180 results about "Voltage controller" patented technology

Disclosed is a system for zero voltage switching in a power converter with a first half-bridge and a second half-bridge. The first half-bridge has a first set of transistors and output inductor. The second half-bridge has a second set of transistors and auxiliary inductor. A current sensing means measures, at switching cycle scale, average and maximum current values of output inductor and average, minimum and maximum current values of auxiliary inductor. A voltage sensing means measures input and output voltages of first and second half-bridge. A controller is configured to compute dead times of pulse width modulation control signal of second half-bridge, generate pulse width modulation control signal of second half-bridge and to adapt dead times of first half-bridge.

Apparatuses, systems, and methods are described for providing a sensor device. The system includes a control unit and a sensing unit. The sensing unit is coupleable to the control unit via a current loop and includes an input terminal coupleable to the current loop, at least one energy storage unit configured to be charged to a first voltage from the input terminal, a sensing element configured to sense an environmental parameter, wherein the sensing element receives power from the at least one energy storage unit at a second voltage, and wherein the second voltage is lower than the first voltage, a controller configured to receive a sensor signal from the sensing element and to generate an output signal, and an output terminal coupleable to the current loop and configured to transmit output corresponding to the output signal to the control unit via the current loop.

The present disclosure relates to a power supply, a light emitting display apparatus, and a driving method thereof. The light emitting display apparatus can include a display panel configured to display an image, a driver configured to drive the display panel, and a power supply configured to supply a high-level voltage to a first power line of the display panel. Further, the power supply includes a voltage controller configured to perform the steps of receiving a vertical synchronization signal and current amount information of the high-level voltage for driving the display panel from the driver, and boosting the high-level voltage to be supplied to the display panel during a vertical blanking period based on the vertical synchronization signal and the current amount information of the high-level voltage.

The invention discloses a micro-grid group control method and device, computer equipment and a computer program product. The method comprises the following steps: selecting a distributed power supply meeting a preset condition from a target microgrid group as a fixed distributed power supply corresponding to each of a plurality of microgrids; constructing a sparse communication network based on the fixed distributed power supplies corresponding to the plurality of micro-grids; based on a preset droop control algorithm, controlling a plurality of distributed power supplies corresponding to the plurality of micro-grids, and based on the sparse communication network, collecting distributed power supply control data; setting a distributed secondary frequency device and a distributed secondary voltage controller based on a preset time consistency algorithm and distributed power supply control data; and controlling the target microgrid group based on the distributed secondary frequency device and the distributed secondary voltage controller. According to the method, the technical problem that the real-time requirement of the micro-grid group on rapid coordination control cannot be met due to slow convergence speed of coordination control of the micro-grid group at present is solved.

A power amplification system is provided herein. In certain embodiments, the power amplification system comprises: a power amplifier configured to amplify an input radio frequency (RF) signal to generate an output RF signal when powered by a supply voltage and biased by a biasing signal; an envelope tracker configured to generate an envelope signal that changes in relation to an envelope of the input RF signal; a mode controller configured to set an envelope tracking (ET) mode of the power amplification system based on a modulation bandwidth of the input RF signal; a supply voltage controller configured to control the supply voltage based on the envelope signal when the ET mode is set to a first mode; and a bias controller configured to control the biasing signal based on the envelope signal when the operation mode is set to a second mode.

A controller for a switched modulator receives an input voltage and generates a regulated output voltage. The controller activates a buck control circuit to generate a regulated output voltage having a first voltage value less than the input voltage. The controller activates a boost control circuit to return charge stored on an output capacitor at an output node to an input node to drive the regulated output voltage to a second voltage value lower than the first voltage value. In some embodiments, in response to a command indicating that the controller is to allow the output voltage to decay, the controller operates in a boost mode, using the boost control circuit to circulate the stored charge at the output node while reducing the output voltage.

The present invention relates to a method and system for identifying the wiring configuration and voltage rating of an electricity meter. The method involves measuring various voltage values, including phase and line voltages, relative to a virtual neutral point. A controller calculates effective values and phase angles from the measured voltages and performs a multidimensional analysis, including voltage ratio analysis, phase angle analysis, and zero-sequence voltage analysis, to determine the wiring configuration, such as a three-phase three-wire or three-phase four-wire configuration. The method also incorporates a voltage spectrum analysis, utilizing a Fast Fourier Transform (FFT), to determine the voltage rating. Multiple iterations of the identification process are performed to confirm the accuracy of the results. The system includes a voltage measurement unit, a processor, and a memory for executing the method. The invention improves reliability in wiring configuration identification and enables anomaly detection.

