509 results about "Voltage converter" patented technology

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.

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 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 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 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.

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.

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.

Provided is a wireless power transmitting system and device, the wireless power transmitting device including: a signal generator configured to generate an initial signal; a controller configured to output an amplitude control signal and a phase control signal; a phase modulator configured to generate a phase-modulated signal by modulating a phase of the initial signal based on the phase control signal; a power amplifier configured to generate a power signal by amplifying the phase-modulated signal; a voltage converter configured to control a magnitude of a power voltage of the power amplifier based on the amplitude control signal; and an antenna configured to externally output the power signal.

The invention discloses a gallium nitride soft switching high-voltage Buck voltage converter, belongs to the technical field of switching power supplies, and solves the problems of large device switching loss, high thermal stress, large voltage peak and high-frequency oscillation caused by a switching capacitor link in a traditional high-voltage Buck switched capacitor voltage converter by introducing an auxiliary soft switching link. The efficiency and the reliability of the system are improved; furthermore, by introducing a double-phase interleaving parallel structure, the current output capability of the power supply is improved, and the application in a higher power scene can be realized; meanwhile, by adopting the gallium nitride transistor, compared with the traditional scheme, the switching frequency is improved, the size of a passive element is reduced, the integration level of a PCB is improved, the parasitic parameters of the system are reduced, the dead time and the duty ratio loss are reduced, and the system efficiency and the power density are further improved.

A voltage converter is provided, comprising:a first circuit board with a first circuit section of the voltage converter, wherein the first circuit section comprises semiconductor chips embedded between metal layers of the first circuit board, anda second circuit section a second circuit board with a second circuit section of the voltage converter, wherein the first circuit section is electrically coupled to the second circuit section.

The invention discloses a multi-agent construction method for fault handling of a high-voltage converter station, and relates to the technical field of electric power automation, and the method comprises the following steps: S1, mapping establishment of in-station equipment and agents; s2, constructing a unified identifier and event model; s3, organization and credibility calibration of evidence information; s4, performing consistency arbitration and conflict grading processing; s5, arranging and executing a fault disposal process; s6, running experience learning and rule self-evolution; and S7, auditing and tracing the disposal process. According to the method, a multi-agent construction mechanism is introduced into the converter station, devices such as a direct current pole, a valve tower, protection, measurement and control, operation and the like are respectively mapped into independent agents, and cross-domain cooperation is realized under a unified identification and event model; each agent not only has an autonomous information processing capability, but also can realize rapid fusion and consistency judgment of multi-source information through an evidence chain and an arbitration mechanism, thereby forming explainable and traceable disposal suggestions when a fault occurs.

A measuring system comprises a voltage converter circuit that converts and outputs a voltage between a first terminal and a second terminal, and a computing device that detects anomalies in the voltage converter circuit. The voltage converter circuit comprises: a first output circuit that outputs a first output voltage obtained by multiplying a potential of the first terminal with respect to a predetermined reference potential by a conversion gain; a second output circuit that outputs a second output voltage obtained by multiplying a potential of the second terminal with respect to the reference potential by a conversion gain; and a third output circuit that outputs a third output voltage obtained by multiplying a voltage between the first terminal and the second terminal by a conversion gain.The conversion gains of the first output circuit, the second output circuit, and the third output circuit can be set to values ​​of at least one first group and one second group, and the ratio between a first group conversion gain and a second group conversion gain set in the third output circuit differs from the ratio between a first group conversion gain and a second group conversion gain set in the first output circuit or the second output circuit.The computing device comprises the following: a voltmeter which measures the first output voltage, the second output voltage and the third output voltage, and a diagnostic unit which, using conversion gains of a selected group, which is one of the first group and the second group, calculates a first conversion value, a second conversion value and a third conversion value corresponding to input voltages of the first output circuit, the second output circuit and the third output circuit, based on the first output voltage, the second output voltage and the third output voltage, and determines that an anomaly exists if the sum of the first conversion value and the second conversion value deviates from the third conversion value by at least one predetermined value.

