84 results about "Active switch" patented technology

The invention relates to the technical field of data processing, and discloses a flue gas treatment intelligent regulation and control method and system based on artificial intelligence and a medium. The method comprises the following steps: collecting parameter data of a flue gas system through a sensor network and processing to obtain preprocessed data; using unsupervised clustering to identify working condition features and categories; constructing an emission concentration error active switching control model according to the working condition information; different working condition control parameters are optimized by adopting a differential evolution algorithm; optimized parameters are input into a controller, and modes are dynamically switched according to pollutant errors. The control strategy can be automatically switched according to the working condition characteristics of the flue gas treatment system, the complex and changeable industrial production environment can be effectively dealt with, and the system operation cost is optimized while stable and up-to-standard emission of pollutants is guaranteed.

An isolated DC-DC converter is provided, including a full-bridge switching stage, a resonant network, a transformer, an output stage, an output stage, an error amplifier, a feedforward controller, a charge sensor and a switch controller. The output stage generates an output signal, wherein the output signal is an output voltage or output current. The error amplifier generates an error signal based on the output signal and a reference signal, wherein the reference signal is a reference voltage or reference current. The feedforward controller senses an input voltage of the full bridge switching stage, and generates a feedforward control signal based on the sensed signal. The charge sensor generates at least one charge sensing signal. The switch controller generates and provides switch control signals to the plurality of active switches in charge control mode based on at least the error signal, the feedforward control signal and the charge sensing signal.

The present disclosure provides a totem-pole PFC converter and a control method thereof. The totem-pole PFC converter includes: a plurality of phase legs connected in parallel; a plurality of boost inductors, wherein each boost inductor is connected between the corresponding input terminal and the midpoint of the corresponding phase leg; a plurality of capacitors; a diode leg connected with the plurality of phase legs in parallel, wherein the midpoint of the diode leg is connected with the neutral terminal; an output filter connected with the diode leg in parallel; a T-type leg connected between the midpoint of the diode leg and the midpoint of the output filter and including two active switches connected in series; and a control system configured to turn the two active switches on around AC voltage zero crossings during non-unity power factor operation.

The application relates to a bidirectional output L2C3 resonant converter, which comprises two excitation sources and a resonant cavity, wherein the excitation sources are both half-wave bridge circuits; the resonant cavity comprises a transformer, three capacitors and two inductors; the primary winding of the transformer is connected in parallel with a resonant capacitor C p 1; the same end of the primary winding of the transformer is connected with a resonant capacitor C1 and an inductor L1 in series connection; the other end of the inductor L1 is connected with the connection point of the first excitation source and two switch tubes in series connection; the same end of the secondary winding of the transformer is connected with a resonant capacitor C2; the other end of the resonant capacitor C2 is connected with the connection point of the second excitation source and two switch tubes in series connection; the leakage inductor L g of the secondary winding of the transformer is used as a resonant inductor; the other ends of the same ends of the primary and secondary windings of the transformer are respectively connected with the negative poles of the direct-current power supplies of the corresponding excitation sources. Energy bidirectional transmission and synchronous rectification are realized through a brand-new circuit topology. All active switches can realize soft switching, and the working efficiency is improved. In an open-loop control state, the output current does not change with the change of a load, and the application is suitable for a bidirectional constant current working mode.

The present invention relates to a battery disconnect unit using an active switch, the battery disconnect unit comprising: a main switch that supplies, to an inverter, power from a battery to drive a motor; and a precharge line connected in parallel with the main switch to precharge a DC-link capacitor, wherein the precharge line includes a precharge switch, which is a power semiconductor device, and an inductor that are connected in series with each other such that the DC-link capacitor can be precharged via periodic on-off operations of the precharge switch.

The invention provides a power converter, a photovoltaic system and an active bypass method of a photovoltaic module, an active switch is adopted to replace a bypass diode in a photovoltaic junction box, and an active bypass function is merged into the power converter to save cost. Moreover, the bypass condition is monitored in cooperation with related control logic, the switching tube is switched on when the bypass function needs to be executed, the working loss of a bypass device is reduced, and the purpose of reducing bypass heat consumption is achieved. The controller recognizes whether the battery string is shielded or not by changing the on-off state of the switch in a mode of applying disturbance to the working state of the connected battery string and comparing the voltage difference between the positive input end and the negative input end of the power conversion circuit under the condition that disturbance exists or not, and then controls whether the switch enters a bypass working state or not based on a detection result. And after the control switch is in the conducting state for a set duration, disturbance is applied to the working state of the connected battery string again to monitor whether the battery string is unblocked or not and whether the switch needs to exit the bypass mechanism or not.

