65 results about "Anode voltage" patented technology

Disclosed herein are a method of controlling a bipolar high-voltage generator and an X-ray system. The bipolar high-voltage generator is connected to a load for supplying a cathode voltage and an anode voltage to the load. The bipolar high-voltage generator includes a first transformer and a second transformer. The first transformer is provided in an output circuit of the anode voltage, and the second transformer is provided in an output circuit of the cathode voltage. The method of controlling includes: obtaining a target voltage difference of the bipolar high-voltage generator, wherein the target voltage difference is within a preset range; and adjusting a working state of at least one of the first transformer and the second transformer based on the target voltage difference. The target voltage difference is defined as a difference between an absolute value of a target anode voltage and an absolute value of a target cathode voltage output from the bipolar high-voltage generator.

The invention discloses a thermionic cathode ionization gauge anode and cathode voltage automatic adjusting circuit, which is characterized in that a cathode stable emission control module emits electrons after a cathode reaches a red hot state, and the electrons move towards the anode under the traction of anode high voltage under a vacuum condition and flow to a cathode stable emission feedback circuit; after the first sampling voltage is compared with a preset voltage, the power of the heating cathode filament is adjusted to adjust emission electrons, and electron emission current is stabilized; and the anode voltage stabilization module adjusts the voltage output of the power supply module through the voltage division sampling circuit and compares the second sampling voltage with the standard voltage, if the anode voltage becomes large or small, the second sampling voltage is adjusted to output voltage through the voltage stabilization circuit, the output voltage is input to the high-frequency transformation primary side of the transformer, then the voltage is accompanied, a voltage loop is formed, and the anode voltage is stabilized. The circuit realizes automatic adjustment of the anode voltage and the cathode voltage of the hot cathode ionization gauge, so that the anode voltage and the cathode voltage are stable, and the vacuum test precision of the hot cathode ionization gauge is improved.

The present application relates to methods and apparatus for optimizing fast battery charging. In the described example of a method and apparatus for fast charging a battery with optimized charging, a system (400) includes a battery charger (420) for applying a voltage to a rechargeable battery (430), and a controller (422) coupled to the battery charger (420) and monitoring at least one of a battery voltage, a battery temperature, and a current flowing into the battery (430). The system (400) is configured to apply a charging current from the battery charger (420) by calculating an open circuit cell anode voltage and anode resistance of the battery (430) and determining a charging current. In an additional arrangement, lithium ion plating is prevented by the charging current.

The application relates to the technical field of electrolytic cell monitoring, in particular to a lead electrolytic cell voltage online intelligent monitoring method and system, which comprises the following steps: collecting the cell voltage, electrolyte voltage and electrolyte temperature of a lead electrolytic cell at each moment in a monitoring interval; determining the induced common-mode interference condition of the monitoring interval, obtaining the electrolysis high-temperature interference condition of the monitoring interval; combining the induced common-mode interference condition and the electrolysis high-temperature interference condition to obtain a voltage interference factor of the monitoring interval; and respectively correcting the anode voltage drop, cathode voltage drop and electrolyte voltage drop of the lead electrolytic cell to evaluate the lead electrolytic cell voltage monitoring condition. Therefore, the accuracy and reliability of the lead electrolytic cell voltage monitoring are improved.

The application belongs to the technical field of integrated circuits, and discloses a temperature-compensated configurable passive equalization circuit, a chip and a battery pack. The application comprises a reference voltage control circuit, a reference voltage generation circuit and a passive equalization control circuit. The reference voltage control circuit outputs a reference voltage control signal related to a specific temperature coefficient. The reference voltage generation circuit generates a plurality of reference voltages with specific temperature coefficients according to the reference voltage control signal. The passive equalization control circuit compares the anode voltage of each single-lead-acid battery with the corresponding reference voltage with a specific temperature coefficient in real time. When the anode voltage of the single-lead-acid battery is greater than or equal to the corresponding reference voltage with a specific temperature coefficient, a discharge path is formed in parallel to the two ends of the single-lead-acid battery. The application can solve the problem of the service life of the battery pack restricted by the consistency of each battery in the battery pack, effectively reduce the complexity and cost of the equalization management scheme of the battery pack, and adapt to changes in the ambient temperature.

