1526 results about "Voltage converter" patented technology

An electronic decoder for decoding of block coded wireless communications signals. The electronic decoder comprises at least two electrically interconnected analogue crossbar arrays (1110, 1120) of memristors. An electrical interconnection (1115) between a column (1111) of an analogue crossbar array of the at least two electrically 5 interconnected analogue crossbar arrays (1110, 1120) and a row (1121) of a following analogue crossbar array of the at least two electrically interconnected analogue crossbar arrays (1110, 1120) comprises a current-to-voltage converter (1101). A first analogue crossbar array (1110) of the at least two analogue crossbar arrays (1110, 1120) comprises at least a first row of memristors (1112a) with a single input and a 10 respective output for each column of memristors.

The invention relates to a pre-charge device (3041, Shu, 110, 120, 130, 140, µC) for a load, for example a capacitor (Ca), from a DC voltage source (102) comprising a first safety transistor (3041) capable of connecting the load (Ca) to said DC voltage source (102), and a control circuit (Shu, 110, 120, 130, 140, µC) in linear mode of the first safety transistor (3041), characterized in that said control circuit (Shu, 110, 120, 130, 140, µC) regulates the product of the pre-charge current (Ipr) and the voltage difference between the voltage measured across said DC voltage source (102) and the voltage measured across said load (Ca) with respect to a power setpoint (CP). during the linear control of the first safety transistor (3041) during the pre-charging of said load (Ca) by said DC voltage source (102),said power setpoint (CP) increasing during a first time interval from a first predefined value, for example zero, to reach a constant or approximately constant value and remain there for a second time interval following the first time interval. Figure for the abbreviation: Fig. 4,

The invention relates to an integral type photovoltaic energy storage assembly, belongs to the field of solar photovoltaic power generation, and aims to solve the problems that an existing photovoltaic energy storage product is complex in structure and installation, high in cost, low in efficiency and high in safety risk. The integrated photovoltaic energy storage assembly comprises a solar cell panel, an alternating current and direct current multidirectional conversion device and an energy storage battery. The AC-DC multidirectional conversion device and the energy storage battery are installed on the back surface of the solar cell panel, and the extension height does not exceed the back side end surface of the frame of the solar cell panel. The alternating current and direct current multidirectional conversion device comprises three groups of connecting ends, a plurality of voltage converters, a plurality of switch elements and a control chip, the three groups of connecting ends are electrically connected to a solar cell panel, an energy storage battery and an alternating current power grid respectively, and the control chip is configured to selectively switch on at least one switch element in different working modes of the integral photovoltaic energy storage assembly so as to control the three groups of connecting ends. A voltage conversion path is established between the respective two sets of connection terminals by means of at least one voltage converter.

A row driver assembly includes a row driver unit. The row driver unit includes a buffer circuit that drives a control signal to a pixel circuit. The buffer circuit is electrically connected to a high buffer supply voltage and to a low buffer supply voltage. A voltage converter circuit supplies the low buffer supply voltage to the buffer circuit. An error detection circuit outputs an active error signal when the low buffer supply voltage is outside a target voltage window.

This relates to an electric system for a motor vehicle, the vehicle including at least one power supply battery, the electric system including an electric charger intended to be connected, on the one hand, to the battery and, on the other hand, to an electric network outside the vehicle supplying an AC voltage or to electric equipment, and a microcontroller, the charger being able to charge the battery from an external electric network or to allow the battery to power the equipment, the charger including a DC-DC voltage converter able to operate in a first operating mode and a second operating mode, the microcontroller is characterized in that it is configured to control the activation of the first operating mode and to control the activation of the second operating mode.