A belt retractor unit with a housing, a belt reel rotatably mounted in this housing, a blocking unit for blocking the belt reel against the housing, wherein the blocking unit has an actuator unit with an electromagnet and a control apparatus for controlling the electromagnet, which has a power input, a power output connected to the electromagnet and at least one signal input for receiving a control signal and / or a sensor unit for generating a control signal, wherein the control apparatus has at least a first active switching state and a passive switching state, wherein in the first active switching state an electric current flows between the power output and the electromagnet, the current intensity of which is greater than in the passive switching state, wherein the control apparatus has between the power input and the power output at least one DC / DC converter acting as a constant current source, so that the current intensity in the first active switching state has a defined first value independent of the voltage applied to the power input.

The application discloses a multi-section active switch type in-situ thermal conduction soil electric heating device and a heating method, which comprises a power supply system arranged above the ground and a heating system penetrating into the ground. The heating system comprises a heating well and a heating assembly arranged in the heating well. The heating assembly comprises a spiral coil heating resistor and a plurality of vertical conductive connecting rods. Different conductive connecting rods are connected to the spiral coil heating resistor at different depths. The power supply system and the spiral coil heating resistor are connected to any two conductive connecting rods through a control circuit to form a closed loop circuit, so that the spiral coil heating resistor at different depths is heated. The control circuit is provided with a switch for controlling the opening and closing of different closed loop circuits. The application can flexibly and specifically meet the differentiated heating requirements of different depth soil layers, realize accurate heating, and save energy.

The present invention discloses a method and device for dealing with the antifreeze problem of water meters, comprising the following steps: S1, installing a temperature sensor and a pressure sensor in the water meter respectively; S2, installing a switch pressure relief valve on the outside of the water meter; S3, accurately determining whether the water meter is in a frozen state by collecting water temperature and water pressure; S4, simultaneously setting a temperature threshold, and when the water temperature in the meter is lower than the temperature threshold, starting the timer and opening the switch pressure relief valve; S5, resetting the temperature range threshold and the pressure threshold, and when the water temperature reaches the temperature range threshold and the pressure threshold, opening the switch pressure relief valve, otherwise it does not reach the set temperature range threshold and the pressure threshold. This device can accurately determine whether the water meter is in a frozen state by collecting water temperature and water pressure, and the water meter quickly releases pressure to the water meter through the active switch pressure relief valve, thereby achieving the effect of active antifreeze of the water meter. Compared with the existing technology, it has better antifreeze effect, faster response, and better water saving.

A power supply component comprising a supply node to provide a supply voltage and a supply line to provide a source voltage. The supply line comprising a source node that has a source voltage, and the supply line includes a supply line switch coupled between the source node and the supply node, wherein the supply line switch couples the source voltage to the supply node when the supply line switch is closed. A current diversion component diverts leakage current away from one or both of the source node and the supply node when the supply line switch is open.

The embodiment of the invention discloses a zero-crossing commutation control method, electronic equipment and a storage medium. The method comprises the following steps: detecting a polarity change of an input voltage; in response to the polarity change, according to a preset control parameter, an open-loop pulse is emitted through a corresponding active switching tube, and discharging of a plurality of open-loop periods is carried out on a corresponding synchronous rectifier tube; the control parameters comprise at least two groups of different pulse width step lengths, and the width of the open-loop pulse changes along with the pulse width step length corresponding to each open-loop period; and when the open-loop pulse number reaches the preset maximum pulse number, the corresponding synchronous rectifier tube is conducted. By adopting a multi-section linear open-loop pulse discharge strategy, the discharge current peak can be reduced, the discharge process is smooth, the synchronous rectifier tube is ensured to be conducted at the minimum voltage, and the problems of EMI and voltage oscillation in a traditional totem PFC zero-crossing commutation scheme are effectively solved.