A field emission cathode device includes a cathode element having a field emission surface and an adjacent gate electrode element defining a first gap therebetween. A gate voltage applied to the gate electrode element causes the field emission surface to emit electrons that are accelerated through the gate electrode element. The gate electrode element is disposed between the cathode element and an anode element, the anode element having an anode voltage applied thereto to attract the electrons emitted through the gate electrode element. A tuning electrode element is disposed between the gate electrode element and the anode element. The tuning electrode element has a tuning voltage applied thereto to decelerate the electrons directed through the gate electrode element and to direct the electrons therethrough toward the anode element. An associated method of forming a field emission cathode device is also provided.

A method for controlling a triode for alternating current (TRIAC), applied to a device, is provided. A voltage is connected to an anode of the TRIAC, and a scaled down voltage is fed into an analog-to-digital converter (ADC) pin of the device. The method includes (1) tracking the voltage at the anode of the TRIAC; (2) applying a trigger pulse to a gate of the TRIAC for a preset time based on the voltage at the anode of the TRIAC reaching a threshold; and (3) detecting whether there is a dip that corresponds to the preset time in the scaled down voltage at the ADC pin of the device. The method further includes, in response to not detecting a dip corresponding to the preset time in the scaled down voltage at the ADC pin, (4) waiting an amount of time; and (5) repeating the steps (1)-(3).

The invention provides an ignition starting method and system for an 80mN Hall electric propulsion system, and the method comprises the steps: firstly, powering on a power processing unit, and automatically carrying out the power path self-inspection; whether ignition is conducted or not is determined according to the self-inspection result, if the self-inspection result is normal, execution continues, buffer gas tank closed-loop pressure control is started, and at the moment, the control pressure is the initial pressure; starting a cathode gas path to supply gas, and heating the cathode; whether the starting mode is soft starting or hard starting is judged, if the starting mode is soft starting, cathode ignition is conducted and then anode ignition is conducted, if the starting mode is hard starting, cathode ignition and anode ignition are conducted at the same time, and low voltage is adopted for ignition during anode ignition in the two starting modes; judging whether ignition succeeds or not after anode ignition, if not, quitting the ignition process, and if yes, executing the next step; turning off a cathode heating power supply and a cathode ignition power supply; the anode voltage is gradually increased to a rated value, and the buffer gas tank pressure is gradually increased to a rated value; enabling an ignition fault monitoring program, and completing ignition starting.

The invention discloses a display module and a display control method. The display module comprises a display panel, a display driving chip and a voltage compensation circuit. Wherein the structure of the virtual light-emitting device is the same as that of the light-emitting device in the display panel, so that the virtual light-emitting device can accurately reflect the characteristics of the light-emitting device in the display panel. Therefore, after the current supply end provides the standard driving current for the anode of the virtual light-emitting device, the comparison sub-circuit can obtain the first target voltage based on the resistance value of the virtual light-emitting device corresponding to the current temperature of the display module and the standard driving current; the display driving chip performs compensation based on the first compensation signal determined by the first target voltage and the first reference voltage, so that dynamic compensation of the anode voltage of the light emitting device in the display panel can be realized, the brightness requirement in a relatively wide temperature range can be met, the actual use temperature range of the display module is improved, and the display efficiency is improved. And the compensation accuracy can be improved.

The invention discloses a stable and controllable ion source driving adaptive intelligent control system for a gas leak detector, and relates to the technical field of ion source driving, and the control system comprises a high voltage generation circuit which is used for providing a required high voltage for an anode and a suppression electrode in the gas leak detector; the cathode and anode voltage regulating circuit is used for filtering interference signals in the voltage and is also used for regulating the cathode and anode voltage through a formed negative feedback network; the filament current driving circuit is used for providing required driving current for the filament; an efficient, stable and controllable high-voltage driving mode is provided for the ion source, so that the requirements of different electrodes such as an anode and a suppression electrode for high voltage are met, meanwhile, the stability and accuracy of high-voltage output are guaranteed, and the high-voltage driving effect is achieved through cooperation with a cathode and anode voltage generation circuit and a filament current driving circuit. The problems that high voltage is difficult to obtain, the safety risk is high and the stability is insufficient in a traditional driving mode are solved, and powerful support is provided for performance improvement of the gas leak detector.

