32results about How to "Reduce rate of ascent" patented technology

Disclosed herein is the use of chemical irritants, such as vanilloid receptor-1 agonists, in sustained / controlled release pharmaceutical preparations which also contain a drug typically having high abuse potential. Inclusion of the VR1 agonist in the pharmaceutical preparation interferes with illicit or inappropriate dosing without significantly interfering with the action of the therapeutic. Also disclosed are exemplary co-formulations of capsaicin (a VR1 agonist) and oxycodone (an opioid therapeutic having high abuse potential) in controlled release preparations.

The invention provides a current detection method based on parasitic inductance and application of the current detection method. Voltage signals on two ends of the parasitic inductance at a connecting line between a source pin of a switch tube and a power ground are detected to judge whether overcurrent occurs, an overcurrent turn-off instruction is sent through a logic control circuit, and the grid-source voltage of the switch tube is limited to protect the switch tube through a grid voltage clamp circuit when the overcurrent condition occurs. According to the method and the application thereof, a soft turn-off function is integrated, the speed for overcurrent turn-off is slowed down, the voltage spike at the turn-off moment is reduced, and the rapidity of short circuit protection of a SiC device is realized while an EMI (Electro-Magnetic Interference) problem is reduced.

The invention discloses a DC circuit breaker and a test method. The DC circuit breaker is formed by connecting two current limiting reactors in series to the two ends of four parallel branches. Of the four parallel branches, the first branch is a main branch, and is composed of a quick isolation switch K and an auxiliary quick switch T0 connected in series. The second branch is a transfer branch, and is composed of a solid state switch. The solid state switch is composed of a plurality of IGBT modules connected in series. Each IGBT module is composed of two IGBTs reversely connected in series. A diode is reversely connected in parallel to each IGBT. The third branch is a buffer circuit which is composed of a resistor and a capacitor connected in series. The fourth branch is an energy absorption circuit composed of a zinc oxide arrester. The DC circuit breaker can be quickly closed in a bidirectional manner, and has the advantages of simple structure, easy manufacture and high practicality.

A device for breaking DC currents exceeding 2500 A has a resonance circuit connected in parallel with an interrupter and a surge arrester connected in parallel with the resonance circuit. The resonance circuit has a series connection of a capacitor and an inductance. The relationship of the capacitance in μF to the inductance in μH of the resonance circuit is ≧1.

It is provided a control apparatus for a vehicle provided with an electric motor power source, an inverter, an electric motor, an inverter smoothing capacitor, and a step-variable automatic transmission, the control apparatus being configured to implement a torque reduction control, and to implement a torque reduction limitation control to limit reduction of an output torque of the electric motor to within a range in which a terminal voltage of the inverter smoothing capacitor will not exceed a predetermined withstanding voltage of the inverter and to limit the reduction of the output torque by limiting an amount of change of the output torque per unit time during the reduction of the output torque in the torque reduction control, to within a predetermined torque reduction rate limiting range, and wherein the torque reduction rate limiting range is determined upon initiation of a shifting action of the automatic transmission.

The invention discloses a small and efficient high-power solid-state modulator and belongs to the technical field of pulse power. The modulator comprises a solid-state modulator component and a pulse transformer (T), wherein the solid-state modulator component comprises a direct-current power supply (E1), an energy storage capacitor (C1) and a solid-state switch (V1). The direct-current power supply (E1) is used for charging the energy storage capacitor (C1). Output pulses of the modulator are obtained through the pulse transformer (T) after the energy storage capacitor (C1), the solid-state switch (V1) and the pulse transformer (T) form a discharge circuit. According to the small and efficient high-power solid-state modulator, the single solid-state switch is used, the equalization voltage and the connection consistency of the solid-state switch are not required to be considered, the voltage is low, insulation design can be achieved easily, the output waveform quality of the modulator is greatly improved, the circuit topological structure is simple, the size is small, the efficiency is high, modularization can be achieved easily, and the modulator is applicable to various platforms.