The application provides a voltage converter. The voltage converter comprises a primary circuit, a secondary circuit and a discharge control unit. The secondary circuit comprises a first MOS tube and an output capacitor. The first MOS tube is connected with the discharge control unit. The discharge control unit is used for controlling the first MOS tube to work in a linear region when the voltage converter is in a shutdown state or an abnormal protection state. In the technical scheme, after the voltage converter stops working, the first MOS tube is controlled to work in the linear region, so that the first MOS tube consumes the residual voltage on the output capacitor in the voltage converter as a resistance. In this way, when the voltage converter is started, the pre-bias voltage is reduced or disappears, so that an excessively large reverse current is avoided, and thus the failure of components in the voltage converter is avoided.

This application provides a voltage converter and a power supply system. In one example, a voltage converter includes a voltage conversion circuit and a controller. The voltage conversion circuit is configured to receive an input voltage from a power supply, and perform buck conversion on the input voltage to obtain an output voltage, to supply power to a load. The controller is configured to: when the voltage conversion circuit is in a first state, control the output voltage by controlling a level conduction signal of the voltage conversion circuit, to supply power to the load. The first state is a state in which a value of a duty ratio of the voltage conversion circuit is greater than or equal to a preset duty ratio value. The first state includes a first saturation state and a second saturation state.

A control device for a battery electric vehicle is used in a battery electric vehicle, and is configured to control a drive circuit, a voltage converter, and first and second relays. In the case where the control device controls, with the second relay controlled to turn off, the drive circuit and the first relay such that the voltage of the first capacitor changes, the control device determines that the second relay is stuck when the voltage on the connection line at a position closer to the voltage converter than the second relay changes following the voltage of the first capacitor. Sticking of the second relay can thus be determined.

To enable the diagnosis of an amplification fault during the execution of normal control of a rotating electric machine, a voltage detection circuit 1, which detects an input voltage applied between two terminals, comprises a voltage converter circuit 115, a switching unit 102, and a diagnostic circuit 100. The voltage converter circuit 115 converts the input voltage with a predefined amplification and outputs the converted input voltage. The switching unit 102 switches a voltage applied to the voltage converter circuit 115 between the input voltage and a diagnostic-time input voltage. The diagnostic circuit 100 diagnoses an amplification fault of the voltage converter circuit based on a diagnostic-time output voltage, which is output by the voltage converter circuit 115 during a diagnostic period while the diagnostic-time input voltage is applied.During the diagnostic period, the voltage converter circuit 115 outputs a normal-time output voltage, which is output by the voltage converter circuit that received the input voltage applied immediately before the diagnostic period, in addition to the diagnostic-time output voltage.

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.

The utility model discloses an electronic component identification and detection practical training device, which comprises a box body, two opposite sides of the box body are respectively provided with a bottom plate and a power adapter, the top of the box body is provided with a box cover, the bottom plate is provided with a circuit board provided with various components, and the power adapter is provided with a power adapter. The power adapter is an alternating current-direct current voltage converter connected with external alternating current voltage, and the direct current output end of the power adapter is electrically connected with a power terminal of the circuit board and supplies direct current to various components on the circuit board. The electronic component training device is used for helping a user to learn type classification and identification, physical packaging size, basic functions, basic parameter measurement methods and polarity / direction judgment of conventionally used basic electronic components, is a practical training device meeting user requirements, and can be widely applied to the teaching field.

We provide a power supply module that is easy to handle and can be implemented at a low cost. [Solution] The power module 1 mounted on a vehicle includes an AC / DC converter 11 that converts one of AC voltage and DC voltage to the other and outputs it, and a voltage converter 20 that converts a first voltage value of an input DC voltage to a DC voltage of a second voltage value. The voltage converter 20 includes a first converter 21 connected to the AC / DC converter 11 and a second converter 23 connected to the first converter 21 via a transformer 22. The power module 1 includes a first circuit board 81 on which the AC / DC converter 11 and the first converter 21 are provided, and a second circuit board 82 which is different from the first circuit board 81 and on which the second converter 23 is provided.