A light detection device (1) includes: a first avalanche photodiode (11A) that amplifies carriers generated by incident photons, the first avalanche photodiode being disposed in a first region (A1) of a first substrate (101) and having a first anode region (104A) to be supplied with a first anode voltage; and a second avalanche photodiode (11B) that amplifies carriers generated by incident photons, the second avalanche photodiode being disposed in a second region (A2) of the first substrate (101), which is different from the first region (A1), and having a second anode region (104B) to be supplied with a second anode voltage lower than the first anode voltage.

The invention discloses an on-resistance detection circuit and system of a gallium nitride power switch tube. The circuit comprises a voltage output circuit, a capacitor, a first voltage clamping circuit, a charging diode, a discharging diode, a voltage detector and a control unit. When the gallium nitride power switch tube is disconnected, the capacitor is charged, the capacitor is connected with the source electrode and the drain electrode of the gallium nitride power switch tube in parallel, and the first voltage clamping circuit limits the voltage between the source electrode and the drain electrode of the gallium nitride power switch tube by limiting the voltage at the two ends of the capacitor. Therefore, the voltage between the source electrode and the drain electrode is limited when the gallium nitride power switch tube is switched off. When the gallium nitride power switch tube is switched on, the anode end voltage of the discharge diode can be detected based on the voltage detector, the tube voltage drop of the discharge diode is subtracted to obtain the switch-on voltage of the gallium nitride power switch tube, and the switch-on resistance of the gallium nitride power switch tube is calculated based on the output current of the gallium nitride power switch tube. According to the scheme, the on-resistance detection precision of the gallium nitride power switch tube can be improved.

The invention relates to a method for predicting a failure of at least one component of an X-ray tube (11), in which at least one reference value of the X-ray tube (11) is stored in an evaluation device of a controller for the X-ray tube (11), wherein the X-ray tube (11) comprises a cathode (16) with a filament (18), and at least one filament current of the cathode (16), an anode current of an anode (14) of the X-ray tube (11), and / or an anode voltage are stored as a reference value, in which, during operation of the X-ray tube (11), actual values of at least the filament current, the anode current and / or the anode voltage are detected and fed to the evaluation device, in which at least one prediction for a filament failure and one prediction for a vacuum leakage at a housing (12) of the X-ray tube (11) is determined in the evaluation device at least on the basis of a comparison of the reference values and the values actually detected during operation of the X-ray tube (11) and, based thereon, at least one of the predictions for the failure of the filament (18) and the leakage of the housing (12) of the X-ray tube (11) is output.

The application relates to an electron gun cathode life prediction and stability optimization method and system, wherein the method comprises the following steps: continuously collecting basic parameters and emission parameters in the whole life cycle of an electron gun cathode, and calculating a heating power increment; based on the basic parameters, the emission parameters and the heating power increment, a health state index prediction value of the cathode is calculated, and a failure threshold is set; a residual life prediction model is constructed, the health state index prediction value is input into the residual life prediction model, the health state index curve trend is fitted, the time required for the cathode to reach the failure threshold from the current state is predicted, and the residual life is obtained; based on the health state index and the cathode working temperature, the cathode heating current and the cathode heating power are adjusted, and the cathode heating current and the anode voltage are adjusted according to the vacuum degree. The application can effectively delay the aging process of the cathode and prolong the effective service life of the cathode under the premise of ensuring the stable operation of the electron gun.

The invention relates to an electron gun cathode life prediction and stability optimization method and system, and the method comprises the steps: continuously collecting basic parameters and emission parameters in the whole life cycle of an electron gun cathode, and calculating the heating power increment; based on the basic parameters, the emission parameters and the heating power increment, a health state index prediction value of the cathode is calculated, and a failure threshold value is set; constructing a residual life prediction model, inputting the health state index prediction value into the residual life prediction model, and predicting the time required for the cathode to reach a failure threshold from the current state by fitting a health state index curve trend to obtain the residual life; and adjusting the cathode heating current and the cathode heating power based on the health state index and the cathode working temperature, and adjusting the cathode heating current and the anode voltage according to the vacuum degree. On the premise that the operation stability of the electron gun is guaranteed, the cathode aging process can be effectively delayed, and the effective service life of the electron gun is prolonged.

