranged from top to bottom in the secondary valve body; the secondary valve spring (10) is in a compression state; one end of the air cylinder (7) is an air inlet (16); the main valve is a two-position three-way valve and comprises a main valve body (3), a main valve rod and a chamber, wherein the main valve rod and the chamber are arranged in the main valve body; a piston (31), an exhausting valve core (5) and a main valve core (5) sequentially sleeves from right to left on the main valve rod; the piston can perform reciprocating motion in the chamber. The electromagnetic pilot pneumatic-control two-position three-way valve disclosed by the invention has the advantages of high pressure, large flow rate, small size, rapid response and the like, and has the effects of realizing rapid start and stop of an engine and reducing the after-working impulse of the engine when the engine is shut down.

A method for de-energizing a chain-link converter including one or more phase legs each phase leg having a number of series-connected converter cells. The phase legs are connected to a respective charging resistor. The method includes the steps of: opening AC circuit breakers arranged between a power grid and the chain-link converter, opening charging resistors switches arranged in parallel with a respective one of charging resistors, and circulating a current within the chain-link converter through the charging resistors and each phase leg, whereby the DC capacitor are discharged. The invention also relates to a controller, computer program and computer program products.

The invention discloses a solid-state relay which comprises a light-emitting element, a photovoltaic diode array, one or two normally open metallic oxide field effect transistors which are arranged between output terminals of the relay, an accelerated charging circuit formed by photoelectric triodes, and an accelerated leakage circuit formed by two PNP triodes, an NPN triode and a photoelectric triode. The solid-state relay can be realized in a way that the output metallic oxide field effect transistor gate capacitance is charged and discharged, the purpose of fast connection and disconnection on the relay can be achieved by using the circuit structure, the photoelectric triodes are led, the circuit is at a state of illumination when the output metallic oxide field effect transistor gate capacitance is charged, and the photoelectric triodes of the accelerated charging circuit are at a state of low resistivity. The relay is simple in structure, and improves the anti-interference capability when the connection time is not added.

The invention discloses an individual pitch-changing control optimization method for a large-scale wind generating set. The method comprises the following steps that 1), whether the wind generating set shuts down or not is judged; 2), if wind is relatively small and an individual pitch-changing control function of the large-scale wind turbine generator is not started, a collaborative pitch-changing control method is adopted, and three blades are feathered to 90 degrees at a fixed speed; 3), if the wind is relatively large and the wind turbine generator is in the individual pitch-changing control mode, when a shutdown command is received, a collaborative pitch-changing control ring outputs a desired pitch angle beta c; 4), a deviation control ring judges the control mode according to the rotating speed of an electric generator of the wind turbine generator; 5), if the rotating speed of the electric generator is greater than the rotating speed of grid connection, the deviation pitch-changing control ring keeps normal output; 6), otherwise, the deviation pitch-changing control ring gradually exits, and an amplitude limiting ring is used for implementation; 7), collaborative pitch-changing control and deviation pitch-changing control are simultaneously started; and 8), if the pitches of the three blades are changed to 90 degrees, shutdown is finished. According to the method, unbalanced loading of the wind generating set can be reduced in the whole shutdown process.

The invention discloses an overcurrent protection detection circuit applied to high-power motor drive chips. The overcurrent protection detection circuit comprises an MOSFET (metal-oxide-semiconductor field-effect transistor) MI, a current sampling tube MII, a voltage comparator VC, an MOS (metal oxide semiconductor) tube M6 and a current comparator IC. Source electrodes of the MOSFET MI and the current sampling tube MII are connected with motor current voltage VBB. Grid electrodes of the MOSFET MI and the current sampling tube MII are connected. Drain electrodes of the MOSFET MI and the current sampling tube MII are connected with two input ends of the voltage comparator VC respectively. The output end of the voltage comparator VC is connected with the input end of the current comparator IC, and sampling current is compared with reference current Iref in the current comparator IC. According to comparison results, protection to maximum-peak output current in a motor current charging mode is performed.