Energy supply system (100) with: - a first battery (20); - a second battery (23); - a voltage converter (10) with several switching elements (31, 32, 33, 34), wherein the switching elements (31, 32, 33, 34) are designed to bidirectionally convert a voltage between the first battery (20) and / or the second battery (23) and an output line (26) and to switch a connection between the first battery (20) and the second battery (23) to the output line (26) between a series and a parallel connection; and - a controller (60) designed to switch the multiple switching elements (31, 32, 33, 34) on or off in accordance with pulse width modulation control, wherein - the output line (26) has a first electrical line (12) and a second electrical line (11) of lower potential than the first electrical line (12), - the multiple switching elements (31, 32, 33, 34) have a first, second, third and fourth switching element (31, 32, 33, 34) which are connected in series from the first to the second electrical line (12, 11), - the first battery (20) is connected in parallel to the third and fourth switching elements (33, 34), - the second battery (23) is connected in parallel to the second and third switching elements (32, 33), - the controller (60) then, if a total high-level period, which is a total period of a first high-level period and a second high-level period, is shorter than a duty cycle period, is designed to control phases of pulse-width modulation control signals such that the first high-level period and the second high-level period do not overlap, in order to reduce noise by bringing the frequency of the electromagnetic noise of the voltage converter outside the range audible to humans, wherein the first high-level period is a high-level period of a first pulse-width modulation control signal for controlling a first voltage conversion of a first voltage conversion circuit formed between the first battery (20) and the output line (26),the second high-level period is a high-level period of a second pulse-width modulation control signal for controlling a second voltage conversion of a second voltage conversion circuit formed between the second battery (23) and the output line (26), and the duty cycle period is a total period of low-level periods of the pulse-width modulation control signals and a corresponding number of high-level periods of the pulse-width modulation control signals.

The application discloses a high-side power tube driving circuit and method applied to a 4:1 switched capacitor voltage converter. The internal node voltage of the switched capacitor voltage converter with an input-output voltage conversion ratio of 4:1 is utilized to change in the switching action process, three bootstrap capacitors and two power sources VIN and REGN are used to drive four high-side power tubes in the voltage converter by controlling the switching sequence, and the source following structure is avoided, so that the chip cost area can be saved, the power consumption is reduced, and the chip conversion efficiency is improved on the basis of ensuring high reliability.

This application provides a neural network system and a neural network calculation method, relating to the field of electronic technology, which can save chip area and power consumption. The neural network system includes a first memristor array, multiple current-to-voltage converters, and multiple resistive random access memories (RRAMs). The first memristor array includes multiple rows and columns of memristors for receiving first input data and performing multiplication and addition operations on the first input data according to configured first weights to obtain current. Each current-to-voltage converter is connected to the output terminal of at least one column of memristors in the first memristor array, for receiving the current of the corresponding column of memristors and converting the received current into voltage. Each RRAM is connected to at least one current-to-voltage converter, for receiving the voltage of the corresponding current-to-voltage converter, and obtaining one of the calculation results from the first calculation results based on the received voltage and the initial resistance state of the corresponding RRAM. The initial resistance state of each RRAM is a high resistance state.

A battery management device according to one embodiment of the present application includes a measurement unit for measuring a voltage of each of a plurality of battery cells, a converter connected to a corresponding battery cell among the plurality of battery cells and forming a charging or discharging path between the connected battery cells according to an operation state of a switch provided therein, and a control unit for receiving a voltage value of each of the plurality of battery cells from the measurement unit, controlling the operation state of the switch provided in the converter, calculating a voltage change rate of a cell charged by the converter according to the control of the operation state of the switch, and determining whether the charged cell is deteriorated based on the calculated voltage change rate.

