109 results about "High voltage" patented technology

A hybrid electric propulsion system for powering a vehicle using a natural fuel engine and an electric motor. The hybrid electric vehicle is comprised of a drive train; an electric motor for driving the drive train; an auxiliary power unit (APU); an electric energy storage system electrically coupled to the electric motor; and wherein the auxiliary power unit and the electric energy storage system provide energy for powering the vehicle. An electric bus is directly connected to both the auxiliary power unit and the electric energy source and the voltage across the electric bus is substantially the same as the voltage across the electric energy source so that a change in voltage of the electric bus results in the same change to the voltage across the electric energy source. A power management controller is programmed to control output power of the power unit to maintain the energy storage system between a predetermined high voltage set-point and a predetermined low voltage set-point.

In semiconductor devices in which both NMOS devices and PMOS devices are used to perform in different modes such as analog and digital modes, stress engineering is selectively applied to particular devices depending on their required operational modes. That is, the appropriate mechanical stress, i.e., tensile or compressive, can be applied to and/or removed from devices, i.e., NMOS and/or PMOS devices, based not only on their conductivity type, i.e., n-type or p-type, but also on their intended operational application, for example, analog/digital, low-voltage/high-voltage, high-speed/low-speed, noise-sensitive/noise-insensitive, etc. The result is that performance of individual devices is optimized based on the mode in which they operate. For example, mechanical stress can be applied to devices that operate in high-speed digital settings, while devices that operate in analog or RF signal settings, in which electrical noise such as flicker noise that may be introduced by applied stress may degrade performance, have no stress applied.

The invention relates to a ground electrode circuit grounding protective system of a high-voltage DC transmission system. The system is provided with two parallel ground electrode circuits respectively connected in series with a high-voltage DC breaker, sets an allowable range of current differences of two ground wires and an allowable range of the subtraction of the line current sum of the two ground wires from the line current difference of the two ground wires and then sequentially executes the following control program: (1), reading currents of the two ground wires; (2), judging and comparing whether an absolute value of the current difference of two ground wires is larger than the allowable range thereof, if the absolute value is not larger than the allowable range, returning to the step (1); if the absolute value is larger than the allowable range, (3) then, judging whether the subtraction of the line current sum of the two ground wires from the line current difference of the two ground wires is smaller than or equal to the allowable range; if the subtraction is smaller than or equal to the allowable range, returning to the step (1); and if the subtraction is not smaller than or equal to the allowable range, enabling the high-voltage DC breaker which is connected in series with the ground wire with larger line current to trip and terminate the program. The system can avoid the imbalance of the ground electrode circuits due to the failures of the ground electrode circuits and protects the caused DC transmission system to be closed down.

A shift register having individual driving nodes is disclosed. The shift register includes a first clock pull-down module, a second clock pull-down module, a key pull-down module, a self feedback module, and a driving output unit. The first clock pull-down module is used to pull-down the potential of a gate line to a low voltage when the first clock signal is in a high voltage level. The second clock signal pull-down module pulls down the potential of the gate line to the low voltage when the second clock signal is in a high voltage level. The key pull-down module rapidly pulls down the potential of the gate line to the low voltage level after the gate line outputs an output signal. The self feedback module is used to output a driving signal to the key pull-down module. The driving signal output unit outputs a next stage driving signal which is irrelative to the operation of the previous stage shift register.

New designs for multilayer ceramic capacitors are described with high voltage capability without the need of coating the part to resist surface arc-over. One design combines a high overlap area for higher capacitance whilst retaining a high voltage capability. A variation of this design has increased voltage capability over this design as well as another described in the prior art although overlap area and subsequently capacitance is lowered in this case. These designs are compared to the prior art in examples below.

A micro cell fuel cell using a nano porous structure according to a thin film process and an anodizing process as a template for implementing a porous structure of an electrode, its fabrication method, and a micro fuel cell stack using the same are disclosed. The micro-fuel cell includes a solid electrolyte and first and second electrodes separately formed on the electrolyte, wherein at least one of the first and second electrodes is supported by a template having a plurality of nano pores formed by depositing, anodizing and etching a thin film, and is a porous electrode with nano pores formed at positions corresponding to the entirety or a portion of the plurality of nano pores formed on the template. The micro-fuel cell can be fabricated based on the thin film process, and unit cells can be highly integrated to implement a micro-fuel cell system generating a high voltage and a high current.