The application relates to the technical field of circuit protection, in particular to a transient overvoltage protection device with active isolation and reconstruction functions, and discloses a system named a transient overvoltage protection device with active isolation and reconstruction functions, which aims to solve the problems of single-point failure and protection interruption caused by performance degradation of metal oxide varistors. The device comprises a main / auxiliary discharge path, a state sensing module and a central cooperative controller; by monitoring the leakage current, temperature and clamping voltage in real time, the controller actively turns off the main path before the element deteriorates and switches to the standby path in milliseconds, so that the reconstruction is realized without disturbance. The scheme ensures that the protection function is continuously effective, and significantly improves the system resilience and power supply safety.

Control procedure for a fuel cell system, comprising: Deriving, by means of a control, a voltage of a fuel cell stack (10) by charging a high-voltage battery (220); Deriving, by control, the voltage of the fuel cell stack (10) by connecting a fuel cell load device (20) to the fuel cell stack (10) when the voltage of the fuel cell stack (10) is less than a predetermined first reference voltage (V1) when the voltage is derived, wherein the fuel cell load device (20) is a load to discharge a voltage of a fuel cell when starting up or switching off the fuel cell; Adjusting, by means of the control, a voltage of a main bus connection (211) arranged between the fuel cell stack and an inverter (231) to an acceptable minimum voltage (V3) in order to prevent the output power of the fuel cell stack (10) from being supplied to loads other than the fuel cell load device (20) until a voltage of the fuel cell stack (10) reaches a predetermined second reference voltage (V2) based on the connection with the fuel cell load device (20); Diagnosing, by control, an operation of the connected fuel cell load device (20); the diagnosis of the operation of the fuel cell load device (20) includes: Diagnosing, by controlling, the operation of the fuel cell load device (20) based on a rate of decrease of the voltage of the fuel cell stack (10), wherein diagnosing the operation of the fuel cell load device (20) based on the rate of decrease of the voltage of the fuel cell stack (10) includes: Diagnosing, by controlling, the operation of the fuel cell load device (20) based on both a time required for the voltage of the fuel cell stack (10) to reach a certain voltage after the fuel cell load device (20) is connected to the fuel cell stack (10), and on a reference time required for the voltage of the fuel cell stack (10) to reach the certain voltage under normal operation of the fuel cell load device (20), wherein the reference time varies based on a vehicle speed, an amount of air inflow, a water content of the fuel cell stack (10), a crossover state within the fuel cell stack (10) and the voltage of the fuel cell stack (10) when the fuel cell load device (20) is connected to the fuel cell stack (10).

This application provides a power supply device and a power supply system. The power supply device includes a motherboard module and a board module. The motherboard module includes a power module, a controller, and at least one first control signal connector mounted on the motherboard. The board module includes a voltage input connector, at least one second control signal connector, and at least one power module mounted on the board. The power module is connected to the input terminal of the at least one power module through the voltage input connector, and is used to provide power supply voltage to the at least one power module through the voltage input connector. The controller is connected to the at least one power module through at least one first control signal connector and at least one second control signal connector, and is used to input control signals to the at least one power module. The control signals are used to control the power module to output a preset value of output voltage. The structure of this application can provide voltage to the device to be powered.

The invention discloses a virtual synchronous generator control method for improving power transmission capability, which is characterized in that the traditional virtual synchronous generator control is composed of a power outer loop and an inner loop formed by voltage and current double closed loops. A reference voltage generated by a power outer loop subtracts a grid-connected point voltage and then is input into a current feed-forward compensation calculation module to generate a current feed-forward compensation value, the current feed-forward compensation value is superposed on a current given value output by a voltage controller, and the superposed value is used as a total current given value of a current controller. Compared with traditional virtual synchronous generator control, the method has the wide-range adaptive capacity of power grid impedance, and the limit power transmission capacity of active power of a grid-connected inverter can be remarkably improved.

A system includes an analog-to-digital converter (ADC), a current source, and a controller. The ADC includes a comparator having a first input and a second input, and the current source includes an operational transconductance amplifier. The controller is configured to configure the operational transconductance amplifier with a first set of conductances; and use the current source to set a DC voltage at the first input. The controller is further configured to reconfigure the amplifier with a second set of conductances; and enable the comparator and use the current source to create a voltage ramp at the second input.

