3411 results about "High voltage source" patented technology

The invention discloses a two-bed duplex tube medical diagnosis X-ray high frequency high voltage generator, which comprises a power supply and a central control unit, and also comprises a high frequency inverter circuit, a pulse-width modulation drive circuit and a high voltage commutation circuit. The generator converts the industrial power supply into two way high frequency high voltage, and then obtains positive end DC high voltage and negative end DC high voltage after the rectification and the filter to supply an X-ray pipet for working. Because the frequency is high and the high voltage ripple after the rectification and the filter is minimum, causing the X-ray pipet of a radiographic table and the X-ray pipet of an electric perspective table to work in turn under the condition of arranging only one set of high voltage supply. The equipment investment is saved, and the work of using the X-ray diagnosis for the medical staff is convenient. Being served as the high voltage supply, the invention is also suitable for the safety detection fields such as the industrial fault detection, the civil aviation, the station, the custom, etc., and supplies the stable high quality high voltage for the equipment.

The invention discloses a medical diagnosis X-ray high frequency high pressure generator, comprising a power supply, a central control unit, a high frequency inverter circuit, a pulse width modulation driving circuit and a high pressure transform and high pressure output circuit. The generator transforms the industrial power to two ways of high frequency and high pressure, a positive direct current high pressure and a negative direct current high pressure are obtained through rectifying and wave-filtering to provide an X-ray ball tube to work. As the frequency is high, the ripple of the rectified and wave-filtered high electric pressure is tiny, and the X-ray quality projected by the X-ray ball tube is high, and the clearance of photos of the perspective and photograph is also high. The X-ray ball tube of a photograph bed or the X-ray ball tube of an electric perspective bed can work if allocated with the high pressure power. The invention is convenient for the medical staff to use the X-ray to do the work of diagnosing diseases. As the high pressure power supply, the invention is also suitable in the safety inspection fields such as industrial flaw detection, civil aviation, station and customs etc, and provides a stable and high qualified high pressure power supply for the equipments.

DC input energy is converted into DC output voltage by the use of a switched current mode high-voltage power supply. Pulses of input current are switched through a conversion transformer and the energy content of each pulse is converted into the DC output voltage. The time widths of the input current pulses are regulated relative to the DC input and output voltages, the magnitude of the current within each input current pulse, and in relation to maintaining a plurality of different selected operational conditions. The rate at which the input current pulses are converted is changed relative to the level of the DC output voltage.

Device for generating a plasma discharge for patterning the surface of a substrate, comprising a first electrode having a first discharge portion and a second electrode having a second discharge portion, a high voltage source for generating a high voltage difference between the first and the second electrode, and positioning means for positioning the first electrode with respect to the substrate, wherein the positioning means are arranged for selectively positioning the first electrode with respect to the second electrode in a first position in which a distance between the first discharge portion and the second discharge portion is sufficiently small to support the plasma discharge at the high voltage difference, and in a second position in which the distance between the first discharge portion and the second discharge portion is sufficiently large to prevent plasma discharge at the high voltage difference.

Electrical circuit componentry is switchable into a defibrillator circuit to deliver a constant pacing current to a patient. The circuitry may include a constant current source inserted in a leg of the defibrillator circuit or a resistor of selected value inserted between a high voltage source and the high side of a defibrillator circuit.

The present invention relates to a device for simultaneously treating a tumor or cancerous growth with both hyperthermia and X-ray radiation using brachytherapy. The device includes a needle-like introducer serving as a microwave antenna. Microwaves are emitted from the introducer to increase the temperature of cancerous body tissue. The introducer is an inner conductor of a coaxial cable. The introducer contains a hollow core which houses an X-ray emitter. The X-ray emitter is connected to a high voltage miniature cable which extends from the X-ray emitter to a high voltage power source. The X-ray emitter emits ionizing radiation to irradiate cancerous tissue. A cooling system is included to control the temperature of the introducer. Temperature sensors placed around the periphery of the tumor monitor the temperature of the treated tissue.