The invention discloses a module combined power quality conditioning system for a tractive power supply network, which belongs to the field of power quality improvement of a tractive power supply system. A power quality conditioner (101) is connected into a secondary output terminal of a traction transformer (66) and power supply arms of the traction power supply network in parallel, the energy of the two power supply arms is stored and exchanged through an energy storage capacitor at the direct current side of a power unit, and the balance of the three-phase current at the high-voltage side of the traction transformer (66) can be realized after the system is stabilized; and the power quality conditioner (101) can synchronously compensate the harmonic wave and the reactive power for each phase under the reasonable control strategy. The provided module combined power quality conditioning system for the tractive power supply network can directly run in the network without an industrial frequency transformer and an external reactor, realizes the high-voltage high-power input and the high-voltage high-power output by using the low-voltage power device and has the advantages of small occupied area, less loss and low cost.

The invention belongs to the technical field of analogue integrated circuits and particularly relates to an error amplifier used for a switching power supply. According to the error amplifier, a circuit structure of turning-back output under-voltage protection is additionally arranged in a high-voltage clamping circuit; based on a feedback principle, the output range of the error amplifier is limited through a simulation method, and therefore a system is more stable; the situation that for a traditional structure, a long-time adjusting process is needed is avoided, and the functions of output short circuit protection and power-on stable starting are achieved. The error amplifier is especially suitable for the switching power supply.

The power supply includes parts: power end, high voltage circuit (HVC) connected to the power end, first logic control circuit in use for controlling and driving HVC, the filament circuit (FC) with its input end being connected to the power end, and second logic control circuit in use for controlling and driving FC. The method includes steps: variable frequency control is adopted in the power portion in high voltage; adjusting switching frequency adjusts the input power; using voltage feed forward ensures stable output power approximately when the voltage of input power source changes; half bridge circuit (HBC) or single tube circuit (STC) is adopted in FC; the on time of one switch tube in HBC is fixed, and the on time of the other switch tube is varied with feed back. Main circuit decides the turn off time of STC, and turn on time is controlled by feedback. Scheme of separating FC from HVC possesses high adaptability to magnetron, single tube adopted in HVC so as to lower cost.

A driving apparatus for a plasma display panel with a pulse generator to supply an alternating pulse to an electrode, and an energy recovering unit to store charges from a discharge cell when the pulse voltage decreases or to output the stored charges to the discharge cell when the pulse voltage increases. The energy recovering unit has a magnetic switch, coupled with the discharge cell and an energy storage capacitor, with variable inductance to control transient time when the pulse transitions from a first voltage to a second voltage. The transient time is based on LC resonance of the magnetic switch inductance and panel capacitance, and can be reduced to improve resolution of the panel. Insulated gate bipolar transistors can be used with the magnetic switches to reduce power loss during switching and in the on-state, and can sustain high voltages necessary for high concentration Xe discharge gas.

The invention discloses an electric power device wireless temperature measurement system, comprising a computer, a microprocessor, a wireless emission module, a wireless reception module, a data processing module, a temperature measurement terminal, an alarm module, and a monitoring management circuit; the temperature measurement terminal comprises a plurality of temperature sensors; the temperature measurement terminal is installed on the bus; a housing is installed on the outside of the temperature measurement terminal; the temperature sensor is adhered on the inner wall of the housing; the temperature measurement terminal is internally provided with a power supply module, an alarm module, a positioning module, a data processing module, and a wireless emission module; and the temperature measurement terminal is internally provide with a positioning module. The electric power device wireless temperature measurement system monitors the operation condition of the bus joint, the high voltage cable connector, the high voltage switch contact temperature through wireless transmission; the positioning module provides convenience to people to fast master the position where the temperature is abnormal, to prevention and to corrective maintenance, effectively reduces the occurrence of the faults of the high voltage power transmission and transformation, improves the instantaneity of the abnormality processing and guarantees the stable working of the high voltage electric power transmission.