A system and method for providing nonlinear control of a generator, comprising: a linear voltage controller and a nonlinear current controller, wherein the linear voltage controller is implemented on a microcontroller to perform: determining a reference angle for an output voltage from a first generator using a phase-locked loop; converting the reference angle and the generator output voltage from the time domain to an orthogonal reference system to generate two rotating coordinate system reference voltages; calculating the root mean square voltages of the two rotating coordinate system reference voltages and converting the root mean square voltages into an output current IfSet1; providing IfSet1 to the nonlinear current controller; and wherein the nonlinear current controller determines a control action based on the difference between IfSet1 and the output current IfFBK of a second generator.

A voltage controller (204) detects (604) a voltage spike (244) in an electrical signal received from an electrical power source (208). The voltage controller (204) is implemented using a single-loop control system in a stationary reference frame. The electrical signal includes voltage harmonics caused by a non-linear or unbalanced load (256). The voltage controller (204) includes a phase-compensated harmonic regulator (220) that regulates the voltage harmonics present in the electrical signal and receives a feedback voltage (240) of the single-loop control system. The feedback voltage (240) is a delayed version of an instantaneous voltage (236) of the electrical signal. The instantaneous voltage (236) is sub-transiently stabilized into a steady-state voltage (232) based on the feedback voltage (240). Sub-transiently stabilizing the instantaneous voltage (236) is performed within a single cycle after the voltage spike (244) is detected (604). The steady-state voltage (232) has a total harmonic distortion less than a threshold total harmonic distortion and the steady-state voltage has a balanced sinusoidal waveform.

The invention provides a high-stability control method for a power grid simulator, and the method comprises the steps: embedding a virtual impedance feature Zvirref (s) in an integral controller of a voltage controller module, and forming a controller structure of Ki * Zvirref (s) / s; and dynamically adjusting the integral gain Ki according to the virtual impedance generated by the power grid simulator and the physical impedance provided by the impedance network B so as to meet the condition that the amplitude of the virtual impedance is not higher than the amplitude of the physical impedance in the frequency range in which the virtual impedance is presented to be non-passive. Decoupling between internal control dynamic and virtual impedance characteristics of the power grid simulator is realized, and the self-stability of the power grid simulator under different impedance simulation conditions is ensured; the self-adaptive adjustment of the closed-loop transfer function of the power grid simulator is realized, the virtual impedance and the physical impedance are ensured to meet the Nyquist stability criterion, and the interaction stability between the power grid simulator and the tested object is improved.

A water-quality detection apparatus includes a detection chamber device, a pump module, a light source, a light sensor and a controller. The pump module is configured to transport a to-be-tested liquid and a reagent to a detection chamber of the detection chamber device. The light source emits detection light to the detection chamber. The light sensor senses the detection light traveling through the detection chamber and generates a detection voltage. The controller performs the following procedures: a voltage sensing procedure, a dilution determination procedure, a dilution procedure and a concentration acquisition procedure. The dilution determination procedure may calculate a voltage ratio between the detection voltage value and a basic-voltage value. When the voltage ratio is greater than a critical value, the concentration acquisition procedure is performed. When the voltage ratio is not greater than the critical value, the dilution procedure is performed.

The invention relates to an LCC-MMC extra-high-voltage direct-current transmission line fault restarting method and an extra-high-voltage direct-current transmission system, and belongs to the technical field of extra-high-voltage direct-current transmission. When a line fault is detected, the LCC converter station controls the fault current to a direct current reference value; the MMC converter station controls the sub-module voltage to a rated value, the outer loop control output is switched to the sub-module voltage controller output, the direct current bias part of the direct current voltage reference value is switched to the direct current controller output, and the direct current reference value is the direct current reference value; after the deionization time is over, the DC bias part of the MMC converter station rises to a reference value, and the constant current control is quitted at the same time; when the current converter port voltage is detected to be greater than the starting value, the sub-module voltage control is quitted, and the outer loop control output is switched to the direct current voltage controller output; and the LCC converter keeps a current control mode, and when the DC voltage is detected to be greater than a completion value, the LCC converter station switches the current reference value to a real-time current reference value, and the line fault restart is completed.