In-system repairing or configuring faulty memories after being used in a system are disclosed. In one embodiment, a memory chip can include at least one OTP memory to store defective addresses that are to be repaired. Advantageously, the OTP memory can operate without requiring additional I / O pins or high voltage supplies for reading or programming. The memory chip can also include control logic to control reading or programming of the OTP memory as needed.

A system for connecting an electric vehicle to a high voltage power source. The system including an electric vehicle supply equipment (EVSE) having an electrical plug compatible with a high voltage power outlet, the plug connected to a power cord. The power cord is connected to a housing containing a number of electrical components configured to control the power flow to an electric vehicle to recharge the vehicle's batteries. The power cord extends from the housing and is connected to a standard electric vehicle connector compatible with battery electric vehicles (BEV) and plug-in hybrid electric vehicles (PHEV). The EVSE further includes safety measures, such as a relay that controls the flow of power to the vehicle connector and a ground fault interrupter, to protect users from high voltage electric shocks.

A circuit for discharging stored energy in an electrosurgical generator is disclosed. The circuit includes a pulse width modulator for controlling a high voltage power supply, an error signal generating circuit configured for delivering an error signal as a difference between an output signal voltage with a feedback voltage generated by the high voltage power supply. The error signal is transmitted to the pulse width modulator. The circuit further includes a switching circuit configured to switch in a load in parallel with an output of the high voltage power supply when the error signal is lesser than a first predetermined threshold to discharge the output.

The present invention is directed to a device (1;1';1''; 1'''; 1''''; 1''''') for air cleaning, especially from electrically charged particles, the device (1;1';1''; 1'''; 1''''; 1''''') including an air flow channel (2;2';2''; 2'''; 2''''; 2'''''), an air transporting mechanical fan (3;3';3''; 3'''; 3''''; 3'''''), a precipitator (4;4';4''; 4'''; 4''''; 4'''''), a high voltage source (5;5';5''; 5'''; 5''''; 5'''''), the precipitator (4;4';4''; 4'''; 4''''; 4''''') including two band-like electrode elements that are wound several times around an axis or bobbin body (7;7';7''; 7'''; 7''''; 7'''''), a gap distance being present between adjacent electrode elements, respective electrode elements being electrically connected with each terminal of the high voltage source (5;5';5''; 5'''; 5''''; 5'''''), characterized in that the precipitator (4;4';4''; 4'''; 4''''; 4''''') is arranged downstream of the fan (3;3';3''; 3'''; 3''''; 3''''').

During a stand-by state in which power supply is cut off, a high-voltage power supply control circuit isolates a global negative voltage line transmitting a negative voltage and a local negative voltage line provided corresponding to each respective sub array block from each other and isolates a global ground line and a local ground line transmitting a ground voltage from each other. These local ground line and local negative voltage line are charged to a high voltage level through a high voltage line before cut-off from the corresponding power supply. A leakage current path from a word line to the negative voltage line or the ground line is cut off, so that the word line in a non-selected state can reliably be maintained at a non-selection voltage. Thus, in a low power consumption stand-by mode, data stored in a memory cell can be held in a stable manner.

Electrostatic precipitator (ESP) systems and methods are provided. A system includes at least one corona discharge electrode and at least one collector (and likely, at least a pair of collector electrodes) that extend downstream from the corona discharge electrode. An insulated driver electrode is located adjacent the collector electrode, and where there is at least a pair of collector electrodes, between each pair of collector electrodes. A high voltage source provides a voltage potential to the at least one of the corona discharge electrode and the collector electrode(s), to thereby provide a potential different therebetween. The insulated driver electrode(s) may or may not be at a same voltage potential as the corona discharge electrode, but should be at a different voltage potential than the collector electrode(s).

