832 results about "Electronic switch" patented technology

The invention discloses an active clamping resonant drive circuit and device. The active clamping resonant drive circuit comprises a power supply module, an energy storage clamping module, a switch group module, an additional capacitor module and an output drive module. The device corresponds to the circuit. According to the application, through the energy storage clamping module and the combination of the switch group module, wide-range duty ratio adjustment of quasi-square wave driving output can be realized under the frequency of tens of megahertz, duty ratio requirements of different working conditions can be adapted, frequency band work with a certain width can be supported through the same set of circuit parameters, and the design flexibility of the ultrahigh frequency power converter is greatly improved; the circuit redesign cost in different frequency scenes is reduced; through the energy storage clamping module, the coupling degree of a driving waveform and line parasitic parameters is effectively reduced, so that the driving circuit still has good stability during high-frequency work, the anti-interference capability is enhanced, the adverse effect of the parasitic parameters or external interference on the driving performance is avoided, and the reliability of high-frequency work of the power electronic switching device is guaranteed.

A self-triggering, bidirectional control electronics component for an electronic switch (50), for the detection and rapid shutdown of currents at a selected threshold value for both current flow directions, includes a threshold switch having a plurality of selectable shutdown threshold values for both current flow directions, the threshold switch coupled to a bidirectional current sensor system (65), arranged in the electronic switch, based on sensing of sensors on an input side of the threshold switch; and a high-speed de-energizing circuit (53) on an output side of the threshold switch including a high non-load circuit voltage for rapid removal of current from a magnetic drive coil (45), the high-speed de-energizing circuit being configured to rapidly remove the current from the magnetic drive coil when the bidirectional current sensor system senses a current greater than or equal to the selected threshold value among the plurality of selectable shutdown threshold values.

The invention discloses a resistance voltage divider calibration system, method and device based on a self-calibration frequency counter and a medium, and relates to the technical field of metering calibration. The system comprises a stabilized voltage source, a resistance voltage divider, a high-speed electronic switch, a voltage-frequency converter, a self-calibration frequency counter, a satellite signal receiver, an electric energy metering chip and a CPU. According to the invention, the output signal of the voltage divider is connected to the voltage-frequency conversion channel through a specific time sequence, the pulse sequence in proportion to the voltage is generated by using the inherent linear characteristic of the output signal, then the pulse sequence is subjected to high-precision counting and comparative analysis through the self-calibration frequency counter, and finally the dynamic correction of the voltage division ratio parameter is realized. According to the technical path, an external reference source and high-precision voltage measurement equipment do not need to be introduced, in-situ calibration of the characteristic parameters of the voltage divider can be completed in a remote mode, and the long-term stability of the high-voltage electric energy metering device in a complex electromagnetic environment is remarkably improved.

The invention relates to the technical field of electromagnetic transient simulation, in particular to an electromagnetic transient simulation system of a power system containing multiple electronic power switches, which is characterized in that numbering and topological serial number analysis are performed on multi-switch node, resistance, inductance and capacitance parameters, and a connection mapping matrix is formed by adopting impedance conversion and admittance construction modes; a sequence structure is formed by coding control variables through a genetic algorithm, a variable sequence is constructed through switching time points and topological connection, error and duration combined evaluation is executed, an optimal combination is screened, time matrix construction is carried out after energy storage voltage and filter current are collected, and a principal component vector and a covariance projection coefficient are extracted; meanwhile, an input matrix is constructed, harmonic information is fused in a unified time step, a residual network structure is introduced to carry out time-step-by-step iterative updating processing on an initial weight, dynamic adjustment is completed in combination with residual offset calculation and local error compression in each step, and a continuous and complete reconstructed waveform is output.