A flying capacitor converter, a voltage converter and an energy storage system are provided. The flying capacitor converter includes a high-voltage side, a low-voltage side, a power switch unit, a current switch unit and a current detection unit. The high-voltage side is electrically connected with a first power source. The low-voltage side is electrically connected with a second power source. The power switch unit is electrically connected between the high-voltage side and the low-voltage side and includes three terminals and four power switches. The current switch unit is electrically connected with the high-voltage side, the low-voltage side and / or a common node. The current detection unit is electrically connected between a third terminal of the power switch unit and the common node. If the current detected by the current detection unit indicates that a short-circuit condition occurs, the power switch unit is disconnected from the high-voltage side and / or the low-voltage side.

An adjustable bandwidth current-to-voltage converter for use in an optical receiver includes an input configured to receive current from a photodetector; an amplifier stage connected to the input; a feedback path connected to the amplifier stage and to an output, wherein the feedback path includes a feedback element and an operating mode switch configured to set one of photodetector amplifier with dynamic load (PADL) mode and an integrate-and-dump (I&D) mode. The PADL mode is for higher baud operation than the I&D mode.

Techniques and mechanisms for a DC-DC voltage converter to mitigate a risk of damage to circuitry due to electrostatic discharge (ESD). In an embodiment, a protection circuit of the DC-DC voltage converter comprises a pull-up circuit and a pull-down circuit which are coupled in series between a first interconnect and a second interconnect, which are to receive a first supply voltage and a second supply voltage, respectively. A voltage divider comprises capacitors which are coupled in series with each other between the first interconnect and the second interconnect. Control circuitry is coupled with the voltage divider, and is further coupled to automatically configure a first operational mode based on an ESD event. During the first mode, the pull-up circuit is disabled and the pull-down circuit is enabled. In another embodiment, a resistor-capacitor (RC) circuit automatically transitions the protection circuit from the first mode.

A DC / DC converter includes a converter stage to receive an input voltage and to provide an output voltage from the input voltage in accordance with a modulated drive signal. The converter stage further provides a feedback voltage representing the output voltage. A controller circuit includes an error amplifier to receive the feedback voltage and a reference voltage and to provide an error signal based on the feedback voltage and the reference voltage. A PWM modulator receives a clock signal and the error signal and generates a modulated signal based on the clock signal and the error signal, and a logic circuit receives the modulated signal and generates the drive signal for the converter stage based on the modulated signal so that the drive signal has the same duty cycle as the modulated signal, when the duty cycle of the modulated signal is not smaller than a minimum duty cycle value.

The invention relates to a modular multilevel voltage converter (10) comprising three arms (a, b, c), each comprising an upper half-arm and a lower half-arm, wherein each half-arm comprises a chain of individually controllable submodules of formula (I), and wherein the converter further comprises a control unit (30) comprising at least one AC control module (40), a DC control module (52), and a modulation member (58) that is configured to deliver modulation signal setpoints for controlling the control members of the submodules of the upper and lower half-arms, wherein the modulation signal setpoints are delivered on the basis of voltages across the terminals of the capacitors of the submodules of the upper and lower half-arms and on the basis of modulation voltage setpoints applied to the upper and lower half-arms, and wherein the modulation voltage setpoints depend on a modulation voltage alternating component setpoint delivered by the AC control module, a modulation voltage common-mode component setpoint delivered by the DC control module, and a modulation voltage homopolar common-mode component setpoint, which depends on the voltages across the terminals of the capacitors of the submodules of the upper and lower half-arms.

The invention provides an electrical performance calibration device and method for fusing electrolytic hydrogen production and a hydrogen fuel cell. The electrical performance calibration device comprises an upper computer, a first digital sampling voltmeter, a second digital sampling voltmeter, a synchronous data acquisition card, a synchronous inspection switch, a current converter, a voltage converter, an electric pile, a programmable power supply, a self-calibration module and an external calibration signal source, the synchronous inspection switch is used for detecting a single-cell voltage bus of a galvanic pile and feeding back the single-cell voltage bus to a sampling end of the first digital sampling voltmeter, and a feedback end of the first digital sampling voltmeter is connected with a first input end of the upper computer; the current converter is used for detecting a current loop of the galvanic pile; the voltage converter is used for detecting the total voltage of the electric pile; and the programmable power supply is connected with a power supply terminal of the electric pile. According to the invention, the problems of poor synchronism, lack of self-calibration, low impedance measurement precision and incompatibility of two-way metering during electrical performance calibration of electrolytic hydrogen production and hydrogen fuel cells are solved.