A compact linear accelerator having at least one strip-shaped Blumlein module which guides a propagating wavefront between first and second ends and controls the output pulse at the second end. Each Blumlein module has first, second, and third planar conductor strips, with a first dielectric strip between the first and second conductor strips, and a second dielectric strip between the second and third conductor strips. Additionally, the compact linear accelerator includes a high voltage power supply connected to charge the second conductor strip to a high potential, and a switch for switching the high potential in the second conductor strip to at least one of the first and third conductor strips so as to initiate a propagating reverse polarity wavefront(s) in the corresponding dielectric strip(s).

Described is a self-contained, small, lightweight, power-efficient and radiation-shielded module that includes a miniature vacuum X-ray tube emitting X-rays of a controlled intensity and defined spectrum. Feedback control circuits are used to monitor and maintain the beam current and voltage. The X-ray tube, high-voltage power supply, and the resonant converter are encapsulated in a solid high-voltage insulating material. The module can be configured into complex geometries and can be powered by commercially available small, compact, low-voltage batteries.

The present invention is to provide a control system for a hybrid vehicle in which, even if during traveling of the hybrid vehicle, a battery defect arises in a high-voltage power source, battery-less emergency traveling can be achieved over a sufficiently long distance, and the steering assist force can be effectively prevented from changing rapidly during traveling. The control section includes high-voltage power source defect processing unit. During execution of a mode in which the high-voltage power source, is reduced so that the reduced voltage is supplied to an electric power steering device (EPS), when a defect occurs in the high-voltage power source, the high-voltage power source defect processing unit shifts to a mode in which the low voltage of a low-voltage power source is increased so that the increased voltage is supplied to the EPS. The high-voltage power source defect processing unit then disconnects the high-voltage power source and the driving circuit from each other. Thereafter, the control section shifts to a mode in which a voltage corresponding to power generated by a generator is reduced so that the reduced voltage is supplied to the EPS, while allowing the generator to drive a traveling motor.

A low voltage CMOS circuit and method provide output current ability meeting multimode requirements of high voltage off-chip drivers while protecting the CMOS devices from various breakdown mechanisms. The circuit and method utilize intermediate voltages between two power rails and voltage division techniques to limit the voltages to acceptable limits for drain-to-source, gate-to-drain, and gate-to-source of CMOS devices in any chosen technology. The circuit comprises first and second CMOS cascode chains connected between a high voltage power rail, e.g 5 volt and a reference potential power rail, e.g. ground. Each CMOS cascode chain comprises first and second p-type MOS devices in series with first and second n-type MOS devices. An input circuit is coupled to a node at the midpoint of the first CMOS cascode chain. A bias voltage, typically 3.3 volts is connected to the NMOS devices in the first and CMOS cascode chains. A second bias voltage is coupled to the PMOS devices in the first and second CMOS cascode chains. An output is provided from the second CMOS cascode chain to a third CMOS cascode chain for purposes of providing sufficient pullup capability to drive an output circuit comprising a fourth CMOS cascode chain between the high and reference potentials without exceeding the breakdown mechanisms for any MOS device in the CMOS cascode chains.

The invention relates to a battery management system performance test platform and a testing method based on semi-physical simulation and belongs to the field of systems. According to the battery management system performance test platform and the testing method based on semi-physical simulation, the problems existing in the aspects of effectiveness, practicality, accuracy, generality and comprehensiveness of an existing battery management system testing device and method are solved. A BMS to be tested and a simulation control and emulating unit of the test platform are connected with a CAN bus. A signal output end of an insulation resistance testing device, a signal output end of an insulation voltage resistant testing device, a signal output end of a 24-channel single-body voltage simulator, a signal output end of a high-voltage source, a signal output end of a current source and current reversing module, a signal output end of a high-accuracy temperature environment box, a signal output end of an insulation resistance simulator and a signal output end of a direct current power source are respectively connected with corresponding signal input ends of the BMS to be tested. The BMS to be tested is arranged in a high-low-temperature operational testing box. The testing method comprises the steps of safety testing and the comprehensive testing of state parameter measuring accuracy, SOC estimating accuracy, a battery fault diagnostic function, a heat management function and environment adapting performance and is used for testing the battery management system.