The invention discloses an electromagnetic drive adhesive dispensing valve comprising a flexible amplification arm. The electromagnetic drive adhesive dispensing valve comprising the flexible amplification arm comprises an adhesive cavity (16), a nozzle (18) and an ejecting needle (13), the adhesive cavity (16), the nozzle (18) and the ejecting needle (13) are installed at one end of a support (1), one end of the flexible amplification arm (3) is installed at the other end of the support (1), the other end of the flexible amplification arm (3) is in transmission connection with the ejecting needle (13), a supporting horizontal plate (9) is arranged on the support (1), a regulating screw (8) is arranged on the supporting horizontal plate (9), a compression spring (11) is arranged between the ejecting needle (13) and the regulating screw (8), an armature (12) is installed on the flexible amplification arm (3), and an electric magnet acting on the armature (12) is installed on the support (1). The electromagnetic drive adhesive dispensing valve comprising the flexible amplification arm is rapid in response, simple in structure, large in sprayable adhesive viscosity and adjustable in spraying speed and adhesive spraying amount.

The invention discloses an electromagnetic valve driving circuit of an electronic unit pump and a control method thereof, and belongs to the technical field of engine electronic control. The driving circuit comprises a power source, a DC / DC boosting module, a MOS tube QA, a high-end driving chip, a diode DA, a MOS tube QB, a low-end driving chip, an electromagnetic valve, a diode DB, a hall current sensor and a single chip; the MOS tube QA is controlled under a high-end control signal output by the PWM module of the single chip, and matched with a current feedback signal output by the single chip PWM module, so as to modulate the circuit driving voltage; the MOS tube QB is controlled by a low-end control signal output by the single chip PWM module, so as to control the circuit on-off, set up a follow current loop and realize rapid flow discharge. The driving circuit applies the hall current sensor, and has the advantages of few response times, small temperature drift, good output linearity and high durability, and others; the driving circuit matched control method can reduce the on-off frequency of the MOS tube QA, and reduce the circuit working noise.

The invention discloses a method for prolonging the coal gas recovery time in the blast furnace stockline-descending blowing-out process. The method specifically comprises the following steps that (1)a blast furnace top atomization water pumping system is installed before a furnace is blown out, and the furnace is normally used; (2) on the day before the furnace is blown out, the components of slag iron and the temperature of molten iron are adjusted; (3) blowing-out materials are added, wherein the blowing-out materials refer to a two-section structure + cover surface coke; (4) pre-damping down is carried out; and (5) operations of wind supply, water pumping and descending a stockline are carried out so as to meet the condition of prolonging the time for recovering coal gas and continueto recover the coal gas. The method is simple and easy to implement, the recovery of the coal gas is not stopped unit the stockline is descended to a lower level (the middle lower part of the furnacebosh), the coal gas recovery time is prolonged, so that the pollution to the atmosphere caused by the diffusion of the blast furnace coal gas is reduced, meanwhile, the blowing-out process can be safely accelerated, and the time is saved for minor repair, medium repair and heavy repair of the blast furnace.

The invention relates to a high-voltage and medium-frequency power supply for an electrostatic dust collector, which comprises a rectification unit, an inverter, a high-voltage rectification transformer and a controller, wherein the rectification unit is used for rectifying inputted three-phase 380V alternating current with a power frequency of 50Hz into direct current and then filtering and outputting the direct current; the inverter is used for inverting the filtered direct current to two-phase medium-frequency alternating current; the high-voltage rectification transformer is used for boosting and rectifying the two-phase medium-frequency alternating current and then supplying power to the electrostatic dust collector; and the controller is used for controlling the frequency of the medium-frequency alternating current inverted by the inverter. The high-voltage and medium-frequency power supply solves the technical problems of slow response time and low dust-collecting efficiency when the electrostatic dust collector in the prior art is in low-frequency (power-frequency), and the technical problems of high cost, immature process of high-power equipment and resource waste caused by replacing relevant equipment when the power supply is used for reforming the old dust collector when the electrostatic dust collector in the prior art is in high-frequency, and is a high-voltage and medium-frequency power supply for the electrostatic dust collector, which uses a medium-frequency power supply for supplying the power, improves response time and dust-collecting efficiency and has no need of replacing the equipment.