A battery disconnect unit including a housing, an electronic relay module installed on a charge / discharge line of a battery within the housing and including electronic switch devices capable of a switching operation of selectively blocking the flow of a current in the charge / discharge line, a heat dissipation cover provided with a structure surrounding at least a portion of the electronic relay module and formed of a material capable of heat exchange with the electronic relay module, and a cooling plate disposed in contact with the heat dissipation cover and provided to allow a refrigerant to flow in the cooling plate.

A power conversion system is provided, which system includes a first power converter including power electronic switches of a first type that are switchable to provide electric power conversion; and a second power converter connected in parallel to the first power converter. The second power converter includes power electronic switches of a second type that are switchable to provide electric power conversion. The second type is different from the first type. The second type of power electronic switches includes wide bandgap semiconductor switches. The system further includes a controller configured to operate the power conversion system in a first operating mode in which the second power converter is operated at a first switching frequency, and in a second operating mode in which the second power converter is operated at a second switching frequency of the power electronic switches and the first power converter is operated to provide power conversion.

The utility model discloses a vibration-based automatic photovoltaic device dust removal device and a vibration control system thereof, the device is applied to a solar photovoltaic power station, and the device comprises a vibration control system, a vibration unit and an elastic assembly; the vibration control system is connected with the vibration unit, and the vibration unit is arranged on the photovoltaic panel; the vibration control system is connected with a photovoltaic module on the photovoltaic panel; the elastic assembly is arranged on the photovoltaic panel; the vibration control system comprises a power module and a control unit, the input end of the power module is connected with the output end of the photovoltaic module, the output end of the power module is connected with a vibration unit, and an electronic switching device is arranged between the output of the power module and the vibration unit and connected with the output of the control unit. The on-off of the electronic switching device is controlled through the control unit. According to the utility model, safe, efficient and energy-saving automatic cleaning of the photovoltaic module without human intervention is realized.

An apparatus includes a light-emitting diode (LED) driver circuit, one or more LEDs of an LED array, and an electronic switching circuit. The LED driver circuit is configured to generate an electric current. The one or more LEDs are electrically connected to the LED driver circuit. The electronic switching circuit is electrically connected to the one or more LEDs and configured to be placed in one of multiple switching configurations. The electronic switching circuit is further configured to direct a portion of the electric current away from the one or more LEDs, such that a remaining portion of the electric current drives the one or more LEDs. The portion of the electric current corresponds to the one of the multiple switching configurations.

An electronic power distribution arrangement is disclosed which includes an electrical line for supplying power to a capacitive load; a first electronic switch for fusing the capacitive load; a second electronic switch for precharging the capacitive load prior to switching through the first electronic switch; a resistor connected in series with the second switchable current path of the second electronic switch, the series connection being connected in parallel with the first switchable current path of the first electronic switch; and a controller. The controller is adapted to turn on the second electronic switch to precharge the capacitive load before turning on the first electronic switch to supply power to the capacitive load, and to turn on the first electronic switch only when a voltage across the resistor reaches a threshold value.

The application provides a pressure signal fitting method and device, the method comprises: applying pressure to each sensing point in a pressure sensor, measuring the relationship between pressure and resistance of each sensing point, and integrating to obtain the pressure-resistance relationship; the pressure-resistance relationship is corrected through a numerical filtering algorithm, and the corrected pressure-resistance relationship is fitted to obtain an optimized pressure-resistance relationship; the switching of the voltage sensing circuit sensing points is carried out through an integrated analog electronic switch, the voltage of the stressed multiple array sensing points is measured; the resistance of the multiple array sensing points is calculated according to the measured voltage combined with the acquisition circuit; and the pressure of the multiple array sensing points is calculated through the optimized pressure-resistance relationship; based on the area of the stress area and the non-stress area of the multiple array sensing points, the actual stress of the multiple array sensing points is calculated through the relationship between force and pressure.