The invention relates to the technical field of vacuum-solid mixed digital low-light-level devices, and particularly discloses a novel digital low-light-level imaging device and a manufacturing method of the novel digital low-light-level imaging device, and the novel digital low-light-level imaging device is characterized in that a photoelectric cathode is arranged below an input window; the micro-channel plate is arranged below the photoelectric cathode; the anode assembly is arranged below the microchannel plate, the anode assembly comprises a multilayer ceramic base, a chip heat dissipation assembly, a CMOS chip, a fluorescent screen and a getter, the chip heat dissipation assembly is arranged on the multilayer ceramic base, the CMOS chip is arranged on the chip heat dissipation assembly, the fluorescent screen is arranged on the CMOS chip, the CMOS chip is used for receiving optical signals output by the fluorescent screen, and the getter is arranged on the fluorescent screen. The signal is converted into a digital signal to be output; the input window, the photoelectric cathode, the front-end tube shell and the anode assembly are packaged together from top to bottom to form a vacuum cavity; and the high-voltage power supply provides working voltage for the digital low-light imaging device and realizes self-adaptive control of the output brightness of the device along with the working illumination according to a rear-end signal, and the high-voltage power supply comprises three paths of high-voltage outputs, namely cathode voltage, micro-channel plate voltage and anode voltage.

This invention discloses a membrane electrode testing method and apparatus. The method involves cycling the membrane electrode multiple times, with each cycle including an anolyte voltage cycle durability test and a reverse polarity resistance test, thereby achieving durability testing of the anolyte catalyst layer. The anolyte voltage cycle durability test primarily addresses the impact of vehicle start-stop processes on the membrane electrode; therefore, this method considers the anolyte catalyst degradation caused by start-stop cycles. The reverse polarity resistance test corresponds to hydrogen starvation conditions. In other words, this method and apparatus simultaneously consider both anolyte reverse polarity and anolyte catalyst degradation caused by start-stop cycles, enabling rapid testing of the membrane electrode's lifespan and durability based on the start-stop and reverse polarity processes occurring on the anode side, thus improving test accuracy.

To suppress heat generation in a component due to a difference in a series resistance value of an excitation coil.SOLUTION: An excitation circuit of an electromagnetic flowmeter includes: an excitation switching circuit 1 that switches a polarity of an excitation current supplied to an excitation coil L1; diodes D1 and D2 with cathodes connected to a voltage input terminal of the excitation switching circuit 1; a DC / DC converter 2 that supplies a low voltage VexL; a constant current circuit 3 with an input terminal connected to an output terminal of the DC / DC converter 2, and an output terminal connected to an anode of the diode D1; and a switch SW5 with a first contact terminal connected to a high voltage VexH, and a second contact terminal connected to an anode of the diode D2, which turns on during a period from an excitation period start point to a rising point of the excitation current within the excitation period, and turns off during a period from the rising point to an excitation period end point. A feedback voltage to the DC / DC converter 2 is set to an anode side voltage of the diode D1.SELECTED DRAWING: Figure 1

The application discloses an S-band high-power pulsed magnetron and belongs to the field of vacuum electron devices. The device comprises an anode assembly, a cathode assembly, an input assembly, an output assembly and a permanent magnet. The application adopts an axial output structure, improves the sizes and proportions of the anode and the cathode, simultaneously increases the anode voltage, adopts the permanent magnet to provide a constant magnetic field, and can output a pulsed microwave power of more than 100kW on the basis of a small size.

The embodiment of the invention discloses an electric control system and a heating and ventilation system, and the electric control system comprises a valve drive circuit which is connected with a valve assembly and is used for driving the valve assembly to act; the control circuit is connected with the valve driving circuit and used for controlling the valve driving circuit; the output of the rectifying circuit is divided into two paths, one path of output of the rectifying circuit is connected with the valve driving circuit and the control circuit, the standby power supply circuit comprises a charging circuit, an energy storage module and a booster circuit which are connected in sequence, the control circuit is further connected with the charging circuit and the booster circuit, and the other path of output of the rectifying circuit is connected with the charging circuit. And the booster circuit is connected with the valve driving circuit and the control circuit and is used for supplying power to the valve driving circuit and the control circuit when the rectifying circuit is powered off. When the rectifying circuit is powered off, the booster circuit works, and the booster circuit can boost the anode voltage of the energy storage module and then supply power to the control circuit and the valve driving circuit.