The invention relates to an electric drive arrangement (1) for a vehicle, comprising a first high-voltage battery (2) and a second high-voltage battery (3) each with two terminals, at least one inverter (5) with two terminals connected to the first high-voltage battery (2), and an electric machine (6), wherein the first high-voltage battery (2) has a higher DC voltage than the second high-voltage battery (3), wherein a voltage converter (10) is arranged which is connected to the first high-voltage battery (2) and to which one of two terminals of the second high-voltage battery (3) is connected via a choke (L4), wherein the same terminal of the second high-voltage battery (3) is further connected via a switching element (12) to a star point (11) of the electric machine (6), wherein a second terminal of the second high-voltage battery (3) is connected to one of the terminals of the first high-voltage battery (2).

A voltage converter includes a conversion circuit having an inductor connected to a switching node, a first switching element connected between the switching node and a ground voltage, and a second switching element connected between the switching node and an output node, and a switching control circuit configured to adjust a feedback voltage divided from an output voltage of the output node based on a current state of the inductor, and configured to generate a switching control signal based on a sense signal according to a current of the inductor and the adjusted feedback voltage, for charging the inductor with an input voltage and discharging a voltage charged in the inductor.

A system includes a housing defining an interior space surrounded by walls of the housing. The power electronics are disposed within the interior space. The power electronics may include at least one inverter configured to invert direct current (DC) power to alternating current power, at least one voltage converter for boosting a voltage from a DC source to an electrical panel voltage, at least one rectifier configured to rectify alternating current (AC) power to DC power, and at least one voltage converter for reducing the voltage from the electrical panel voltage to the battery charge level. A wall mounting feature may extend from the housing configured for mounting the housing to a wall surface. It may also be contemplated that the hinge member may extend from a wall of the housing such that the housing may be hingedly mounted to the electrical panel as a door for the electrical panel.

The charging system provides a complete disconnection of the battery and the voltage converter located within the voltage conversion unit from the supply terminals using three disconnectors. [Solution] The charging system for the battery of an electric vehicle comprises a voltage conversion unit 3 and a storage unit 4, the storage unit supplying electrical energy via two supply terminals 44 and 45. The battery 48 of the storage unit has two terminals 481 and 482 and is disconnectably connected to the supply terminals via second and third disconnectors 46 and 47. The voltage conversion unit is connected to the storage unit via three terminals 31, 32 and 33, two of the three terminals 32 and 33 within the storage unit are connected to two terminals of the battery. The third terminal 31 of the three terminals is connected to the first terminal 41 of the storage unit and is connected to the first disconnector 36 within the voltage conversion unit.

The present disclosure proposes an apparatus (110) for powering an electrical grid (120) of an aviation propulsion system (100), the apparatus (110) comprising: a generator (112), preferably a permanent magnet synchronous machine, comprising a rotor and a stator, the rotor being configured to be driven by a turbine engine (111), the stator being configured to generate a first AC voltage (V1); an AC / DC converter (114) configured to rectify a first voltage (V1) transmitted by the generator (112) to obtain a second voltage (V2); and a DC / DC converter (116) configured to chop a second voltage (V2) delivered by the AC / DC converter (114) to obtain a third voltage (V3), with reference to a current flow from the AC / DC converter (114) to the DC / DC converter (116), the DC / DC converter (116) being located downstream of the AC / DC converter (114).

This invention provides a voltage converter and a circuit system using the same, the voltage converter having a switch, a latch, and a voltage clamping circuit. The switch receives an input signal and opens or closes according to the input signal. The latch receives a power supply voltage. The voltage clamping circuit has a first node, a second node, and a third node, the first node being electrically connected to an output terminal of the latch for outputting an output signal, the second node being electrically connected to another output terminal of the latch along with the switch, and the third node being a voltage follower node of the second node. Compared to the prior art, the voltage converter of this invention requires only a single power supply to operate, and the output signal is not unknown when the power supply is first turned on.