The present invention relates to a power circuit of displaying device, which comprises a timing controller, a control circuit, and a charge pump (single or multiple stages). The timing controller outputs a timing control signal to the control circuit. The control circuit outputs a clock signal or a capacitance adjusting signal according to the timing control signal. The charge pump receives the input voltage and outputs an output voltage according to the clock signal or the capacitance adjusting signal. The output voltage is provided to the scan driver for generating a plurality of scan driving signals. Accordingly, by increasing the rise rate of the output voltage of the charge pump in the voltage conversion time and reducing the rise rate of the output voltage close to the voltage holding time, the present invention can achieve the effect of reducing the power consumption.

Being composed of inductance, capacitance and resistance, the matching circuit through coaxial cable is connected between output end of electrical pulse source and condensive load. Characters are that the matching circuit includes resistance-capacitance (CR) branch composed of cascaded CR, an inductance branch. The inductance branch and CR branch are connected in parallel. Parameters of inductance, capacitance and resistance in the matching circuit satisfies frequency response characteristic of ratio (u2 / u1) between pulse voltage (u2) on condensive load and pulse voltage (u1) outputted from electrical pulse source. Within effective spectral range of pulse voltage (u1) outputted from electrical pulse source, frequency response characteristic is near to characteristic of distortionless system. The invention restrains oscillation of pulse voltage on condensive load as well as avoids depression of rate of rise of the pulse voltage.

The invention uses circuit theory, measurement technology, and simulation technology to design a matching circuit between pulse power and load of plasma plant. It features following point: through test, gets the voltage on load of plasma plant under the pulse voltage, current waveform and relation between voltage and current of load of plasma under the DC voltage; uses simulation technology to acquire the equivalent parameters of load of plasma plant; changes the circuit structure and simulation parameters of the matching circuit; makes the ratio (U1:U2) of the pulse voltage (U1) on load of plasma plant to the pulse voltage (U2) outputted from pulse power in effective spectral range close to the frequency response in undistorted system, and by which determines the circuit structure and the parameters.

Compositions and methods are provided for administering a pharmaceutical composition to a human patient. Compositions are administered to a human patient orally, once daily, at a therapeutically effective dose. The pharmaceutical compositions comprise a drug selected from the group consisting of brivaracetam, divalproex, lacosamide, levetiracetam, oxcarbazepine, vigabatrin, and pharmaceutically acceptable salts of any of the foregoing, and at least one excipient. At least one of said at least one excipients modifies the release of said drug to provide an extended release form. The pharmaceutical composition have pharmacokinetic properties recited in the claims.

The invention relates to a power factor correction converter based on a magnetic coupling lossless buffer circuit, comprising a rectifier bridge and a boosted circuit, wherein the boosted circuit comprises a boosted inductor with an auxiliary coupling winding and a buffer network; one end of the boosted inductor is connected with a rectifier bridge common cathode, the other end of the boosted inductor is connected with one end of the coupling winding, and the other end of the coupling winding is connected with a first diode anode; a main switch and a buffer inductor are connected among the boosted inductor, a coupling winding contact and a rectifier bridge common anode, and the buffer inductor and a main switch contact are connected with a second diode anode; a buffer capacitor and a third diode are connected among the coupling winding, a first diode contact and the rectifier bridge common anode, and the buffer capacitor and a third diode cathode contact are connected with a fourth diode anode. The invention can suppress the reverse recovery of the diodes, reduce the switching loss and improve the conversion efficiency; the auxiliary coupling winding is used for resetting the electric current of the buffer inductor; and the buffer capacitor is used for absorbing the energy reversely recovered by the diodes and transmitting the energy into an output capacitor, therefore, the lossless buffering is realized.

A power converter designed for operation at high frequencies includes a soft-switching cell comprising a split inductor, a resonant inductor, a resonant capacitor, two diodes and a controlled semiconductor. Alternatively, the power converter includes a soft-switching cell comprising a transformer having isolated windings, a resonant inductor, a resonant capacitor, two diodes and a controlled semiconductor.