An X-ray inspection apparatus is disclosed. The apparatus includes: an anode on which a target is disposed; the cathode is used for emitting an electron beam to a target; a gate electrode positioned between the cathode and the anode and facing the cathode side; a power supply unit for applying a voltage to each of the cathode, the gate, and the anode; and a control unit. The control unit controls the power supply unit such that a cathode voltage of a preset amplitude is applied to the cathode and an anode voltage of a preset amplitude is applied to the anode, and controls the power supply unit such that a gate voltage within a preset voltage range is selectively applied to the gate, thereby adjusting the amount of the electron beam.

The invention discloses a cathode-grid voltage calibration method for a time-broadening framing camera, and solves the problem that time resolution of the time-broadening framing camera cannot be determined along different positions of a cathode microstrip due to the lack of a cathode-grid voltage calibration method for the time-broadening framing camera adopting a transmission-type cathode. The calibration method is used for calibrating the cathode-grid voltage of the time-broadening framing camera adopting a transmission-type cathode, when pulsed light reaches the transmission-type cathode, part of light penetrates through the transmission-type cathode and directly reaches the cathode surface of a rear-end traveling wave gating framing tube to generate light current, part of light signals generate a photoelectric effect at the transmission-type cathode, and the cathode-grid voltage of the time-broadening framing camera is calibrated. Photoelectrons drifting in the magnetic drift tube are generated, and reach the cathode surface of the rear-end traveling wave gating framing tube after drifting in the magnetic field; the time difference of the cathode surface of the traveling wave gating framing tube at the rear end of the camera is broadened by using the arrival time of drifting photoelectrons and transmission light, and the microstrip voltage distribution characteristics of the cathode of the camera are obtained.

Systems, methods, and devices for unloading an access device into a storage device are provided. An exemplary structure includes a storage device with a local read line, a bleeder device coupled to the local read line, and a bleeder supply. The storage device may also include a read-line multiplexer coupled to the local read line and a global read line, as well as a read amplifier coupled to the global read line. The read amplifier may be configured to read and statically store (latch) a voltage from the global read line in response to the storage device receiving a command.The storage device may further include a plurality of access devices coupled to the local read line, a plurality of capacitors coupled to the plurality of access devices, and an anode voltage supply separate from the bleeder supply and coupled to the plurality of capacitors.

A vehicle battery monitoring system includes a drive unit including an electric motor to rotate wheels of a vehicle, at least one battery module configured to supply power to the electric motor, the at least one battery module including a cathode, an anode, and a separator between the anode and the cathode, a memory configured to store a cathode equivalent circuit model, an anode equivalent circuit model and a separator equivalent circuit model, and a vehicle control module configured to determine a cathode voltage response of the cathode using the cathode equivalent circuit model, determine an anode voltage response of the anode using the anode equivalent circuit model, determine a separator voltage response of the separator using the separator equivalent circuit model, and modify a charging current supplied to the at least one battery module based on the cathode voltage response, the anode voltage response, and the separator voltage response.

The utility model relates to the technical field of metal material protection, in particular to an impressed current cathodic protection system with independently adjustable cathode and anode voltage, which comprises a protected metal material, a chlorine evolution electrode, a voltage adjusting module and a direct current power supply, the protected metal material and the chlorine evolution electrode are respectively connected with a negative electrode and a positive electrode of a direct-current power supply and form a closed loop with a seawater medium, and the voltage regulation module is respectively connected with the protected metal material and the chlorine evolution electrode and is used for regulating potential values of the protected metal material and the chlorine evolution electrode. According to the system, the voltage of an auxiliary anode and the voltage on a protected steel and metal structure are independently adjustable in an impressed current cathodic protection system, and the auxiliary anode is replaced by a chlorine evolution anode, so that the cathode protection of the protected steel and metal structure can be realized, and meanwhile, the auxiliary anode is used for chlorine evolution so as to inhibit biological fouling.