Embodiments of the present application provide a power supply control method and apparatus of a server, and a power support unit of a server. The method includes: obtaining a target power supply power of a server to be powered; selecting, from a plurality of voltage converters deployed in a power support unit, one or more target voltage converters matched with the target power supply power; and controlling the one or more target voltage converters to supply power to the server, wherein each target voltage converter is configured for converting a power supply voltage of a power supply into a power supply voltage of the server. According to the present application, the problem in related art of low power supply efficiency of the power support unit can be solved, and the effect of improving the power supply efficiency of the power support unit is achieved.

The invention provides a transformer-free and coupling-inductor-free resonant soft switching circuit based on a reconfigurable secondary / semi-secondary DC-DC converter, according to the characteristics of the reconfiguration circuit, a designed auxiliary soft switching network does not influence the operation of each original circuit, and the original functions of the reconfiguration circuit are ensured; the number of the designed auxiliary soft switching networks is four, and the auxiliary soft switching networks comprise two single-capacitor auxiliary soft switching circuits and two multi-element networks containing auxiliary active switches. The two single-capacitor auxiliary soft switching circuits are used for a pre-stage circuit of the reconfigurable secondary / semi-secondary DC-DC converter; auxiliary soft switching networks are respectively designed around each main switching tube branch circuit of the reconfigurable secondary / semi-secondary DC-DC converter, and the soft switching function of a main switching tube and a post-stage fly-wheel diode is met on the basis that the functions of respective secondary step-down / semi-secondary step-up and step-down circuits are not influenced by each other; based on the design of the resonance type auxiliary soft switching network, three power diodes and two main switching tubes in the reconfigurable conversion main circuit can achieve the functions of conducting and turning off complete soft switching, and meanwhile auxiliary power devices of the auxiliary soft switching network assembly can also achieve the functions of conducting and turning off complete soft switching. The auxiliary soft switching network is suitable for a reconfigurable converter with more power diodes or main switches and high-frequency working conditions, can effectively improve the efficiency of the converter, and has a wide voltage regulation range and a load range.

The invention provides an automatic frequency locking circuit based on a time-to-voltage converter and a phase-locked loop, and relates to the technical field of phase-locked loops, a first frequency-halving unit and a second frequency-halving unit respectively carry out frequency-halving processing on a reference signal and a frequency division signal of a current comparison period to obtain a first square wave signal and a second square wave signal; the first square wave signal and the second square wave signal are transmitted to the time-to-voltage converter; the time voltage converter comprises a phase generation unit, a first charge pump and a second charge pump, the phase generation unit generates an enable signal according to the first square wave signal and the second square wave signal, and the first charge pump and the second charge pump respond to control of the enable signal and collect single pulse signals from the first square wave signal and the second square wave signal respectively so as to supply power to the input end of the comparator; the comparator compares power supply voltages of the two input ends to achieve frequency comparison of the reference signal and the frequency division signal. And selection in a plurality of phase signals is not needed, and required digital circuit modules are reduced, so that the delay of the reference signal and the frequency division signal in the conversion process is reduced.

Some embodiments include a voltage regulator including a clock node to receive an input clock signal, and first and second power switching blocks coupled to the clock node. The first power switching block includes a first clock generator and first switched capacitor circuitry. The first clock generator includes clock output nodes to provide first clock signals based on the input clock signal. The first switched capacitor circuitry includes input nodes to receive first control signals generated based on the first clock signals. The second power switching block includes a second clock generator and second switched capacitor circuitry. The second clock generator includes clock output nodes to provide second clock signals based on the input clock signal. The second switched capacitor circuitry includes input nodes to receive second control signals generated based on the second clock signals.