The application provides a unilateral detection system and a vehicle. The unilateral detection system comprises a voltage dividing circuit, an amplification circuit, an isolation circuit, an output circuit and a controller. The voltage dividing circuit divides the voltage of a high-voltage DC bus to obtain a first output voltage. The amplification circuit is connected with the voltage dividing circuit. The isolation circuit is connected with the amplification circuit and the voltage dividing circuit. The output circuit comprises a first operational amplifier and a first resistor. The non-inverting input terminal of the first operational amplifier and one end of the first resistor are connected with the sixth terminal of the isolation circuit. The inverting input terminal of the first operational amplifier is connected with the output terminal of the first operational amplifier. The other end of the first resistor is grounded. The first operational amplifier generates a second output voltage. The controller determines the voltage of the high-voltage DC bus based on the second output voltage. The system can monitor the voltage of the high-voltage DC bus in isolation, so as to discover abnormal conditions of the voltage in time. The system has high safety in use due to the isolation circuit.

This switch mode control circuit comprises: a battery link configured to be connected to a battery; a capacitor link configured to be connected to a capacitor; and a precharge circuit connected in series between the battery link and the capacitor link and configured to limit an inrush current to the capacitor during initial power connection. The precharge circuit includes: a switching mechanism configured to switch between an open state and a closed state; a shunt resistor that monitors current; and a controller operably connected to the switching mechanism and configured to control a duty cycle of the switching mechanism. The controller dynamically adjusts the duty cycle of the switching mechanism by intermittently closing the switching mechanism until a certain voltage is reached, and when the certain voltage is reached, the controller maintains the switching mechanism in the closed state such that a continuous direct current flows from the battery to the capacitor.

The utility model is applicable to the field of wiring of hydrogen energy city trains, and provides a hydrogen energy city train pipeline arrangement structure, which comprises a hydrogen energy system circuit arranged at the top of a train, and is characterized in that in a hydrogen energy city train in a grouping form of two trains, two trailers and four trains, a Tc train is provided with two sets of energy storage systems and air conditioning systems; the M vehicle is provided with two sets of hydrogen energy systems, energy storage systems and air conditioning systems; the hydrogen energy system circuit comprises a low-voltage control system, a three-phase alternating current system and a high-voltage circuit system; the three parts comprise a connector and a connector wire harness; the connector comprises a low-voltage controller, an alternating-current bus and a high-voltage power supply connector; the connector wire harness comprises low-voltage control, alternating-current and high-voltage wire harnesses. Therefore, according to the utility model, the scientificity and rationality of the whole pipeline arrangement structure can be ensured, and the problems of equipment arrangement and wiring caused by the reason that the equipment of the hydrogen power train cannot be miniaturized and lightened and the space under the train is saturated are effectively solved.

A system is provided that includes a diode bridge for rectifying an AC input voltage. A main switching power converter converts a rectified input voltage of the diode bridge to an output voltage. The flyback converter is coupled to the pre-bridge node or the post-bridge node to receive an input voltage that is converted to a supply voltage for the controller integrated circuit. The controller integrated circuit regulates both the output voltage and the supply voltage.

The application discloses a multi-node server power-on system, a control method and a multi-node server, relates to the technical field of server power supply, and the system comprises a plurality of nodes, each node comprises a power-on controller, a communication interface, a voltage controller, a power consumption monitoring module and the like, the power-on controller responds to a power-on signal, obtains first power consumption data of a current node through the power consumption monitoring module, and obtains second power consumption data of an adjacent node through the communication interface; whether the current node meets a preset power-on condition is determined according to the first and second power consumption data; when the power-on condition is met, a power-on sequence is generated; and the voltage controller is controlled according to the power-on sequence to power on a load. Therefore, the nodes of the system are linked through the power-on controller, the communication interface and other modules, the power-on condition is determined in combination with the power consumption data of the nodes and the adjacent nodes, and the power-on sequence is generated, so that the orderly power-on of the load is realized, the power impact of the centralized power-on of the load is reduced, and the energy utilization efficiency and the operation stability are improved.

A wireless power supply system includes: an AC power source apparatus; a plurality of power transmission apparatuses connected in parallel to the AC power source apparatus; a power receiving apparatus configured to be supplied with power from the power transmission apparatuses in a wireless manner; and a power source voltage controller configured to control an output voltage of the AC power source apparatus, in which in a case where an output power of the AC power source apparatus exceeds a rated output power, the power source voltage controller is configured to perform a primary-side power reduction control to lower the output voltage so that the output power falls below a preset allowable output power.