The invention discloses a physical field alcoholic liquor ageing method and the device thereof. The method adopts the steps that the complete bottles of the alcoholic liquor waiting for processing are arranged in a process chamber of an ageing device, the temperature in the process chamber is adjusted, and the effect of the ageing processing is achieved through accessing electromagnetic field with a certain intensity and frequency and processing for a certain time; the device comprises a control box, a process chamber, a bottom box and an equipment casing, wherein, the control box, the process chamber and the bottom box are wrapped in the equipment casing, the control box is fixed at the top part of the device, and the process chamber and the casing are connected and fixed at the middle part of the device through insulating material; the bottom box is composed of a high voltage generator and a refrigerator, and is fixed at the bottom part of the device. The ageing method of the invention adopts the electromagnetic field ageing process combined with the alcoholic temperature control storage, the processing effect is steady, and the aging of the alcoholic liquor does not happen; the device has wide application range, is easy to be operated, is convenient and quick, has no allogenic additive substance, and meets the environmental protection requirements.

Improved multi-sectional bobbin designs described herein define a channel suitable to accommodate a portion of the wire that transits from prior winding section to the next, wherein opposing walls of the channel so defined separate the transiting portion of the wire from both prior and next winding sections through a substantial entirety of the wires descent from an upper winding layer in the prior section to a lower winding layer in the next.

The invention discloses a device and a method for measuring the concentration of <222>Rn and <220>Rn synchronously by adopting electrostatic collection and solid nuclear track. The measurement device consists of a box body, a third filter, a first aluminum diaphragm, a first solid nuclear track detector, a first filter, a second solid nuclear track detector, a second aluminum diaphragm, a second filter, a high-voltage module, a battery, a base plate and a frame-shaped seal ring. In measurement, the high-voltage module in the measurement device is started up, so that high-voltage electrostatic fields are formed between the inner surface of a first measurement cavity of the measurement device and the surface of the first solid nuclear track detector as well as between the inner surface of a second measurement cavity and the surface of the second solid nuclear track detector respectively, and then the measurement device is placed in a measurement environment to measure the concentration of <222>Rn and <220>Rn in air, and the measurement time is T. After the measurement process, the first solid nuclear track detector and the second solid nuclear track detector are taken off, and are subjected to chemical etching, and the concentration of <222>Rn and <220>Rn in the environment is obtained by calculation.

The invention discloses a high-voltage loop control device and method for an electric automobile, and belongs to the field of a new energy automobile. The control device comprises a temperature monitoring module, an electric current monitoring module and a control module. Through monitoring the real-time temperature of each of temperature monitoring points in a high-voltage loop, because when the automobile normally travels, a long-time overload current cannot occur in the high-voltage loop circuit, the temperature of each of the temperature monitoring points can be maintained within a set temperature range; when the real-time temperature of any of the temperature monitoring points is higher than the corresponding preset temperature, the situation that the current temperature monitoring point is abnormal is indicated; besides, through monitoring the electric current of a DC bus, when the real-time electric current of the DC bus exceeds a set electric current, the high-voltage loop can be damaged, so that if the output power of a power battery pack is reduced immediately or the high-voltage loop is cut off, the situation that the structure of the high-voltage loop is burn up can be avoided; and during design, a reserved design margin is reduced, and the design cost and the design difficulty are reduced.

A middle/high voltage switch cabinet temperature monitoring system based on electronic nose technology is disclosed. Gas storing and releasing devices are arranged at points where overtemperatures are easy to happen in a middle/high voltage switch cabinet; and a field detection terminal is arranged at the bottom of the middle/high voltage switch cabinet, and connected to a background server through a wireless local area network. The middle/high voltage switch cabinet temperature monitoring system is simple in structure and convenient for mounting because only the gas storing and releasing devices are needed to be arranged at the points where overtemperatures are easy to happen in the switch cabinet; and overtemperature signals are transmitted through CO2 gas so that determination is accurate and quick without causing new fault point to the switch cabinet. The system solves the problem that a contactless system is incapable of accurate positioning. Besides, the system is capable of detecting and pre-warning the overtemperature state of the contact of the switch cabinet accurately and quickly; and the system is low in cost and capable of effectively avoiding the burnout accident of the switch cabinet.

A semiconductor memory device for reading or writing data from or to a memory cell includes at least one cell array having a plurality of memory cells for outputting a stored data to one of a bit line and a bit line bar in response to inputted address and command; at least one reference cell array for outputting a reference signal to the other of the bit line and the bit line bar; a precharge block for precharging the bit line and the bit line bar as a ground; and a sense amplifying block for sensing and amplifying the data by using a core voltage for operating the semiconductor memory device and a high voltage having a higher voltage level than the core voltage.