The application provides a gyrotron fast voltage regulating method based on long pulse power forbidden zone prediction, belongs to the field of nuclear fusion plasma heating, and comprises the following steps: setting a target power, determining the adjustment range of the anode voltage of the gyrotron based on the target power; starting the gyrotron until the power of the gyrotron reaches a safe advance point, the safe advance point is located before the starting boundary of the power forbidden zone, and the anode voltage of the gyrotron is adjusted to the target voltage at one time according to the adjustment range; under the target voltage, the power of the gyrotron rapidly climbs to the target power after crossing the power forbidden zone and enters long pulse steady-state operation; and the system is also provided; the power forbidden zone and the safe advance point of long pulse operation are identified through statistical analysis, the anode voltage is adjusted at one time predictively when the starting process reaches the safe advance point, the power forbidden zone is quickly regulated after the voltage of the gyrotron is raised, and the gyrotron directly reaches the target power stable region, so that the long pulse starting success rate is significantly improved, the failure risk is reduced, and the starting time is shortened.

This invention discloses a high-voltage unit control method and system, relating to the field of anode voltage control technology. In this invention, the PSM module power supply includes a DC unit, a switch, and bypass diodes. A high-voltage unit is formed by connecting forty-five bypass diodes of the PSM module power supply in series. The operating characteristic parameters of the PSM module power supply are acquired through an analog signal acquisition module. Overcurrent and overvoltage signals from the PSM module power supply are monitored by a digital transceiver module. An FPGA module drives the PSM control module to control the PSM module power supply's on / off state based on the operating characteristic parameters and the parameters of the overcurrent or overvoltage signals. This invention improves response speed by reducing the ripple frequency of the PSM power supply.

This X-ray generation apparatus comprises: an emitter device generating an electron beam, and having an upper surface, a lower surface and a side surface; an anode terminal which is formed on the upper surface of the emitter device, and which accelerates the electron beam by means of an anode voltage so as to generate X-rays; and an electron generator module including a cathode terminal formed on the lower surface of the emitter device. The electron generator module includes: an insulating film disposed on one side and the other side of the cathode terminal; protection terminals arranged on the upper end of the insulating film; a protection resistor having one end connected to the protection terminals; and a protection grid connected to the other end of the protection resistor.

The invention provides an overvoltage protection method of a converter valve, an overvoltage protection device of the converter valve and a converter valve system. The method comprises the steps of obtaining an anode voltage of an IGCT device in the converter valve; determining whether the IGCT device loses pulses or not according to the magnitude and the duration time of the anode voltage of the IGCT device; if the IGCT device loses the pulse, reducing the initial overvoltage protection voltage of the IGCT device to the target overvoltage protection voltage, keeping the initial overvoltage protection voltage for a first preset time length, and controlling the IGCT device to be started under the condition that a preset condition is met in the first preset time length, so as to avoid a fault of the lightning arrester; the preset condition is that the anode voltage of the IGCT device is greater than or equal to the target overvoltage protection voltage. According to the method, the pulse loss judgment of the IGCT device can be completed through the abnormal through-current / abnormal voltage, and after the pulse loss is judged, the forward overvoltage protection threshold of the IGCT with the abnormal opening is switched to be the secondary overvoltage protection threshold, so that the through-current of the lightning arrester can be avoided.

The application relates to a low-power LIGBT device integrated with a self-bias PMOS, and belongs to the technical field of semiconductors. The device comprises a substrate, a buried oxygen layer, a drift region, a P-type buried layer, a common MOS region, a self-bias PMOS region and an anode region. The substrate, the buried oxygen layer and the drift region are sequentially arranged from bottom to top, and the P-type buried layer is arranged in the drift region and is completely wrapped by the drift region. The common MOS region is adjacent to the self-bias PMOS region, and the anode region is located at the upper right side of the device. The self-bias PMOS region can reduce the saturation current of the device when the anode voltage is increased, reduce the off-state loss of the device when the device is turned off, and improve the short-circuit working characteristics of the device when the device is in short-circuit working.