1097 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 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.

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.

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 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.

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 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 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.

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.

The invention discloses a vehicle charging control method and device, a vehicle and a computer readable storage medium, and the method comprises the steps: judging whether a primary vehicle and a secondary vehicle meet a first preset condition or not when a received instruction used for indicating the vehicle to enter a preset charging mode is valid, the first preset condition comprises that neither the primary vehicle nor the secondary vehicle has a fault, and if yes, the primary vehicle and the secondary vehicle enter the preset charging mode; the power battery of the primary vehicle and the power battery of the secondary vehicle are connected with the voltage converter; if yes, the vehicle is controlled to enter a preset charging mode, and the power battery of the child vehicle is controlled to charge the power battery of the mother vehicle through the voltage converter. In the vehicle transportation process, the mother vehicle is charged through the son vehicle, the endurance mileage of the mother vehicle can be prolonged, the requirement for parking and charging in the midway is avoided, the transportation time cost is reduced, the transportation efficiency is improved, meanwhile, the number of vehicles running in the vehicle transportation process can be reduced, and therefore the passing cost of the vehicles is reduced, and the purpose of saving the cost is achieved.

An apparatus comprises a power electronic energy conversion system comprising a first energy storage device configured to store DC energy and a first voltage converter configured to convert a second voltage from a remote power supply into a first charging voltage configured to charge the first energy storage device. The apparatus also includes a first controller configured to control the first voltage converter to convert the second voltage into the first charging voltage and to provide the first charging voltage to the first energy storage device during a charging mode of operation and communicate with a second controller located remotely from the power electronic energy conversion system to cause a second charging voltage to be provided to the first energy storage device during the charging mode of operation to rapidly charge the first energy storage device.

A LLC voltage converter for converting a DC input voltage to a DC output voltage. The LLC voltage converter includes: a transformer having an input winding and an output winding, a controller and a current sensor. The current sensor measures a primary current through the input winding of the transformer and provides a measurement of the primary current to the controller. The controller determines when a secondary current, through the output winding of the transformer, is substantially zero based on the measurement of the primary current and a maximum value of the primary current.

The invention belongs to the technical field of equipment fault diagnosis, and relates to an extra-high voltage converter valve fault diagnosis method and device and a readable storage medium. Inputting a sound signal of the high-voltage converter valve to be detected into a bidirectional gating circulation unit in the fault diagnosis model, and outputting a time feature vector; inputting the time-frequency graph of the sound signal of the high-voltage converter valve to be detected into a plurality of multi-view feature extractors which are connected in series in the fault diagnosis model and have gradually reduced convolution kernel sizes, and obtaining a spatial feature graph based on the output of the last multi-view feature extractor; aligning and fusing the time feature vector and the space feature map, and outputting a target feature vector; and inputting the target feature vector into a classifier in the fault diagnosis model, and outputting the fault category of the to-be-detected high-voltage converter valve. According to the scheme, the problem that noise and fault signals are overlapped in a single dimension is solved, subtle differences of subdivided faults are amplified, and the accuracy and the refinement degree of fault diagnosis of the high-voltage converter valve are improved.

A switch control method is applied to a hybrid voltage converter including a switched capacitor unit and a freewheeling unit. The method including obtaining the output current of the hybrid voltage converter, when the output current is greater than a first current threshold, controlling the switches in the hybrid voltage converter to operate in parallel conduction mode, when the output current is less than the first current threshold, controlling the switches in the hybrid voltage converter to operate in sequential conduction mode. When the switches operate in parallel conduction mode, N switches in the switched capacitor unit are controlled to turn on and off with the same duty cycle and a phase shift of 360 / N degrees. When the switches operate in sequential conduction mode, each switch in the switched capacitor unit is controlled to conduct individually with the same duty cycle in sequence.

In one example, a system comprises: a vector-by-matrix multiplication array comprising non-volatile memory cells arranged into rows and columns; and an output block coupled to the vector-by-matrix multiplication array comprising: a current-to-voltage converter to convert current received from a column of the vector-by-matrix multiplication array into a voltage, an analog-to-digital converter to convert the voltage into digital bits, and a configuration circuit to convert the digital bits into unsigned digital bits.

The invention discloses a gallium nitride hybrid switched capacitor voltage converter with a high step-down ratio, which belongs to the technical field of switching power supplies and comprises an input filtering module, a switched capacitor module group, a half-bridge module group and an output filtering module which are connected in sequence, the switched capacitor module group comprises a plurality of switched capacitor modules which are connected in parallel, the half-bridge module group comprises a plurality of half-bridge modules which are connected in parallel, and the switched capacitor modules and the half-bridge modules are in one-to-one correspondence and work in corresponding preset switching periods; the output filtering module comprises a plurality of output filtering inductors, and the output filtering inductors are correspondingly connected with the half-bridge modules. Through innovation of the topological structure, the buck ratio higher than that of a traditional Buck converter under the same duty ratio is achieved, input current and output voltage ripples are further improved through a multi-phase interleaving parallel control mode, wide bandgap devices are reasonably selected for the innovatively-designed topological structure, and therefore the output current and output voltage ripples are improved. And the circuit is more suitable for kilowatt-level switching power supply equipment.

A second control unit performs a switching control task of repeatedly switching between an on state and an off state of an upper-arm switching device of a voltage converter in response to determination that a monitored terminal voltage across a smoothing capacitor is not lower than or equal to an anomaly determination threshold during failure of a first control unit. The second control unit determines whether the switching control task causes the monitored terminal voltage across the smoothing capacitor to be lower than or equal to the anomaly determination threshold. The second control unit controls, in response to determination that the switching control task causes the monitored terminal voltage across the smoothing capacitor to be lower than or equal to the anomaly determination threshold, at least one motor-generator to perform a limp-home control task of the electric vehicle.

A dual active bridge converter is provided with a control variable that is superimposed with an additional ripple component to control the dual active bridge converter with a combination of the control variable and the additional ripple component.

In one example, a system comprises a vector-by-matrix multiplication array comprising non-volatile memory cells arranged into rows and columns; and an output block coupled to the vector-by-matrix multiplication array to receive current from the columns of the array, the output block comprising a current-to-voltage converter to receive current from one or two columns and convert the current into a voltage, the current-to-voltage converter comprising one or more variable resistors configurable to adjust the range of the voltage; and an analog-to-digital converter to convert the voltage into digital bits.

A series-parallel switched capacitor voltage converter includes inductive branch, a first branch and a second branch, the inductive branch is connected between the first branch and the second branch. By controlling turning on and off of the switches of the first branch, the second branch and inductive branch, charges on capacitors of one branch are completely transferred to another branch via the inductive branch within a period of time after all main switches of the first branch and the second branch are turned off, and a voltage difference between both terminals of each of the main switches becomes zero, then each of the main switches is started to be turned on, the voltage difference of each of the main switches is zero at an instant when the main switches are turned on.

The present disclosure provides a single-inductor multiple-output voltage converter, a power supply chip, and an electronic device, where the single-inductor multiple-output voltage converter comprises an energy generation circuit, an energy distribution circuit, a peak-inductor-current detection circuit, a zero-inductor-current detection circuit, and a control logic circuit. The aforementioned converter can provide multiple different output voltages using a single inductor without multiple operational amplifiers, thereby avoiding excessive bandwidth demand associated with multiple operational amplifiers, thus reducing power consumption.