60 results about "Low 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.

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.

The invention discloses a method for updating heavy hydrocarbon to produce light oil and a plasma hydrogenation reactor for the method. The plasma hydrogenation reactor comprises a cavity and a preheater, wherein the cavity is surrounded by low-voltage electrode reaction tubes, the top and the bottom of the cavity are respectively sealed by an upper insulating flange and a lower insulating flange, the inside of the cavity is provided with high-voltage electrodes extending in the axial direction of the cavity, the low-voltage electrode reaction tubes and the high-voltage electrodes are respectively connected with a plasma power supply, the inside of the cavity, corresponding to the reaction areas of the high-voltage electrodes, is provided with insulating medium, the outside of the cavity is sheathed with a heating furnace, the preheater is communicated with the cavity by a material inlet, and the inside of the cavity, corresponding to a gas product outlet, is provided with a gas and liquid separating area. Compared with the traditional catalytic hydrogenation, the amount of free radicals of active hydrogen is increased in a doubling way by the plasma hydrogenation, the generation amount and generation speed of the free radicals of the active hydrogen can be adjusted through adjusting the discharging parameters, and the generation amount and generation speed of the free radicals of heavy oil can be adjusted through adjusting the temperature, so as to realize a matching purpose.

A system for controlling battery usage in a mobile power supply includes a controller for monitoring a state of charge of the battery and the voltage and switching off all power from the battery when the battery reaches a predetermined power off state of charge or a low voltage condition. A switch provides power to the controller in response to receipt of power from an other source, thereby causing the controller to resume monitoring of the state of charge of the battery. When the battery reaches a predetermined power off state of charge, the controller switches off power from the battery. The switch turns the controller back on in response to receipt of power from the other source. When the battery is recharged to a predetermined restart state of charge and when the voltage reaches a restart voltage, power from the battery is switched back on.

The invention provides a power line carrier communication terminal device which comprises a power line carrier power adapter system used for allowing a strong-current power supply to be subjected to voltage reduction processing for outputting a low-voltage power supply, a signal modulation-demodulation system used for modulating/demodulating signals, and a signal transmission device used for transmitting low-voltage power supply and power line carrier signal, wherein the power output interface of the power line carrier power adapter system is connected with the power input interface of the signal modulation-demodulation system through the signal transmission device, so as to supply low-voltage direct current supply; and the power line carrier signal transmission interface of the power line carrier power adapter system is connected with the power line carrier signal transmission interface of the signal modulation-demodulation system through the signal transmission device, so as to realize the power line carrier signal communication. The device provided by the invention solves the electric safety problem, has an integrally reduced size and brings convenience for integration.

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 discloses a circuit for a low-voltage adjustable band-gap reference source. Collectors and bases of three PNP triodes are grounded; the emitter of the first PNP triode is connected with one end of a first resistor; the other end of the first resistor is connected with the positive input end of an operational amplifier and the drain of a first P-channel metal oxide semiconductor (PMOS) transistor; the emitter of the second PNP triode is connected with the negative input end of the operational amplifier and the drain of a second PMOS transistor; the emitter of the third PNP triode is connected with one end of a second resistor; the other end of the second resistor is connected with the drain of a third PMOS transistor and one end of a third resistor; the other end of the third resistor is grounded; the output end of the operational amplifier is connected with the grids of the three PMOS transistors; and the sources of the three PMOS transistors are connected with a power supply. According to the circuit, configurable reference output voltage can be realized; and the influence of offset voltage of the operational amplifier on a starting circuit is avoided.

The invention discloses a low-power consumption bandwidth multiplication chopping stabilized operational amplifier based on an MOS (metal oxide semiconductor) device, which belongs to the field of design of analog integrated circuits. The low-power consumption bandwidth multiplication chopping stabilized operational amplifier comprises two frequency mixers, a shunt input stage, an intermediate stage for amplifying recovered current and a rail-to-rail output stage, wherein one frequency mixer is placed in front of an amplifier input stage, and the other frequency mixer is placed behind an amplifier output stage, thereby realizing the functions of raising frequency and reducing frequency of input signals; the shunt input stage is used for converting input voltage signals to current signals and forming small signal current in forward and backward directions; the intermediate stage for amplifying the recovered current comprises four low-voltage current mirrors and can realize the amplification of the recovered current; and the rail-to-rail output stage is used for realizing the rail-to-rail output of the signals. The low-power consumption bandwidth multiplication chopping stabilized operational amplifier has the capacity of improving bandwidth by nearly three times under the situation of not obviously increasing power consumption, and can reduce low-frequency 1/f noise, increase low-frequency gain, and reduce power consumption above one half while keeping the same bandwidth, the noise and other performances, thereby further improving the performances of the circuit.