The invention relates to a fast switch-based fast current-limiting circuit adopting a forced zero-cross principle. The fast current-limiting circuit comprises a system main loop, wherein an isolationswitch K1, a fast vacuum circuit breaker S1, a saturated inductor L1 and an isolation switch K2 are connected in series in sequence so as to form the system main loop, an absorption capacitor C1 and an absorption resistor R1 are connected in series so as to form a resistor-capacitor absorption circuit and then the resistor-capacitor absorption circuit is connected between fractures of the fast vacuum circuit breaker S1 in parallel, two ends of the fast vacuum circuit breaker S1 and the saturated inductor L1 are separately connected with a current-limiting reactor L3 and a zinc oxide resistor M1 in parallel, a converter capacitor C2, a converter inductor L2, a spark gap G and a high voltage fuse F1 are connected in series so as to form a forced zero-cross loop and then the forced zero-crossloop is connected between two ends of the fast vacuum circuit breaker S1 and the saturated inductor L1 in parallel, and two ends of the converter capacitor C2 are connected with an absorption resistor R2 and a transformer energy storage loop in parallel. The fast current-limiting circuit has the beneficial effects of better limiting fault current, resisting higher current impact, guaranteeing circuit security, and lowering the harm of a short circuit fault to the power system.

The invention relates to a preparation method and application of a low-activity MDI-50 product; the preparation method comprises the steps: controlling the proportion of 2,4-diphenylmethane diisocyanate and 4,4-diphenylmethane diisocyanate isomers and the content of free chlorine in an online diphenylmethane diisocyanate mixture in a rectifying tower, and enriching the free chlorine through a crystallization process; and then adding a diphenyl methane diisocyanate mixture with low impurity content and high content of 2,4-diphenyl methane diisocyanate for blending to obtain the MDI-50 product with free chlorine content of 5-20 ppm. The MDI-50 product is applied to the field of laminating adhesives, thereby being beneficial to stable control of viscosity in the application process in the field of laminating adhesives.

The invention provides a bridge arm circuit and method inhibiting a fault current of a large-capacity MMC submodule, and mainly aims at inhibition of the fault current of the large-capacity MMC submodule. In a design scheme of bridge arms of a large-capacity MMC, each bridge arm (phase unit) in the converter is designed as an integral body, and reactors are arranged in DC and AC sides of each bridge arm respectively in a manner that bridge arm reactors are dispersed. The total inductance value of the reactors in each bridge arm is kept constant, and the weight coefficients of the reactance in the AC and DC sides in the reactance of the bridge arm are checked according to system parameters. Each arm is connected to the external via the reactors in the AC and DC wire outlets. The bridge arm design scheme of the invention can be used to reduce the peak value of the fault current of the submodule and inhibit the rise rate of the fault current effectively, and further improve utilization rate of power devices in equipment, the cost of primary equipment is not increased, and the economical performance is high.

The invention discloses a direct current limiter and an application thereof. The direct current limiter comprises a current limiting unit, an energy absorption unit and a direct-current circuit breaker unit, wherein the current limiting unit is composed of a three-phase coupling reactor, a pre-charging capacitor, a smoothing reactor, a small direct-current circuit breaker and a line, and when a short-circuit fault occurs, the coupling reactor is equivalent to a large inductor to be connected into a main loop in series, and a voltage opposite to the power supply voltage is generated on the inductor to limit the fault current and reduce energy absorption of a lightning arrester; the energy absorption unit is formed by connecting a diode and a resistor in series and can inhibit stored energyof an inductive element in the line from being transmitted to the lightning arrester; the direct-current circuit breaker unit comprises a direct-current circuit breaker and a lightning arrester, the circuit breaker cuts off the fault current, and the lightning arrester absorbs energy stored by the inductor. The hybrid direct current limiter provided by the invention realizes control of the fault current, energy absorption limitation of the lightning arrester and parallel connection of capacitors to reduce the capacity, and is low in manufacturing cost.

Compositions and methods are provided for administering a pharmaceutical composition to a human patient. Compositions are administered to a human patient orally, once daily, at a therapeutically effective dose. The pharmaceutical compositions comprise a drug selected from the group consisting of brivaracetam, divalproex, lacosamide, levetiracetam, oxcarbazepine, vigabatrin, and pharmaceutically acceptable salts of any of the foregoing, and at least one excipient. At least one of said at least one excipients modifies the release of said drug to provide an extended release form. The pharmaceutical composition have pharmacokinetic properties recited in the claims.