The invention provides a dynamic power flow control device of a controllable transformer. The dynamic power flow control device is composed of the controllable transformer, a power unit, a measurement and control module, a bypass switch, an input voltage transformer, an output voltage transformer and an output current transformer. The dynamic power flow control method comprises the following steps of: controlling the ON and OFF of a subconnector at an input side (original edge) of the controllable transformer by using a quickly powered-on / off electronic power switch; injecting a duple-frequency signal in a pulse-width modulation signal of the electronic power switch of the controllable transformer by using a DC (Direct Current) signal; and changing the phase position and the amplitude of output voltage of the controllable transformer through changing the amplitude of the DC signal in the pulse-width modulation signal as well as the amplitude and the initial phase position of the duple-frequency signal so as to realize the adjustment of active power and reactive power. In the invention, as the conduction of the subconnector of the controllable transformer is controlled, the dynamicpower flow of a power network is adjusted and controlled; and the dynamic power flow control device has the characteristics of low cost and high reliability for the control of dynamic power flow.

The invention discloses a braking method of a permanent-magnet synchronous motor. The method applied to an electronic speed regulator comprises: a brake control signal for indicating an electronic speed regulator to brake a permanent-magnet synchronous motor is received; a first brake signal is generated, wherein the first brake signal is used for indicating the permanent-magnet synchronous motor to reduce the rotational speed within preset braking time; the first brake signal is transmitted to the permanent-magnet synchronous motor; a second brake signal for instructing the permanent-magnet synchronous motor to stop rotation is generated when the preset braking time is completed; and the second brake signal is sent to the permanent-magnet synchronous motor. According to the synchronous braking unmanned aerial vehicle and the braking method thereof and the permanent-magnet synchronous motor assembly for realizing the same, the braking is divided into two stages; and when the motor rotation speed is reduced to be in a set range, a braking force for synchronous shutdown is applied again, so that rapid and consistent shutdown of multiple motors of the unmanned aerial vehicle can be realized.

The invention discloses a photovoltaic power generation system and a turn-off device. The photovoltaic power generation system comprises a photovoltaic array, a photovoltaic inverter, and a turn-off device electrically connected between the photovoltaic array and the photovoltaic inverter. When the photovoltaic inverter is closed or fails, the photovoltaic inverter generates a first control signal. The turn-off device receives the first control signal to disconnect the photovoltaic array and the photovoltaic inverter. The photovoltaic power generation system of the invention is of high security and reliability.

A synchronous rectifier driver pre-positions a gate of a synchronous rectifier to allow for fast turn-off. The synchronous rectifier driver turns ON the synchronous rectifier by driving the gate at a high level for a period of time that is based on a previous conduction time of the synchronous rectifier. The synchronous rectifier driver thereafter drives the gate at a lower level that is sufficient to keep the synchronous rectifier ON. The synchronous rectifier can be quickly turned OFF by further reducing the level of the drive signal at the gate of the synchronous rectifier.

The invention discloses a semiconductor device test system and a test method thereof. The test system comprises an upper computer, an oscilloscope, a main control system PLC, a circuit control moduleand a test box body. An automatic tool is arranged in the test box body, a tested piece is placed on the automatic tool, and a test fixture is arranged right above the tested piece. The automatic toolcomprises a driving device, the driving device drives the automatic tool to move so as to drive the tested piece to be connected with the test fixture, and the main control system PLC is connected with the test box body, the test fixture, a main circuit unit and a gate pole driving unit. The upper computer is connected with the oscilloscope, and the oscilloscope is connected with the test box body. The advantages of the present invention are that the semiconductor device test system with a specific testing circuit and a testing system structure is designed, the theory is combined with the practice, and all devices in the system are matched with one another to test the semiconductor device.