The invention discloses an RC-IGCT-based superconducting hybrid DC circuit breaker, and relates to the topological structure and working principle analysis of DC circuit breakers. The circuit topology comprises two parts: (1) a resistance-type superconducting fault current limiter R-SFCL and a UDS isolation switch adopting a TP KEMA arc model are connected in series, and (2) a current commutation component composed of diodes VD1-VD4, a current injection branch and a current commutation branch. VD1-VD4 are used for conducting bidirectional current; the current injection branch comprises a pre-charging capacitor C, an inductor L and a thyristor T which are connected in series; the current commutation branch circuit is formed by connecting a power electronic switch, an RCD buffer branch circuit and an energy absorption branch circuit in parallel, and the energy absorption branch circuit is composed of a metal oxide lightning arrester; the invention further discloses a current breaking method of the superconducting hybrid direct-current circuit breaker. According to the invention, quick switching-off can be realized after fault current occurs, the rise rate of the fault current is limited, and the loss and the cost are low under the normal through-current condition.

The invention discloses a direct-current power generation system and a control method thereof, which innovatively adopts a photovoltaic and energy storage double-cascade architecture and combines an intelligent protection and coordination control strategy. The system comprises N photovoltaic cascade subunits and M direct current energy storage modules, and each unit is provided with a bypass protection device. Each photovoltaic cascade subunit is integrated with an MPPT controller, an isolation converter and a bypass protector containing a piezoresistor and a diode; the energy storage module adopts a non-isolated DCDC conversion circuit, and a matched energy storage bypass protector is integrated with a bidirectional power electronic switch, a piezoresistor and a mechanical isolation switch. The technical problems of large voltage fluctuation, low system reliability, difficult maintenance and the like of a traditional direct current system are effectively solved, the service life of equipment is prolonged while the system stability is improved, and the system is particularly suitable for medium-high voltage direct current power supply scenes.

The present application discloses an energy self-balancing flexible DC converter valve, a control method, and a DC system. The converter valve includes three phase units, each of which includes an upper bridge arm and a lower bridge arm. The upper bridge arm and the lower bridge arm are both connected in series with a number of full-bridge submodules, a number of half-bridge submodules, and bridge arm reactors. The submodules of the upper bridge arm and the lower bridge arm are both optimized MMC submodules including an energy self-balancing circuit. The energy self-balancing circuit is composed of a power electronic switch and an energy dissipation resistor in series, and is used to dissipate surplus energy when the DC transmission system has a fault that causes an overvoltage risk in the capacitor of the optimized MMC submodule. The present application can solve the technical problem of the inability to dissipate surplus power in a DC transmission system due to a fault in a new energy island ultra-long-distance DC transmission scenario at a very low cost without affecting the operating logic of the traditional converter valve. It can make full use of the capacitor of the optimized MMC submodule to temporarily store energy and reduce the heat dissipation waste of surplus power.

This application provides a smart electronic switch capable of providing reminders, comprising: a power switch whose gate is connected to a switch control unit; and an aging assessment control module connected to a first terminal, a second terminal, and the gate of the power switch, respectively. The smart electronic switch includes an aging assessment mode. In this mode, the aging assessment control module controls the power switch to turn on, sets the gate-source voltage of the power switch to a first preset voltage, and compensates the drain-source current of the power switch to a first reference current. The aging assessment control module obtains first parameter information characterizing the on-resistance and compares this first parameter information with reference parameter information. If the comparison result between the first parameter information and the reference parameter information meets a preset condition, the aging assessment control module issues a reminder signal. Embodiments of this application also provide a chip, an automobile, and a method.

Circuits and methods that enable a “break-before-make” process for an electronic switch that avoids the relatively large time delays of fixed time delay circuitry. Logic gates, rather than a time delay, are used to lock out an input switch through-path from turning ON before another input switch through-path is fully turned OFF. An embodiment includes a first and second monitor logic blocks, configured such that (1) a first through-path is turned OFF before a first shunt-path is allowed to turn ON and before a second shunt-path is allowed to turn OFF, and the second shunt-path is turned OFF before a second through-path is allowed to turn ON; and (2) the second through-path is turned OFF before the second shunt-path is allowed to turn ON and before the first shunt-path is allowed to turn OFF, and the first shunt-path is turned OFF before the first through-path is allowed to turn ON.