The present application relates to a semiconductor device, a motor drive system, and a method of starting a motor. A rotor magnetic pole position is estimated with high accuracy at the time of initial start of a three-phase motor of a sensorless system. A semiconductor device for driving and controlling a three-phase motor of a sensorless system has a detector connected to three-phase output nodes and a virtual neutral point (or neutral point) of an inverter circuit, and detects a voltage generated in the output node of a non-energized phase among the three phases. A controller applies an initial drive voltage to any two phases of the three-phase motor through the inverter circuit based on the estimated magnetic pole position of the rotor in a stopped state. The controller estimates the position of the rotor based on a differential voltage detected by the detector in a drive voltage application period and in a regeneration period immediately after or before the drive voltage application period.

Semiconductor devices, systems and methods are described. A system can include a controller configured to generate a control signal, a power module and a gate driver. The gate driver can be configured to drive the power device according to the control signal. The gate driver can be further configured to measure a voltage across a source wire of the power device. The gate driver can be further configured to output the voltage across the source wire to the controller. The controller can be further configured to determine, based on at least the voltage across the source wire, an overshoot voltage associated with the power device. The controller can be further configured to determine, based on at least the overshoot voltage, a peak drain-source voltage of the power device. The controller can be further configured to adjust the control signal based on the determined peak drain-source voltage.

A first inverter unit receives an input DC voltage and converts the input DC voltage into a first AC voltage based on a first manipulated variable. A second inverter unit converts the input DC voltage into a second AC voltage based on a second manipulated variable. A further circuit part generates the high tube voltage based on the first and second AC voltages. A controller determines a controlled variable, and changes the first and / or the second manipulated variable based on the controlled variable. The controlled variable is based on a first alternating current resulting from the first AC voltage and a second alternating current resulting from the second AC voltage, and / or a first direct current resulting from the input DC voltage at the first inverter unit and a second direct current resulting from the input DC voltage at the second inverter unit.

Method and systems for determining a battery electric vehicle (BEV) protection plate has been damaged. A BEV protection plate includes a circuit. The circuit includes a plurality of conductive tabs. The BEV protection is separated from a battery housing by an opening. The conductive tabs extend from the circuit disposed on the BEV protection plate into the opening. A diagnostic device measures a voltage of the battery housing. A controller is in communication with the diagnostic device, determines a short circuit based on the measured voltage of the battery housing; and outputs to a display a notification that the BEV protection plate is compromised.

The invention discloses an electrochemical mechanical polishing tool and method for pressure and voltage partition regulation and control, the tool comprises a polishing head and a loading driving mechanism, and the polishing head is a partition pressurizing and electrifying polishing head. A partition pressurizing and electrifying polishing head and an external control mechanism are integrated, the partition pressurizing and electrifying polishing head is connected with all components through a loading air cylinder, and an overall partition control polishing tool is driven to feed; an air pressure controller of an external control mechanism can adjust the pressure of the air bags in different areas, and a voltage controller is used for connecting different voltages to the corresponding bottom plates. During operation, a wafer is adsorbed in a vacuum mode through the air bag and is accurately fed, then pressure and voltage of all areas are synchronously regulated and controlled according to the gradient that the middle is high and the outer ring is low, and machining is completed in cooperation with rotation of the polishing head. According to the method, accurate matching of the polishing rates of different areas of the wafer is achieved, and the surface precision, the production efficiency and the qualified rate of finished products of electrochemical mechanical polishing are greatly improved.

The utility model discloses an all-in-one high-voltage controller and a vehicle, and the all-in-one high-voltage controller comprises an electromagnetic compatibility filter, a bus capacitor, a power distribution unit, a motor controller driving module, a vehicle-mounted charger, a DC-DC converter driving module, and a main control module which are fixedly disposed in a vehicle-mounted battery pack. The main control module comprises a whole vehicle controller, a motor controller control unit, a vehicle-mounted charger and a direct current-direct current converter control unit. The electromagnetic compatibility filter, the bus capacitor, the power distribution unit, the motor controller driving module, the vehicle-mounted charger, the DC-DC converter driving module and the main control module are all integrated in the vehicle-mounted battery pack, so that all the components can share part of structural parts and cooling waterways; the volume utilization rate and the power density of the system are improved, the lengths of a high-voltage wire harness, a copper bar, a cooling pipeline and a power supply line required by the high-voltage system are reduced, and the cost is greatly reduced.

This invention relates to an on-board charger control device and method for vehicles, and a system including the control device. The on-board charger control device includes: a measuring device that measures the voltage of each phase of a three-phase OBC; and a controller that calculates the impedance of each phase using the voltage of each phase. The voltage is measured before charging begins in the three-phase OBC. The controller also calculates the amount of charge in each phase, which corresponds to the impedance of each phase, and adjusts the charging based on the calculated amount of charge in each phase.