The invention relates to a low-voltage electrical appliance communication protocol adapter which comprises double single chips, double Modbus-RTU protocol converting circuits, a Profibus-DP, a DeviceNet protocol converting circuit, an off chip data memory, an LCD (liquid crystal display) screen and a keyboard, wherein on chip universal asynchronous receiver-transmitters of the double single chips are respectively connected with the Modbus-RTU and an RS485 level converting transceiver circuit; an on chip control local area network is respectively connected with double DeviceNet converting transceiver circuits to finish acquiring low-voltage electrical appliance data and responding to bus commands and events; meanwhile, I2C communication modules of the single chips are connected with the off chip data memory based on I2C to finish storing the data and extracting processed low-voltage electrical appliance parameters. Due to the adoption of double processor operations and a caching technology, technical schemes such as response time, and the like when other adapters are operated are reduced so as to ensure that the low-voltage electrical appliance communication protocol adapter becomes a centralized controller, a small network server and an adapter. The adapter can hang at most three buses, thereby increasing the adaptability of low-voltage electrical appliances during networking and facilitating users mounting.

The invention relates to a method for preparing a perylene polyimide derivative film in the technical field of photoelectric materials. In the method, hydrazine hydrate is used for replacing trifluoroacetic acid, a positive electrode deposition method is adopted, and a dense and uniform film is prepared with a low voltage of 0.5-5V and a low current of 0.02-5mA within a relatively short deposition time. Moreover, composite films conforming to various absorption ranges are prepared through changing the structure and the matching of the perylene polyimide derivative.

The invention provides a common mode moving circuit for a multipoint low voltage differential signal receiver. The common mode moving circuit comprises a first resistor, a second resistor and a current regulating circuit as well as an error amplifier, wherein the current regulating circuit is formed by a third and fourth resistors and first to sixth transistors; grids of the second and fifth transistors are in a short connection with a drain electrode; grids of the first, second and third transistors are connected with each other and the source ends are grounded; grids of the fourth, fifth and sixth transistors are connected and the source ends are connected with power supply voltage; drain ends of the first and fourth transistors are connected with the first resistance; the third and fourth resistance is in a serial connection between a drain end of the second transistor and a drain end of the fifth transistor; drain ends of the third and sixth transistors are connected with the second resistor; a difference-mode input end of the error amplifier is connected with a reference level; and a common mode input end is connected with the drain ends of the first and third transistors. No effects are caused to input signal differential value; and the common mode moving circuit has system noise ratio higher than a receiver using a compression network.

The present invention introduces method and device for automatically collecting bee venom. The biological characteristic of worker bee, which is low voltage and small current stimulated to stick and expel venom, is utilized in automatically collecting bee venom. The device for automatically collecting bee venom consists of AC or DC power source, automatic AC or DC controller, and bee venom collector. The device has simple control circuit structure, easy making, low cost and small size, and is especially suitable for collecting bee venom.

The invention belongs to fields of electronic protection alarm facilities, specially an electronic protection alarm enclosure which is used in temporary job location or during maintenance work. It includes chassis and backstay fixed to the chassis and voice-light alarm device, battery, power switch and control circuit which is set on the backstay, said alarm belt is enlaced to reeled device, the reeled device is fixed to the backstay, and enlaced to the alarm belt via hinge axis, contact induction device which includes pulse generator and control circuit is set on one end of the hinge axis, hanging belt hook is set on said backstay, said control circuit includes battery low voltage indicating circuit and electronic switching circuit. The invention provides a new type of enclosure which possesses enclosure belt which is adjustable and contact alarm facilities.

A method for controlling amplified signals in a medical diagnostic device having an amplifier system that is adapted to amplify input signals having a baseline and filter means for filtering the amplified signals, comprising the detection of the presence of an amplified signal having an amplitude that is above an upper voltage threshold or below a lower voltage threshold, and freezing the baseline of the amplified signal upon the detection thereof.

The invention relates to a rail vehicle which comprises at least one motor compartment (1) with power supplied from a traction intermediate circuit (3) and a traction motor, and at least one non-driven compartment (7,8). The non-driven compartment can be braked by a brake controller (10) equipped on the front through an eddy current brake excited through the brake current of the traction motor. The vehicle has an eddy current brake whose brake plate is attached to a train line (5) through an arrangement (9) for providing direct voltage with a significantly lower voltage level of the traction intermediate circuit (3). Therefore, the rail vehicle is cheap and low in energy consumption. The train line (5) is connected with the traction intermediate circuit (3) through an inverter (4). The arrangement (9) for providing DC voltage and the brake controller (10) are equipped in the non-driven compartment.

The present invention discloses a read and match circuit for a low-voltage content addressable memory, wherein the write circuit inputs the signals needing storing into the memory cells, and the read circuit retrieves the stored signals from the memory cells, and the match circuit compares the data stored in the memory cell with the data searched by the match circuit. As the circuits for writing, reading and matching are separated from each other and exempt from mutual interference, the present invention can achieve high reliability and low power consumption under a low-voltage operation environment without using a special fabrication process. In the present invention, the circuit is optimized to meet different requirements. The present invention enables the user to determine whether to have high speed or to have low power consumption. Further, the present invention can overcome the problems of current leakage and noise allowance in a low-voltage environment.