Various techniques are described to control the rate of change of current (di / dt) and the rate of change of voltage (dV / dt) for power electronic switches with conventional gate drivers and a few additional components. By implementing these techniques, designers may achieve better control over the switching behavior, reduce losses, and improve the overall reliability and efficiency of their circuits. This is particularly important in applications such as power inverters, where high performance and reliability are important.

The utility model provides a high-side intelligent electronic switch, an integrated circuit chip, a chip product and an automobile, the high-side intelligent electronic switch comprises an N-type switch tube and a P-type switch tube, a control circuit comprises a logic control unit, a first driving unit and a second driving unit, the first driving unit comprises a boost module and a first driving module, and the second driving unit comprises a second driving module and a third driving module. The second driving unit comprises a second driving module, in the normal working mode, the boosting module works, the output voltage of the boosting module is larger than the voltage of the power supply end, and the logic control unit controls the N-type switching tube to be turned on and turned off through the first driving unit; and in the bypass mode, the boost module stops working, and the logic control unit controls the P-type switching tube to be turned on and turned off through the second driving unit. According to the scheme, when the high-side intelligent electronic switch provides small current, the P-type switching tube is driven to be turned on and turned on, a boosting module does not need to work, and self power consumption of the intelligent electronic switch is reduced on the premise that normal work of a load is guaranteed.

The invention relates to a method and a circuit for identifying capacitive and resistive load short circuits in an alternating current load. The circuit comprises a current detection unit A, an MOS (Metal Oxide Semiconductor) tube switch unit B, a residual current sampling unit E, a live wire / zero line load short circuit detection unit C, a test power supply control unit D, a live wire / live wire short circuit detection unit F, an MCU (Microprogrammed Control Unit) operation control unit G and a power supply unit H, according to the method, short circuits between a zero line and a live line, between a live line and a ground line and between live lines can be identified independently or simultaneously; the method is a rapid identification method considering capacitive load false short circuit and resistive short circuit (true short circuit) current, the short circuit protection time is less than or equal to 150 microseconds, the identification period time is less than or equal to 10 milliseconds, and through the circuit technology, the identification error phenomenon caused by the fact that a load output end protected by an MOS tube electronic switch is connected with the capacitive load can be reduced.

The utility model provides an anti-reverse-connection short-circuit protection circuit. The anti-reverse-connection short-circuit protection circuit comprises a first electronic switching tube, a second electronic switching tube, a first resistor, a second resistor and a third resistor. And the microcontroller and the operational amplifier are used for detecting an abnormal state in the circuit and outputting a level signal to control the second electronic switching tube. When the circuit is short-circuited, the operational amplifier and the microcontroller can respectively output high-level signals, so that the second electronic switching tube is conducted, the first electronic switching tube is cut off, a charging loop is cut off, and then double short-circuit protection is provided. And meanwhile, an internal parasitic diode of the first electronic switching tube has unidirectional conductivity, so that the damage to the battery caused by reverse current when the charger is reversely connected can be effectively prevented. In addition, after the short-circuit fault is removed, the anti-reverse-connection short-circuit protection circuit can automatically recover the charging state, human intervention is reduced, the use cost is reduced, and the continuous operation capability is enhanced.

The invention relates to an on-board electrical system of a rail vehicle, wherein the on-board electrical system comprises at least one vehicle-wide DC busbar, at least one on-board electrical system battery which is designed to supply the DC busbar, a plurality of distributed electrical loads, a plurality of load circuits which connect the loads to the DC busbar, and a plurality of controlled electronic switching and protection devices which are designed to switch and protect the load circuits, and wherein the on-board electrical system is characterised in that an adaptation device is arranged upstream and / or downstream of at least one of the electronic switching and protection devices, wherein the adaptation device comprises at least one passive electrical component which limits a rate of rise of current.

