319 results about "Voltage controller" patented technology

This application relates to methods and apparatus for switched mode drivers. A BTL driver has a switch network operable in different switch states, wherein, in each switch state, each of first and second output nodes is connected to a respective one of a first switching voltage, a second switching voltage or an intermediate switching voltage between the first and second switching voltages which is provided by a driver capacitance. A controller is configured to control the switch network to operate in a sequence of switch states to generate a differential drive signal based on an input signal. The controller is configured such that operation of driver switch network in said sequence of switch states to generate said differential drive signal provides voltage regulation of the intermediate voltage provided by said driver capacitance.

The invention discloses an integrated circuit source measurement unit control method for improving a raccoon algorithm and optimizing fuzzy PID. The method comprises the steps that an output voltage control system of an SMU is set up; acquiring output end voltage data of the SMU system in real time; calculating a voltage error and a voltage error change rate; a fuzzy inference rule base is constructed, fuzzy controller parameters are dynamically adjusted based on the fuzzy rule base according to the voltage deviation value and the voltage error change rate, and then PID parameters are dynamically adjusted; a control signal is generated according to the set PID parameter, and the output voltage of the SMU is adjusted; and S4, optimizing the fuzzy PID voltage controller obtained in the step S4 by adopting an improved raccoon algorithm, selecting a decision variable as a parameter of a fuzzy controller, and assigning the optimized parameter to the fuzzy PID voltage controller to realize control on the output voltage of the SMU. According to the invention, the improved raccoon optimization algorithm and the fuzzy PID controller are combined and applied to the integrated circuit source measurement unit, so that the control performance of the SMU system is improved.

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 discloses an island micro-grid voltage frequency control method and system based on deep reinforcement learning, and the method comprises the steps: S1, building a mathematical model of a distributed power supply grid-connected inverter in an island micro-grid, employing droop control as an inverter control strategy, and building a voltage and current double-closed-loop model based on droop control; s2, designing a secondary voltage controller based on a deep Q network algorithm based on the mathematical model established in S1; s3, designing a secondary frequency controller based on a DQN algorithm based on the mathematical model established in S1 and the secondary voltage controller in S2; and S4, establishing an island micro-grid model containing multi-distributed power supply access, and embedding the voltage controller and the frequency controller trained in the S2 and the S3 into the island micro-grid for online application so as to realize voltage and frequency control of the island micro-grid. The method has the advantages of eliminating voltage and frequency deviation and the like.

This application relates to methods and apparatus for switched mode drivers. A BTL driver has a switch network operable in different switch states, wherein, in each switch state, each of first and second output nodes is connected to a respective one of a first switching voltage, a second switching voltage or an intermediate switching voltage between the first and second switching voltages which is provided by a driver capacitance. A controller is configured to control the switch network to operate in a sequence of switch states to generate a differential drive signal based on an input signal. The controller is configured such that operation of driver switch network in said sequence of switch states to generate said differential drive signal provides voltage regulation of the intermediate voltage provided by said driver capacitance.

The invention relates to the field of performance testing of high-precision fiber-optic gyroscopes, and discloses an automatic testing method and system for the extinction ratio of a high-precision fiber-optic gyroscope, and the method comprises the following steps: constructing a signal light path and a reference light path, and combining the output light of the signal light path and the reference light path into a combined light signal in an orthogonal polarization state; integrally measuring the extinction ratio of the combined optical signal by using an extinction ratio tester to obtain a measured value; the control unit compares the measured value with a target value of 0dB and generates a control instruction based on a difference value; the voltage controller automatically adjusts the voltage of the integrated optical modulator in the signal light path according to the instruction, and iterative optimization is carried out through closed-loop feedback until the actually measured extinction ratio reaches a target value; and finally recording and solidifying the optimal voltage value. According to the invention, single and accurate extinction ratio overall measurement is used for replacing two times of error-prone independent optical power measurement, full-automatic closed-loop control is realized, the precision, efficiency and consistency of optical power balance are remarkably improved, and the skill requirements on operators are reduced.

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.