The present invention relates to a power circuit of displaying device, which comprises a timing controller, a control circuit, and a charge pump (single or multiple stages). The timing controller outputs a timing control signal to the control circuit. The control circuit outputs a clock signal or a capacitance adjusting signal according to the timing control signal. The charge pump receives the input voltage and outputs an output voltage according to the clock signal or the capacitance adjusting signal. The output voltage is provided to the scan driver for generating a plurality of scan driving signals. Accordingly, by increasing the rise rate of the output voltage of the charge pump in the voltage conversion time and reducing the rise rate of the output voltage close to the voltage holding time, the present invention can achieve the effect of reducing the power consumption.

A system for adjusting noise includes a cell specification unit configured to specify a cell which transmits a cross talk noise to a receiver cell, a rise rate modification unit configured to slow down a rise rate of the cross talk noise, and a determination unit configured to determine a net connected to a output end of the cell as the net where the cross talk noise is reduced when the cross talk noise does not cause malfunction of the receiver cell and when a signal to be supplied to the receiver cell satisfies a timing constraint.

Provided is a toner external additive containing a base material, wherein the base material is surface-treated with an isocyanurate ring-bearing silane coupling agent, and a toner including a toner particle and a toner external additive on a surface of the toner particle, wherein the toner external additive is the aforementioned toner external additive.

The invention uses circuit theory, measurement technology, and simulation technology to design a matching circuit between pulse power and load of plasma plant. It features following point: through test, gets the voltage on load of plasma plant under the pulse voltage, current waveform and relation between voltage and current of load of plasma under the DC voltage; uses simulation technology to acquire the equivalent parameters of load of plasma plant; changes the circuit structure and simulation parameters of the matching circuit; makes the ratio (U1:U2) of the pulse voltage (U1) on load of plasma plant to the pulse voltage (U2) outputted from pulse power in effective spectral range close to the frequency response in undistorted system, and by which determines the circuit structure and the parameters.

The present invention proposes a current detection method based on parasitic inductance and its application. It determines whether there is overcurrent by detecting the voltage signal at both ends of the parasitic inductance connected between the source pin of the switch tube and the power ground, and sends an overcurrent shutdown through the logic control circuit. command, when an overcurrent condition occurs, the gate-source voltage of the switch tube is limited through the gate voltage clamp circuit to protect the switch tube. At the same time, it integrates a soft turn-off function to slow down the speed of over-current turn-off and reduce the turn-off instant. voltage spikes, while achieving fast short-circuit protection of SiC devices and reducing EMI problems.

The invention relates to a power factor correction converter based on a magnetic coupling lossless buffer circuit, comprising a rectifier bridge and a boosted circuit, wherein the boosted circuit comprises a boosted inductor with an auxiliary coupling winding and a buffer network; one end of the boosted inductor is connected with a rectifier bridge common cathode, the other end of the boosted inductor is connected with one end of the coupling winding, and the other end of the coupling winding is connected with a first diode anode; a main switch and a buffer inductor are connected among the boosted inductor, a coupling winding contact and a rectifier bridge common anode, and the buffer inductor and a main switch contact are connected with a second diode anode; a buffer capacitor and a third diode are connected among the coupling winding, a first diode contact and the rectifier bridge common anode, and the buffer capacitor and a third diode cathode contact are connected with a fourth diode anode. The invention can suppress the reverse recovery of the diodes, reduce the switching loss and improve the conversion efficiency; the auxiliary coupling winding is used for resetting the electric current of the buffer inductor; and the buffer capacitor is used for absorbing the energy reversely recovered by the diodes and transmitting the energy into an output capacitor, therefore, the lossless buffering is realized.

The invention provides a modular multilevel converter (MMC) based solid-state transformer and a control method thereof. The solid-state transformer comprises a high-voltage AC / DC converter, an isolated DC / DC converter and a low-voltage DC / AC converter, wherein the high-voltage AC / DC converter is connected with the isolated DC / DC converter through a high-voltage DC bus, and the isolated DC / DC converter is connected with the low-voltage DC / AC converter through a low-voltage DC bus parallel module. In the MMC based solid-state transformer, a medium- and low-voltage DC side adopts a DC bus staggered parallel topological structure, so that the unbalanced mutual influence of a high-voltage side system and a low-voltage side system of the solid-state transformer is solved from structure, and the power supply reliability is automatically improved; with the mutually-balanced solid-state transformer based on an MMC structure, the influence of a three-phase unbalance on a power grid and the influence of three-phase unbalance occurring in the power grid on an AC load can be prevented by controlling the constant voltage of a high-voltage common DC bus.