This present invention relates generally to devices, systems, and methods for performing optical and electrochemical assays and, more particularly, to devices and systems having universal channel circuitry configured to perform optical and electrochemical assays, and methods of performing the optical and electrochemical assays using the universal channel circuitry. The universal channel circuitry is circuitry that has electronic switching capabilities such that any contact pin, and thus any sensor contact pad in a testing device, can be connected to one or more channels capable of taking on one or more measurement modes or configurations (e.g., an amperometric measurement mode or a current drive mode).

A device for replacing at least one chip or electronic element of an electronic component, in particular an LED package or an LED display, includes at least two standard electrical contacts to which a chip comprising at least two electrical contacts is electrically connectable. The device also includes an electronic switch electrically connecting the first standard electrical contact to an electrical power supply source, and least three electrical repair contacts to which a repair chip identical in construction to the chip is electrically connectable. The first electrical repair contact is electrically connected to the electrical power supply source. The second electrical repair contact is electrically connected to the electronic switch. The third electrical repair contact is electrically connected to the second electrical standard contact.

The invention relates to a method (100) for determining power data of electronic power circuits, comprising determining a plurality of switching energy values (110) during a periodic duration of a control signal of the electronic power circuit; and determining the power data (120) which have a switching cycle energy value that is determined on the basis of the plurality of switching energy values and a number of times the plurality of switching energy values are determined. The invention further relates to a computing unit for determining power data, which computing unit is designed and configured to carry out the method.

The utility model provides an adjustable hysteresis difference over-temperature protection circuit which comprises a main power supply circuit and a temperature difference hysteresis circuit, and the main power supply circuit provides stable input voltage for the temperature difference hysteresis circuit. The temperature difference hysteresis circuit comprises a main control chip, a negative temperature coefficient resistor, a first resistor, a second resistor, a first electronic switch tube and a second electronic switch tube, the two ends of the negative temperature coefficient resistor are connected with the first resistor and the second resistor respectively, and the control end of the first electronic switch tube is connected with the first end of the second electronic switch tube. The control end of the second electronic switching tube is connected with the first end of the second resistor. When the temperature of the negative temperature coefficient resistor rises to trigger over-temperature protection, current passes through the first resistor and the first switch electron tube to provide bias current for the second resistor, so that the voltage is greatly increased and a temperature hysteresis difference is formed, meanwhile, the circuit structure is simple, and the use cost is reduced; in addition, the temperature hysteresis difference of the circuit can be flexibly adjusted by adjusting the resistance value of the first resistor.

A mechanical electronic switching assembly for a multi -phase motor comprises a fixed body comprising a plurality of fixed contacts each arranged to be permanently connected to a corresponding terminal of a corresponding phase fraction; a moveable body that can be moved with respect to the fixed body between a first position, in which the phases are arranged in a first electrical configuration; and a second position, in which the phases are arranged in a second electrical configuration, wherein the second electrical configuration is different from the first electrical configuration, and an actuator arranged to move the at least one moveable body between the first position and the second position. The movable body comprises a plurality of movable contacts each arranged to contact at least one of the fixed contacts. The movable body and the fixed body together are arranged to provide two different current flow paths such that the electrical configuration of phase fraction terminals can be reconfigured between the first electrical configuration and the second electrical configuration by selecting the corresponding current flow path, the current flow path varying in both the movable body and the fixed body between the first electrical configuration and the second electrical configuration.