The invention relates to a large multifunctional environmental simulator for electrical tests, which comprises an environmental stimulation chamber and is characterized in that an air heat-exchange circulation system and an ice-melting system are arranged in the environmental stimulation chamber; and the environmental stimulation chamber further comprises an ice-coating, rain-exposing and ultrasonic-atomizing system, a water treatment system, a heat-fogging system, a cooling water circulation system, a refrigeration system, a vacuuming and defogging system, a measurement and control system and an ultra-high voltage power supply system for providing a high-voltage charging state for test-pieces. By achieving the skillful coordination among the systems and the uniform operation control by the measurement and control system, the large multifunctional environmental simulator integrates various testing functions of environmental simulations, such as high-altitude, ice-coating, contamination, rain-exposing and other simulations into a whole. Therefore, the invention is widely suitable for the testing process for large multi-parameter environmental simulations.

The invention relates to an experimental facility and method for electric heating combined stress aging with oil-paper insulation of a transformer, wherein the facility has the advantages of simple structure and good use effect, is safe in running and convenient in sampling. The experimental facility comprises an outer cavity which is internally provided with at least one sealed inner cavity; theinner cavity is internally provided with a testing device which is provided with a high-voltage electrode and a low-voltage electrode; a sample is arranged between the high-voltage electrode and the low-voltage electrode which are mutually pressed; and the high-voltage electrode is connected with a high-voltage power supply and a current measurement and display system outside the outer cavity respectively.

Described is a self-contained, small, lightweight, power-efficient and radiation-shielded module that includes a miniature vacuum X-ray tube emitting X-rays of a controlled intensity and defined spectrum. Feedback control circuits are used to monitor and maintain the beam current and voltage. The X-ray tube, high-voltage power supply, and the resonant converter are encapsulated in a solid high-voltage insulating material. The module can be configured into complex geometries and can be powered by commercially available small, compact, low-voltage batteries.

In-system repairing or configuring faulty memories after being used in a system. In one embodiment, a memory chip can include at least one OTP memory to store defective addresses that are to be repaired. The OTP memory can operate without requiring additional I / O pins or high voltage supplies for reading or programming. The memory chip can also include control logic to control reading or programming of the OTP memory as needed.

According to one aspect of the present disclosure, a system for reducing peak power consumption in an electromechanically controlled cooking appliance is provided. The system comprises a surface heating unit comprising at least one duty cycle controlled surface heating element, a temperature controlled oven heating element, a controller configured to receive and process utility state signals indicative of the operating state of an associated utility, and a switch responsive to the controller, switchable between a first state and a second state for selectively coupling the oven heating element to a first relatively high voltage power supply and a second relatively low voltage power supply respectively. The controller is configured to switch the switch to the first and second states as a function of the utility state signal.

A method of and a system for stabilizing High Voltage Power Supply (HVPS) DC and AC voltages in multi-energy X-ray computed tomography scanners are provided. The method comprises generating filter ratios, computing DC and AC voltages, and feeding back the computed DC and AC voltages to the commanded voltages. The filtered ratios including an air ratio and a copper ratio are modeled as nonlinear functions of the DC and AC voltages. Computing DC and AC voltages include computing an m-ratio and an n-ratio. The parameters of the nonlinear model comprise an exponent parameter and a set of polynomial coefficients. The parameters are determined by a calibration procedure, which performs scanning at different combination of DC and AC voltages. The optimal parameters are obtained through a nonlinear least square minimization, which is solved through a brute force search over the exponent parameter and a closed form solution of the polynomial coefficients. Feeding back the computed DC and AC voltages include comparing the computed voltages with commanded voltages, integrating the difference between the computed voltages and commanded voltages, and adding the integrated voltage differences to the commanded voltages.