The invention relates to an expandable distributed voltage controller, and relates to the technical field of power grid electric energy management, the expandable distributed voltage controller comprises a series-parallel module comprising a parallel converter, a first series converter, a first DC capacitor and an isolation transformer, the DC side of the parallel converter is connected with the DC side of the first series converter through the first DC capacitor, and the DC side of the first series converter is connected with the isolation transformer through the isolation transformer; the alternating current side of the series converter is connected in series to the power grid side through the isolation transformer; and the series connection module comprises a second series connection converter, a second direct current capacitor and an isolation transformer, the second direct current capacitor is arranged on the direct current side of the second series connection converter, and the second series connection converter is connected to the load and / or the grid connection position in series through the isolation transformer. A plurality of problems can be solved while the power quality problem of the power grid is governed, so that the application range is wider.

An analog-to-digital converting device includes a capacitive digital-to-analog converter, a comparator, and a controller. The capacitive digital-to-analog converter respectively generates a first and a second sample voltage according to a non-inverting output voltage and an inverting output voltage of a programmable gain amplifier during a sample period. The comparator generates a comparing signal by comparing the first and the second sample voltages during a converting period. The controller controls the capacitive digital-to-analog converter to generate a converting voltage according to the comparing signal during the converting period. The controller controls the capacitive digital-to-analog converter such that the capacitive digital-to-analog converter is pre-charged to a pre-charge voltage during a pre-charge period. The pre-charge voltage is between a maximum value and a minimum value of the non-inverting output voltage and the inverting output voltage of the programmable gain amplifier.

An analog neuromorphic circuit is disclosed having a first and a second memristor crossbar configuration implemented into an autoencoder. The first memristor crossbar configuration includes resistive memories that provide resistance values to each corresponding input voltage applied to the first memristor crossbar configuration to generate first output voltages that are compressed from the input voltages. The second memristor crossbar includes resistive memories that provide resistance values to each corresponding first output voltage applied to the second memristor crossbar configuration to generate second output voltages that are decompressed from the first output voltages. A controller compares the second output voltages to the input voltages to determine if the second output voltages are within a threshold of the input voltages. The controller generates an alert when the second output voltages exceed the threshold from the input voltages thereby indicating that input data associated with the input voltages has not been previously identified.

A dual tank LC-tuned Voltage Controller Oscillator (LC VCO) comprising a differential pair of cross-coupled transistors (M1, M2, M3, M4) produces a negative impedance by keeping a lower drain swing and a sufficient gate swing. The gate terminals of first and second transistors M1, M2 and third and fourth transistors M3, M4 are separated through a series of two inductors L1, L2 and two cross-coupled capacitors are connected between the drain and gate terminals of cross-coupled transistors to attenuate the output swing. The VCO tank further comprises two R2R Digital to Analog Converters (DAC) to bias both NMOS and PMOS cross-coupled pairs of transistors, to produce a common mode noise.

A grid forming converter (32), is arranged to provide a single-phase or multi-phase converter current. Its control comprises: - a grid forming controller (33) determining (101) a voltage reference value (formula (I)); - a voltage controller (34) determining (102) a current reference value î; - a current limiter (35) determining (103), from the current reference value î, a limited current reference value (formula (II)); - a current controller (36) controlling (104) the converter (32) to provide the converter current i prescribed by the limited current reference value (formula (II)). Therein, at least while a fault condition is present, the voltage controller (34) generates a current reference î based on a relationship between a representative (formula (III)) of a virtual internal voltage (formula (IV)) and a representative (formula (III)) of an actual voltage value ν, the phase angle of the virtual internal voltage (formula (IV)) is controlled to match with the phase angle reference of the voltage reference (formula (I)) and the magnitude of the virtual internal voltage (formula (IV)) is adaptively changed depending on overcurrent conditions.