The invention provides a hybrid switch device, and relates to the technical field of electrical equipment. The hybrid switch device comprises a mechanical switch unit, an electronic switch unit, an isolation switch and a protection element. The electronic switch unit and the mechanical switch unit are connected in parallel, the isolation switch is arranged in a loop where the mechanical switch unit is located in parallel and arranged in a loop where the electronic switch unit is located in series, or the isolation switch is arranged in the mechanical switch unit in series and arranged in a loop where the electronic switch unit is located in series; the protection element is connected in parallel with the electronic switch unit; in the switching-on process, the isolating switch, the electronic switch unit and the mechanical switch unit are sequentially switched on, and the electronic switch unit is switched off; and in the opening process, the electronic switch unit is closed, and the mechanical switch unit, the electronic switch unit and the isolating switch are sequentially disconnected, so that the isolating switch ensures the electrical isolation safety, and the reliability, controllability and connection layout rationality of the hybrid switching device are improved.

The embodiment of the invention provides a laser hair removal instrument and a control method thereof. The laser hair removal instrument comprises a host and at least one pair of treatment handles. The host comprises a laser driving power supply, a controller and a socket arranged for the treatment handle; each treatment handle comprises an electronic switch and a laser, and each treatment handle can be connected with the host through a corresponding socket; the laser driving power supplies are respectively connected with the lasers through the corresponding electronic switches, and the controller is respectively connected with the corresponding electronic switches. According to the laser hair removal instrument provided by the embodiment of the invention, the paired treatment handles are configured, each treatment handle is provided with the electronic switch, and the controller can control the on-off of the electronic switches of the two treatment handles in the multiplexing period, so that the laser devices of the two treatment handles can alternately work; two persons adjacent to the bed can perform laser hair removal at the same time, the congestion problem caused by the fact that multiple persons operate multiple laser hair removal instruments in the prior art is partially solved, and the mechanism operation burden and the customer service price are reduced.

The invention relates to a method and an electronic circuit for operating a switching element connected in parallel with a rectifier element. The method comprises: charging a capacitor (2) coupled to a load path node (13, 14) of an electronic switch (1), wherein the electronic switch (1) comprises a switching element (11) and a rectifier element (12) connected in parallel with a load path of the switching element (11) and between the load path nodes (13, 14); allowing the capacitor (2) to discharge via the load path node (13, 14) of the electronic switch (1); and comparing the capacitor voltage (V2) across the capacitor (2) with a first voltage level (V21).

The invention discloses a power supply time sequence control circuit for a PCIe board card, relates to the technical field of power supply time sequence control, and aims to solve the problems of strong temperature sensitivity, insufficient precision, poor anti-interference capability and the like of a traditional power supply time sequence control scheme based on resistors and capacitors. The power supply time sequence control circuit comprises a power supply input module, a plurality of VRM modules and a control module, the control module starts a power-on process by detecting the stability of the power supply input module, monitors the state of the turned-on power supply by using a GPIO interface, and controls the enabling of the next-stage power supply according to a preset time sequence after confirming that the upper-stage power supply is stable, so that the orderly power-on of the multi-stage power supply is realized, and meanwhile, the circuit can be integrated with an electronic switch to realize the automatic switching of 12V voltage. The method is suitable for various PCIe board cards with high requirements on the power supply time sequence precision and stability, can effectively guarantee the stable operation of the board cards, and improves the reliability and adaptability of the whole power supply management.

The invention provides a system for secure encryption of CPU boot firmware and a working method thereof. The system comprises a CPU unit, an MCU unit, a FLASH unit and an electronic switch unit. By introducing an MCU unit, conventional CPU boot firmware is firstly subjected to data encryption processing and then stored in a first FLASH chip to complete initial configuration, in the system starting process, the MCU firstly reads, decrypts and restores the securely encrypted boot firmware in the first FLASH chip into conventional boot firmware, and writes the conventional boot firmware into a second FLASH chip, so that the boot firmware in the second FLASH chip is subjected to data encryption processing; and then the CPU loads a conventional boot firmware starting system from the second FLASH chip, and after the CPU is started, the MCU erases the boot firmware in the second FLASH chip. Only the first FLASH chip stores the securely encrypted boot firmware, and the second FLASH chip only temporarily stores the boot firmware in the starting stage, so that the risk of physical leakage and cracking of the boot firmware is effectively prevented.