Embodiments of the present application provide a power supply control method and apparatus of a server, and a power support unit of a server. The method includes: obtaining a target power supply power of a server to be powered; selecting, from a plurality of voltage converters deployed in a power support unit, one or more target voltage converters matched with the target power supply power; and controlling the one or more target voltage converters to supply power to the server, wherein each target voltage converter is configured for converting a power supply voltage of a power supply into a power supply voltage of the server. According to the present application, the problem in related art of low power supply efficiency of the power support unit can be solved, and the effect of improving the power supply efficiency of the power support unit is achieved.

The invention is suitable for the technical field of voltage converters, and provides a control circuit, a control chip, a control system and a voltage converter. The control circuit comprises a first switch module, a selection switch module, a reference module, a clamping module, a current limiting module, a first current bias module and a second current bias module. The first switch module is electrically connected with the reference module, the current limiting module and the first current bias module, the selective switch module is electrically connected with the reference module, the clamping module and the current limiting module, the clamping module is electrically connected with the second current bias module, the first switch module is electrically connected with a source electrode of the switch tube, and the second switch module is electrically connected with a drain electrode of the switch tube. The selection switch module is electrically connected with the grid electrode of the switch tube, and the current limiting module is electrically connected with the drain electrode of the switch tube. According to the control circuit, the current limiting module is firstly adopted for current limiting control, then the switch tube is controlled to be slowly started for pre-charging, accurate current control is achieved, power consumption at the moment of starting is effectively limited, and stability and reliability of power supply for the load are greatly improved.

The invention relates to the technical field of high-voltage commutation, and discloses a control method and system for a composite LC filter of a high-voltage converter station, and a storage medium. According to the method, on the basis of staggered solid / liquid-filled dielectric plates and series hollow inductors in a sealed oil tank, by obtaining a capacitance / inductance adjusting instruction, the filling and pumping volume and speed of insulating liquid and magnetic liquid are controlled according to the absolute value of an adjusting value, and continuous and accurate adjustment of the filtering frequency and reactive power is achieved. The method comprises multiple optimization: monitoring high fluctuation of liquid, synchronously filling, pumping and radiating, balancing efficiency and energy consumption according to an adjusting frequency adaptive circulation speed, and performing reverse linkage cooperative adjustment on a dielectric medium pump and a magnetic liquid pump; and magnetic liquid leakage and insulation abnormity are treated in stages, so that operation is guaranteed. The method solves a traditional adjustment dead zone, does not need a power electronic device, is low in cost, is small in loss, is adaptive to outdoors, and improves the electric energy quality and equipment safety of a converter station.

An inductor-inductor-capacitor (LLC) converter may include a control system that holds a duty cycle of control signals at a desired ratio, such as 50%. The control system may include a counter that is configured to count up and down and is further configured to generate event signals that are received at the inputs of a latch. An event signal may cause and output value of the latch to change from high to low or vice versa. There may be further circuits to add delay and / or inversion to generate multiple control signals from the output of the latch. Furthermore, the counter may be configured to switch from counting up to counting down in response to a comparator output.

The embodiment of the invention provides a control circuit of a voltage converter, a chip and electronic equipment. The control circuit of the voltage converter comprises a reference current generation circuit and a driving control circuit, the reference current generation circuit is configured to generate a minimum reference current according to the bias current source under a light load condition, generate an enhanced current according to a differential voltage of a reference voltage and a feedback voltage under a heavy load condition, and generate a target reference current in combination with the minimum reference current, and the target reference current is greater than the minimum reference current; the driving control circuit is configured to control the second power switch tube to be turned off when the inductance sampling current rises to a high-order comparison threshold value, the inductance sampling current is the sampling current of the inductance current of the voltage converter, and the high-order comparison threshold value is the sum of the minimum reference current and a preset current hysteresis window; and when the inductance sampling current is reduced to the target reference current, the second power switch tube is controlled to be conducted. The circuit realizes light-load ultra-low power consumption, heavy-load transient response and stable voltage regulation and control.