A grid forming converter (32), is arranged to provide a single-phase or multi-phase converter current. Its control comprises: • a grid forming controller (33) determining (101) a voltage reference value v̂; • a voltage controller (34) determining (102) a current reference value î; • a current limiter (35) determining (103), from the current reference value î, a limited current reference value ; • a current controller (36) controlling (104) the converter (32) to provide the converter current i prescribed by the limited current reference value . Therein, at least while a fault condition is present, the voltage controller (34) generates a current reference î based on a relationship between a representative v̂rep of a virtual internal voltage v̂vir and a representative vrep of an actual voltage value v, the phase angle of the virtual internal voltage v̂vir is controlled to match with the phase angle reference of the voltage reference v̂ and the magnitude of the virtual internal voltage v̂vir is adaptively changed depending on overcurrent conditions.

The invention relates to the technical field of output control, in particular to a constant voltage control method, device and equipment based on a fixed period and a storage medium, and the method comprises the steps: calculating an average effective voltage through multiple times of sampling, dynamically adjusting the conduction time through a PI controller, and achieving the synergistic effect of synchronous starting and error compensation. Adjusting the conduction time of each period in real time according to a PI control result; the output deviation caused by battery voltage fluctuation, control delay and multi-channel asynchronous turn-off is effectively relieved, and the constant voltage control precision and stability of multi-path output in a fixed period are improved; specifically, in the turn-on time of a period k, multiple paths of output voltages are sampled for multiple times, and the average effective voltage is calculated, so that the influence of battery voltage fluctuation on output can be accurately captured, and a reliable basis is provided for error calculation; the on time of the (k + 1) th period is adjusted through the PI controller, the output voltage can be balanced in the next period, continuous accumulation of errors is reduced, and the long-term control precision is improved.

The invention provides a double-closed-loop control method and system for a hydrogen fuel cell grid-connected controller, and relates to the technical field of grid-connected control, and the method comprises the steps: setting an outer loop reference voltage, parameters of a PI controller and parameters of a quasi-PR controller, collecting a real-time output voltage and a real-time output current of an inverter, and carrying out the real-time control of the real-time output voltage and the real-time output current of the inverter; comparing the outer loop reference voltage with the real-time output voltage to obtain a voltage amplitude deviation, generating a control quantity by adopting a PI controller according to the voltage amplitude deviation, detecting the phase and the frequency of the power grid voltage in real time by a phase-locked loop, and generating a real-time inner loop reference current according to the control quantity, the phase and the frequency; the difference value between the real-time inner ring reference current and the real-time output current is calculated, a quasi-PR controller is adopted to generate a PWM modulation signal according to the difference value, the inverter is regulated and controlled according to the PWM modulation signal, and the change of a power grid can be tracked more accurately.

The invention discloses polyurethane foam processing and forming equipment, and relates to the technical field of foam cutting machines. A moving mechanism is arranged below the working table, a cutting wire and a voltage controller are arranged above the working table, two limiting slideways which are symmetrically arranged left and right are formed in the working table, two ends of the cutting wire are connected with a secondary tap of the voltage controller, and a primary tap of the voltage controller is connected with an external power supply through a switch. The cleaning brush is used for scraping coking matter residues attached to the surface of the electric heating wire in real time, so that the electric heating wire for cutting the polyurethane foam is cleaned, meanwhile, the negative pressure pump forms negative pressure in the cleaning box through the spiral negative pressure pipe, the scraped residues are sucked into the cleaning and collecting cavity in time, the residues are prevented from falling off, a workbench and the to-be-cut polyurethane foam are prevented from being polluted, and the service life of the workbench is prolonged. The problem of secondary pollution caused by traditional manual cleaning is solved, the lifting height and the horizontal cutting path of the cutting wire can be accurately controlled through the lifting mechanism and the moving mechanism, the size precision of foam cutting is improved, and the cutting requirement is met.

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 magnetic suspension compressor energy feedback method and system, a compressor, a medium and a program product, and relates to the technical field of compressors, the magnetic suspension compressor energy feedback method comprises the following steps: collecting the real-time bus voltage of the compressor, and when the real-time bus voltage is lower than a preset cut-in voltage threshold, controlling the compressor to enter an energy feedback mode, in the energy feedback mode, a motor of the compressor is controlled to provide electric energy for a preset voltage controller; and inputting a preset bus reference voltage and the real-time bus voltage into a voltage controller, and controlling the voltage controller to output a motor quadrature-axis current to a bus capacitor of the compressor so as to supply power to a bearing controller. The bearing controller cannot be powered off after the magnetic suspension compressor is powered off, the dry grinding condition is avoided, and the operation stability of the compressor is kept.