The invention provides a symmetrical bipolar MMC DC-side single-pole ground fault ride-through and recovery method. Through cooperation of a DC circuit breaker and a converter, DC fault current cut-off and power recovery are realized, and safe operation of the converter is protected. Through cooperation of active power and reactive power of the sound pole and the faulty pole, the active power deficiency of a converter station in the failure period is reduced. Rated reactive power is supplied to the grid, and therefore, the impact of a fault to an AC system is reduced. By actively controlling the common-mode components of the reference voltages of the upper and lower bridge arms of the converter, the risk brought to the safe operation of the system by excessive current surge stress of the converter due to reclosing failure is avoided. Based on the fact that a dual-pole short-circuit fault at the DC side of a symmetrical bipolar MMC can be regarded as a special case of single-pole ground faults of both positive and negative DC buses, the method of the invention can be used to handle a dual-pole short-circuit fault at the DC side of a symmetrical bipolar MMC.

A bridge arm circuit and method for suppressing a fault current of a large-capacity MMC sub-module, mainly aiming at suppressing the fault current of a large-capacity MMC sub-module. In the large-capacity MMC bridge arm design scheme, each bridge arm (phase unit) in the converter is designed as a whole, and the bridge arm reactor is dispersed, and the reactance is arranged on the DC side and the AC side of each bridge arm. device. The total inductance value of the reactor in each bridge arm remains unchanged, and the weight coefficient of the bridge arm reactance occupied by the AC and DC side reactance is checked according to the system parameters. Each bridge arm is connected to the outside of the bridge arm through a reactor at the AC side and at the outlet of the DC connection. Adopting the bridge arm design scheme proposed in the patent of the present invention can effectively reduce the peak value of the fault current of the sub-module and suppress the rising rate of the fault current, thereby improving the utilization rate of the power device in the equipment, and does not increase the cost of the primary equipment, and has a good economy sex.

The invention relates to a battery energy storage system which comprises a direct-current power distribution cabinet, a direct-current metering cabinet, a converter device, a storage battery cabinet and a combiner box, wherein the direct-current power distribution cabinet and the direct-current metering cabinet are arranged in a direct-current power distribution room, and the converter device is arranged at the installation position of the storage battery cabinet and the combiner box. According to the invention, the arrangement position of the converter device is adjusted; the device is arranged at the installation position of the storage battery cabinet and the combiner box, the distance between the converter device and the direct-current metering cabinet is increased; therefore, the length of a cable between the converter device and the direct-current metering cabinet is prolonged, the purpose of reducing the short-circuit current amplitude and the rise rate of the system is achieved, the effect similar to that of a series current-limiting reactor can be achieved, the design is simple, equipment does not need to be added, the occupied area of the battery energy storage system isprevented from being further increased, and the cost is saved.

The invention discloses a photovoltaic power generation optimal arrangement system, which comprises a photovoltaic module, a direct-current combiner box, a photovoltaic grid-connected DC / DC device, adirect-current metering cabinet and a direct-current power distribution cabinet, wherein the direct-current metering cabinet and the direct-current power distribution cabinet are both arranged in a direct-current power distribution room, and the photovoltaic assembly, the direct-current combiner box and the photovoltaic grid-connected DC / DC device are all arranged on the roof of the direct-currentpower distribution room; and the photovoltaic module is connected with the direct-current combiner box, the direct-current metering cabinet is connected with the direct-current power distribution cabinet through a first cable, the photovoltaic grid-connected DC / DC device is connected with the direct-current metering cabinet through a second cable, and the direct-current combiner box is connectedwith the photovoltaic grid-connected DC / DC device through a third cable. According to the invention, the amplitude and the rising rate of short-circuit current provided by the photovoltaic grid-connected DC / DC device during inter-electrode short circuit can be reduced under the condition that extra electrical equipment is not added, and the probability that the photovoltaic grid-connected DC / DC device provides extremely high short-time overcurrent is reduced.