The invention is suitable for the technical field of voltage converters, and provides a gate drive circuit and a voltage converter. The gate driving circuit comprises a driving module, a starting control module and a first switch module, the driving module is electrically connected with the starting control module and the first switch module, the starting control module is electrically connected with the first switch module, and the driving module, the starting control module and the first switch module are used for being electrically connected with a gate of a high-side switching tube. The starting control module and the first switch module are both used for being electrically connected with the source electrode of the high-side switch tube. According to the gate drive circuit provided by the embodiment of the invention, the starting process of the high-side switching tube is controlled by stages, so that the voltage overshoot can be reduced and the electromagnetic interference and the overvoltage risk of the high-side switching tube can be effectively reduced on the premise of ensuring that the switching loss is not changed.

The invention is suitable for the technical field of voltage converters, and provides a power supply circuit and a voltage converter. The power supply circuit comprises a comparison module, a first logic module, a second logic module, a first switch module and a second switch module, the comparison module is electrically connected with the first logic module and the second logic module, the first switch module is electrically connected with the second switch module and the first logic module, and the second switch module is electrically connected with the second logic module. The comparison module is used for receiving an enable signal, an input voltage of a voltage conversion module in the voltage converter and an output voltage of the voltage conversion module, the first switch module is used for receiving the input voltage, the second switch module is used for receiving the output voltage, and the first switch module and the second switch module are both used for being electrically connected with the gate driving module. According to the power supply circuit provided by the embodiment of the invention, when the enable signal is a low-level signal and the output voltage is greater than the input voltage, the current can be ensured to be relatively small and controllable, and a chip is not influenced.

The invention provides a driving circuit control method and system and a vehicle, and the method comprises the steps: responding to a driving circuit control instruction, and entering a vehicle window driving mode or a wireless charging mode; under the condition of the vehicle window driving mode, the battery voltage is adjusted to be first voltage through the voltage converter and then output to the driving circuit, the driving circuit drives the motor to rotate, and the vehicle window is controlled to ascend or descend; under the condition of a wireless charging mode, the voltage converter adjusts the battery voltage into a second voltage and outputs the second voltage to the driving circuit, and the driving circuit activates the resonance circuit to generate resonance to transmit electric energy. The driving circuit for controlling the vehicle window can be reused for wireless charging, the problem that repeated components cannot be reused due to the fact that the vehicle window driving circuit and the wireless charging module are designed separately is solved, and the circuit cost is reduced. By sharing the voltage converter, the problem of large space occupation caused by discrete design between the vehicle window driving circuit and the wireless charging module is solved.

To provide an electronic component unit and a wire harness which can supply power properly to various apparatuses equipped in a vehicle.SOLUTION: An electronic component unit 10, which is applied to a wire harness, includes: a power source terminal 11 equipped in a vehicle and connected to a power source B2 for supplying power at a first voltage V1; a circuit branch part 13 connected to the power source terminal 11, the circuit branch part causing power supplied from the power source B2 to branch to a plurality of power source systems PL; and a voltage converter 15 removably provided to at least one of the power source systems PL in the circuit branch part 13, the voltage converter converting the voltage of power supplied from the power source B2 to a second voltage V2, which is lower than the first voltage V1, and outputting the second voltage V2.SELECTED DRAWING: Figure 6

The invention relates to a power optimizer and a method for realizing power optimization. Relates to the field of photovoltaic power generation. The power optimizer comprises a voltage converter used for converting electric energy extracted from the photovoltaic module into output power, and a specified output parameter and a specified input parameter of the voltage converter are compared to obtain an actual conversion ratio. And performing power optimization on the photovoltaic module in a manner of reducing the difference between the actual transformation ratio and a preset target transformation ratio.