The invention discloses a shift register output control unit, a shift register and a drive method thereof and a grid drive device. The output control unit comprises N pull-up units, N pull-down units and N signal output ends. The nth pull-up unit is connected with a pull-up node, a high voltage source, an nth clock signal input end and the nth pull-down unit. The nth pull-down unit is connected with a pull-down node and a low voltage source. The connecting point of the nth pull-up unit and the nth pull-down unit is also connected with the nth signal output end. The output control unit is configured in a way that clock signals from N clock signal input ends are provided for the N signal output ends respectively under the control of voltage of the pull-up node and level of the output signals of the N signal output ends is pulled down under the control of the signals provided by the pull-down node, wherein N is an integer, and 2<=N<=4 and 1<=n<=N. Multiple rows of grid lines can be driven, and a situation that no interference exists among all outputs can be guaranteed.

A ion source for a mass spectrometer comprises: a capillary having a nozzle for emitting a nebulized fluid sample; an electrode of the capillary; a high voltage power supply; a second electrode disposed within or configurable to be disposed within a path of the nebulized fluid sample; and at least one switch for selecting application of an electrical potential provided by the high voltage power supply to either or both of the capillary electrode or the second electrode, wherein the capillary and capillary electrode are configurable so as to ionize the nebulized fluid sample by electrospray ionization and the second electrode is configurable so as to ionize the nebulized sample by atmospheric pressure chemical ionization.

A Digital Addressable Lighting Interface (DALI) receives power from a high voltage power circuit when in a standby mode. The DALI remains in a standby mode until signal activity on a DALI bus is detected, or the DALI may periodically switch from the standby mode to an active mode so as to sample any activity on the DALI bus. If no activity is detected then the DALI returns to the standby mode. If DALI bus activity is detected then the DALI remains in the active mode. The DALI receives power from a power controller when in the active mode. The DALI remains in the active mode so long as the power controller is supplying power to an electrical device.

A low-photon flux image-intensified electronic camera comprises a gallium arsenide phosphide (GaAsP) photocathode in a high vacuum tube assembly behind a hermetic front seal to receive image photons. Such is cooled by a Peltier device to −20° C. to 0° C., and followed by a dual microchannel plate. The microchannels in each plate are oppositely longitudinally tilted away from the concentric to restrict positive ions that would otherwise contribute to the generation high brightness “scintillation” noise events at the output of the image. A phosphor-coated output fiberoptic conducts intensified light to an image sensor device. This too is chilled and produces a camera signal output. A high voltage power supply connected to the dual microchannel plate provides for gain control and photocathode gating and shuttering. A fiberoptic taper is used at the output of the image intensifier vacuum tube as a minifier between the internal output fiberoptic and the image sensor.

The present invention provides an electrostatically atomizing device capable of instantly giving an electrostatically atomizing effect without requiring a water tank. The electrostatically atomizing device includes an emitter electrode, an opposed electrode opposed to the emitter electrode, a water feeder configured to give water on the emitter electrode, and a high voltage source configured to apply a high voltage across said emitter electrode and said opposed electrode to electrostatically charge the water on the emitter electrode for spraying charged minute water particles from a discharge end of the emitter electrode. The water feeder is configured to condense the water on the emitter electrode from within the surrounding air, enabling to supply the water on the emitter electrode in a short time without relying upon an additional water tank. Thus, an atomization of the charged minute water particles can be obtained immediately upon use of the device.

Low voltage electrical power is supplied to a diagnostic control device in a sealed compressor. Electrical power is tapped from a high voltage power line and transformed to low voltage power that in turn operates the diagnostic control device. The diagnostic control device and the electric voltage transforming system are housed within the sealed compressor shell, thus eliminating the need for additional openings in the compressor shell. Other low voltage devices can be powered in this way.