The invention discloses a method for preparing an insulator. The method comprises the following steps of: a, preparing a three-dimensional framework which has a shape matched with that of the insulator by using a glass fiber bundle, wherein glass fiber cloth is coated on the surface of the framework and is soaked with epoxy resin; b, when the epoxy resin starts to solidify, uniformly coating resin containing ceramic powder or glass powder on the surface of the framework, and putting the framework into an insulator mold; and d, raising the temperature, sizing, solidifying and then demoulding to obtain the insulator. According to the integrated insulator prepared by the method, a process of sleeving umbrella skirts on core rods of the insulator sequentially one by one is eliminated, and labor power is saved; and the insulator prepared by the process has low dead weight, a high electrical property and a high mechanical property. Both a hollow insulator and a solid insulator which are prepared by the process have a high electrical property, a high mechanical property and low dead weight. The insulator is suitable for outdoor high-voltage power transmission lines.

The invention provides a silicon-controlled rectifier and a manufacturing method. The silicon-controlled rectifier comprises a semiconductor substrate; a first N trap, a P trap and a second N trap which are generated in the semiconductor substrate and sequentially and adjacently arranged; a first high-concentration P-type doping and a first high-concentration N-type doping which are located at theupper part of the first N trap; a second high-concentration N-type doping and a second high-concentration P-type doping which are located at the upper part of the second N trap; and a third high-concentration P-type doping which is positioned at the upper part of the P trap. The first high-concentration P-type doping and the first high-concentration N-type doping are connected to form a first device electrode; and the second high-concentration N-type doping and the second high-concentration P-type doping are connected to form a second device electrode. According to the designed and manufactured silicon-controlled rectifier, the structural characteristics of the device are symmetrically distributed, a PNPN channel can be formed when the high-voltage input and output end of positive high voltage or the high-voltage input and output end ofnegative high voltage are connected on first device pole (or the second device pole) without the conduction condition in any direction, and the bidirectional anti-static protection function of the positive high voltage and the negative high voltage can be achieved while circuit application is implemented.

The invention relates to a plane detector for a gamma ray burst imager, the detector comprising a multilayer ceramic interconnection circuit between external connectors and a processor circuit fastened on a rear face of the circuit and a detection module fastened on a front face of the circuit. The detection module includes a support having a rear face fastened to the circuit and a front face on which sensors are fastened, and a high voltage electrical connection device having a through portion passing through the support and extending between two adjacent sensors in order to connect a connection pad of the circuit to a conductive grid that extends at least in part between the sensors and that is electrically connected to a free face of each sensor.

A method for fabricating semiconductor device is disclosed. The method includes the steps of: providing a substrate having a logic region and high-voltage (HV) region; forming a first gate structure on the logic region and a second gate structure on the HV region; forming an interlayer dielectric (ILD) layer around the first gate structure and the second gate structure; forming a patterned hard mask on the HV region; and transforming the first gate structure into a metal gate.

The invention relates to a detection system for a display screen of a liquid crystal panel, which comprises a high-voltage strip, a button box, a process control system and a low-voltage differential signaling (LVDS) signal generating circuit, wherein the high-voltage provides voltage to illumine the display screen of the liquid crystal panel; the LVDS signal generating circuit generates LVDS signals to detect parameters of the display screen of the liquid crystal panel; different processes are selected by the button box, so that the LVDS signal generating circuit generates the LVDS signals in different modes; and the LVDS signals in different modes can detect different parameters of the display screen of the liquid crystal panel. The detection system has the advantages that: for a display and a projector which have large sizes, an optical probe for analyzing colors can perform multipoint simultaneous measurement, and after the optical probe is matched with a video signal figure generator for analyzing an image signal and a software operating interface, the measurement of all programming projects can be completed by quick one-button operation, so the detection system has high compatibility and stable performance; and the system has a small volume, is convenient to carry, and can be widely applied to the solution of video and color tests.

The invention discloses a parallel-electric-field electrostatic spinner, belonging to the field of electrostatic spinning. The parallel-electric-field electrostatic spinner comprises a receiver, a nozzle, a sprayer, parallel plates, a heating coil, a charging barrel, a piston shaft, an end cover, screws, a temperature sensor and a high-voltage static generator, wherein the shape of the parallel plates is identical to that of the receiver, and the parallel plates are parallel to the receiver. By using the parallel-electric-field electrostatic spinner, a uniform electric field can be formed in the spinning region, so that the dithering degree of the spun fibers in the electric field is lowered, and the falling trajectory of the spun fibers is more stable.