When a current-to-voltage converter is used at low temperatures, the frequency band of measurable small currents is limited. Stray capacitance of a coaxial cable that takes out an output voltage of the current-to-voltage converter from inside to outside a cooling device narrows the operating frequency band of the current-to-voltage converter. The current-to-voltage converter of the present disclosure uses elements exclusively optimized for low-temperature operation (e.g., HEMTs) as electronic elements for current-to-voltage conversion. This configuration realizes current-to-voltage conversion characteristics with significantly more excellent sensitivity than that of the conventional technique even when the current-to-voltage converter is operated at a low temperature of 150K or less or in cryogenic temperature conditions close to absolute zero. Further, a source follower circuit is added to an output stage of the current-to-voltage conversion circuit to isolate the effect of stray capacitance added to the output side of the current-to-voltage conversion circuit and achieve a wider bandwidth.

The ultralow frequency sensor comprises a vibration detection unit, a power supply voltage stabilization unit and a signal conditioning unit, the power supply voltage stabilization unit is provided with a low dropout linear voltage regulator U20, a voltage converter U19 and a negative voltage regulator U21, and the low dropout linear voltage regulator U20 stabilizes an external power supply as a positive power supply VCC; the voltage converter U19 is used for converting positive voltage of an external power supply into negative voltage and outputting stable negative power supply VEE through the negative voltage stabilizer; the positive power supply VCC and the negative power supply VEE supply power to the signal conditioning unit; the signal conditioning unit comprises a high common mode rejection differential amplifier, a differential-to-single-ended amplifier, a band-pass filter and a differential output driver, a differential signal output by the vibration detection unit sequentially passes through the high common mode rejection differential amplifier, the differential-to-single-ended amplifier, the band-pass filter and the differential output driver, and then a differential voltage signal is output; the method has the advantages of high stability and reliability and the like.

The invention relates to a device and method for exploiting natural gas hydrate through offshore wind-wave-light multi-energy combined power generation and depressurization cooperation, and belongs to the field of ocean natural gas hydrate resource development. The device comprises an underground wind-wave-light multi-energy combined power generation device, an energy storage heating device and a central control device; the underground wind-wave-light multi-energy combined power generation device comprises a photovoltaic panel, a vertical axis fan and an oscillating water column type power generator; the energy storage heating device comprises an electric energy storage device, a voltage converter and an underground heater; the central control device comprises a computer, a wellhead pressure adjusting signal executing mechanism, an electric energy adjusting signal executing mechanism and a wellhead. The computer transmits wellhead pressure and electric energy adjusting information through the real-time signal optical cable, and real-time adjustment of the wellhead pressure and power supply of the underground heater is achieved. Heat absorbed by hydrate decomposition is supplemented to a hydrate stratum in an electric heating mode, the temperature of the hydrate stratum is increased, and guarantee is provided for efficient development of marine natural gas hydrates.

The invention is applicable to the technical field of voltage converters, and provides a control device and a control method of a direct-current voltage converter and electronic equipment, and the control device is configured to obtain the working state of the direct-current voltage converter, the permission state of a battery and the balance state of a low-voltage side capacitor bank; and when it is detected that the working state of the DC voltage converter is a standby state and the equalization state of the low-voltage side capacitor bank is an unbalanced state, the current flow direction in the charging and discharging module is controlled according to the permission state of the battery so as to perform equalization control on the voltage of each capacitor in the low-voltage side capacitor bank. According to the technical scheme, the low-voltage side capacitor voltage-sharing control is executed in advance when the direct-current voltage converter is in the standby stage, so that the system can directly enter the power control state after receiving the power request, the response time for reaching energy output under a power instruction is remarkably shortened, and quick starting and smooth switching are achieved.

A switched capacitor voltage converter circuit includes: a switched capacitor converter and a control circuit. The switched capacitor converter includes at least one resonant capacitor, switches and at least one inductor. The control circuit generates a pulse width modulation (PWM) signal according to a first voltage or a second voltage and generates a control signal according to the PWM signal and a zero current detection signal. The control signal controls the switched capacitor converter by operating the corresponding switches to switch electrical connection of the inductor, so as to convert the first voltage to the second voltage or convert the second voltage to the first voltage.