The invention discloses a low-voltage draw-out type switch cabinet. The low-voltage draw-out type switch cabinet comprises three component parts, i.e., a cabinet A, a cabinet B and a cabinet C. The three cabinets are combined to form an integral body, the lower ends of the cabinet A, the cabinet B and the cabinet C are provided with horizontally arranged air inlet fences, the side walls of the cabinet A, the cabinet B and the cabinet C are provided with air outlets, and separator plates are arranged and connected among the three cabinets. The low-voltage draw-out type switch cabinet is reasonable in structural design, good in ventilation and heat dissipation effect and low in noise.

The invention discloses a self-coupling step-down compensation integrated soft start device which couples the two functions of a self-coupling transformer and a magnetic-valve type controllable reactor together through an ingenious circuit and magnetic circuit design, and relates to the start-up of an extra-high/ultra-high capacity high-voltage motor. A high-voltage side magnetic core and a low-voltage side magnetic core are completely the same in structure, the high-voltage side magnetic core is composed of a first iron core, a second iron core and a first side yoke, a first coil and a second coil are wound on the first iron core, a third coil and a third coil are wound on the second iron core, and the other end of each of the first coil and the third coil is connected with the other end of each of the second coil and the fourth coil in parallel; one end of a high-voltage side winding is connected with the positive pole of an input power supply, the other end of the high-voltage side winding is connected with the input end of a low-voltage winding and accessed to one end of a motor, and the other end of the low-voltage side winding is connected with the negative pole of the power supply and the other end of the motor. The self-coupling step-down compensation integrated soft start device is capable of smoothly changing the impedances of a high-voltage side and a low-voltage side, low in start current, small in size, stable in start performance, fast in response speed, and long in service life.

The present invention discloses a short circuit and detection dual-purpose device used for relay protection. The short circuit and detection dual-purpose device is characterized by comprising a cuboid operation box, wherein the operation box is equipped with a buckle-type opening-closing door, and a fuse placement fastening groove is arranged in the door; the operation box is additionally equipped with a circuit on-off selection switch, a circuit on-off indication lamp, a rotary switch, a voltage display meter, a first current display meter and a second current display meter, a wiring port is arranged on the side surface of the operation box, and a short circuit alarm circuit and a detection circuit are arranged inside the operation box. Compared with the prior art, the advantages of the present invention are that: the short circuit and detection dual-purpose device is simple and reliable in circuit design, the personal low-voltage electric shock caused by that the operation personnel touch a test wiring wrongly in a live wire manner and the damage of a relay protection tester and a protection device plug-in are avoided, the personal injury and the equipment damage caused by a wrong short circuit during a short circuit test process are avoided effectively, and the accuracy and the safety during the short circuit test are improved.

The invention relates to a rapid reactive compensation method for a low-voltage distribution system. The rapid reactive compensation method for the low-voltage distribution system is applicable to reactive compensation for a low-voltage alternate current (AC) network and comprises that first, a current acquisition module acquires voltage and current signals in the electric network and a reactive compensation current output to the electric network by an inverter module and the voltage and current signals and the reactive compensation current are transmitted into a control module, second, the control module executes calculation with a real domain digital phase shifting method and extracts a reactive power part of the voltage and current and signals and the reactive compensation current, third, comparison between the extracted reactive power part and a reactive compensation signal output to the electric network is carried out to obtain the difference, and fourth, the control module works according to the difference, the difference is transmitted to the inverter module after processed by a hysteresis comparator, and the reactive compensation for the network is achieved through a hysteresis tracking compensation var generator. Compared with the prior art, the rapid reactive compensation method for the low-voltage distribution system can automatically compensate the reactive current of the low-voltage AC network, restrain voltage fluctuation and flickering and thus promote the operating efficiency of the electric network.

The invention provides an LED (Light-Emitting Diode) unit and a constant-flow unit voltage-stabilizing LED control circuit. The constant-flow unit voltage-stabilizing LED control circuit comprises a rectifier bridge, at least one LED control unit series branch and at least one current limiting resistor, wherein the rectifier bridge is connected with a power supply, and the LED control unit series branch is connected with the rectifier bridge. The constant-flow unit voltage-stabilizing LED control circuit utilizes the forward voltage drop characteristic of a voltage stabilizing tube and a diode, the voltage-stabilizing role of the full unit is played. The control mode is cheaper and more practical, and the efficiency is higher. In addition, when the voltage of the power supply is lower than the normal power supply voltage, as the full circuit works in a working state lower than a voltage stabilizing value, the lower voltage is uniformly shared by the voltage-stabilizing circuits of the full unit, the brightness of all LEDs is uniformly reduced, and therefore the continuous dimming function can be realized in a certain voltage range. Practices prove that the full circuit can reliably work in the voltage range of AC (Alternating Current)/DC (Direct Current) 120V to 270 V.