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.

The present invention discloses a protection system. When the transducer is not connected to the output end of the high-voltage controller, the high-voltage electrical energy output by the high-voltage controller will all act on the conductive coil and generate a magnetic field. The control device can determine that there is a high-voltage output but the transducer is not connected by using the magnetic field strength exceeding a first preset threshold value as a sign, and control the alarm to sound an alarm, so that the user can connect the transducer or turn off the high-voltage output in time, reducing the possibility of user accidents and improving the safety of the extracorporeal shock wave therapy device. In addition, by detecting the magnetic field strength after electromagnetic conversion, the high voltage can be isolated from the control device, meeting the safety requirements of medical devices. The present invention also discloses an extracorporeal shock wave therapy device, which has the same beneficial effects as the above protection system.

A constant voltage regulation system for super capacitor, comprises of a supercapacitor 1 for supplying electrical output for operating a load in EV / HEV, a voltage sensor to facilitate continuous monitoring of supercapacitor's voltage level, an inverter 2 for inverting incoming DC voltage into AC voltage, a controller 7 for analyzing range voltage level is falling, a voltage boosting circuit for selectively adjusting voltage level in accordance with received signal required for driving the load 9, a step-up transformer 3 composed of a primary winding 4 and secondary winding 5 having plurality of tap out 6 terminals in connection with load 9 via corresponding number of relays 8 for selectively tapping tap out terminal 6, a voltage level detection unit for sensing output voltage post tapping operation, a PWM control unit adjusts duty cycle for precise voltage adjustments of 0 boosted voltage and match required voltage to drive / handle the load 9.

The present application belongs to the technical field of new energy network construction type converter, and particularly relates to an asymmetric damping voltage controller for a network construction type converter and a control method thereof, comprising the following steps: step 1: obtaining the inductance current of a filter and the capacitance voltage in the current system; step 2: a power calculation module calculates active power and reactive power; step 3: an active control loop and a reactive control loop obtain the active power and the reactive power; the phase angle generated by the active loop control and the reference value of the inverter output voltage amplitude are calculated; step 4: the asymmetric damping voltage controller obtains the phase angle, the reference value of the inverter output voltage amplitude and the capacitance voltage; and the asymmetric damping voltage controller is used to suppress power oscillation to generate an output current reference value; and a current controller is used to generate a modulation voltage signal. The present application provides an effective technical means for improving the stability and dynamic performance of power electronic equipment in a high penetration rate new energy scene.

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.

To provide a power supply control device and a power supply control program which can check whether or not a load switch is disconnected as expected during fail-safe control.SOLUTION: A power supply control device according to an embodiment comprises load switches, a controller, and a reduction circuit. The load switches can supply and cutoff supplying electric power respectively to a plurality of loads from a first power supply and a second power supply. The controller supplies the electric power from the second power supply to the plurality of loads when the first power supply is failed, and disconnects the load switch that supplies the electric power to a low-priority one of the loads, along with voltage reduction of the second power supply. The reduction circuit reduces voltage of the second power supply as a time elapses. The controller has a diagnosing mode, and upon coming into the diagnosing mode, operates the reduction circuit and checks whether or not the load switch, which supplies electricity to the low-priority one of the loads, is disconnected as the reduction circuit reduces the voltage of the second power supply.SELECTED DRAWING: Figure 1

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.

The present disclosure relates to a voltage controller and a memory device including the voltage controller. A memory device of the present disclosure includes: a memory cell array including a plurality of memory cells storing data; a sense amplifier connected to the memory cell array; and a voltage controller. The voltage controller includes a voltage driver that generates a control signal and an overdrive controller that generates an overdrive control signal, the overdrive control signal regulating the generation of the control signal in response to a comparison result between the control signal and a reference voltage and at least one of process, voltage, and temperature (PVT) information. The voltage driver adjusts the control signal in response to the overdrive control signal to generate an overdrive control signal, and outputs the overdrive control signal to the sense amplifier.

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).