The invention provides a power module, a motor controller comprising the power module, a driving assembly and a vehicle, and belongs to the technical field of vehicle driving control. The invention discloses a power module. The power module comprises a converter bridge; the converter bridge is a multi-phase circuit; wherein the converter bridge comprises at least one active switch chip and at least one passive follow current chip; in at least one bridge arm of the converter bridge, the ratio of the total area of the passive follow current chip to the total area of the active switch chip satisfies a first ratio, and the first ratio is greater than or equal to 0.6. According to the power module provided by the embodiment of the invention, the miniaturization of the power module is realized.

A warning light control circuit capable of preventing start-up flashing, which has a start-up flash prevention circuit including active switch, current limiter, first shunt resistor and second shunt resistor set between warning light control IC and Data Bus. The active switch has the gate coupled between first and second shunt resistors, the source coupled to ground point and the drain coupled to the positive terminal of current limiter. The other end of first shunt resistor is coupled to Input Voltage Source. The other end of second shunt resistor is coupled to ground point. The negative terminal of current limiter is coupled to Data Bus. When the warning light control circuit starts to turn on, the starting pulse wave of Data Bus is blocked by current limiter to prevent warning light control IC from being turned on instantaneously.

The invention discloses an interconnection architecture applied to an accelerator cluster, which can be applied to any interconnection architecture capable of prolonging a transmission distance, reducing signal loss, reducing transmission cost and power consumption and having exchange capacity, namely any architecture capable of connecting two ends in the accelerator cluster to serve as interconnection components. The characteristics of data routing and forwarding at the two connected ends are utilized, the expandability and dynamic reconfigurability of the accelerator cluster are enhanced, the resource utilization rate is improved, and the requirement of the accelerator cluster for a high-capacity switch can be directly reduced. In addition, an interconnection network deployment mode of independent networking can be achieved without using a switch, and collaborative / hybrid deployment with a traditional switch can also be achieved. In addition, the invention also has the following advantages: 1, networking is allowed under the condition that a traditional switch is not used, and the reliability and fault tolerance of the system are improved through a mode of connecting a plurality of active switching connectors in parallel; 2, on the basis of mixed use of a novel high-performance interconnection architecture and a traditional switch, the requirement of networking on high-capacity traditional switching equipment can be reduced; and 3, the expandability of the accelerator cluster is enhanced, and the system can be expanded more conveniently.

The invention discloses a full-mode equivalent modeling method for a full-half hybrid modular multilevel converter considering a dead zone, and relates to the technical field of electric power simulation. According to the method, the influence of a switch containing dead zone control on the working state of a sub-module is fully analyzed, Thevenin equivalence based on an ideal switching device is adopted for an active switching event dominant mode, a virtual diode is introduced into a passive switching event dominant mode, all modes are connected in series through a Branch section, a full-mode equivalent model of a full-half valve section is established, and a full-mode equivalent model of the full-half valve section is established. And finally, connecting the model into a bridge arm of the modular multilevel converter in series to obtain a full-mode equivalent model of the full-semi-hybrid modular multilevel converter. The method is characterized in that the Thevenin equivalence based on the ideal switching device can greatly reduce the calculation complexity and improve the calculation efficiency on the premise that the precision is not lost; a virtual diode is introduced, and accurate positioning of a passive switching event can be realized by using an interpolation algorithm of the diode in PSCAD.

The utility model discloses a portable lighting device for power line overhauling relates to power overhauling lighting technical field, including main part, and the main part front end is provided with main light, and the main part tail end rotatoryly is equipped with the installation sleeve of installation band and magnet, and the main part peripheral side is installed with the active switch and auxiliary light switch, and the active switch controls the opening and closing of main light, the main part peripheral side still is provided with containing groove, and the containing groove is rotatoryly connected with rotary support in damping, and the movable end rotatoryly connected with auxiliary light of rotary support, and auxiliary light is electrically connected with auxiliary light switch, the utility model discloses the setting of rotary support and auxiliary light, and the cooperation of multiple auxiliary lights can weaken the shadow that forms to main lamp cover set, thereby reducing the probability that staff is influenced by line shadow and distinguishes unclearly, and simultaneously still can utilize auxiliary light and carry out the irradiation of multiple places, multiple angles to light supplement, thereby can flexibly carry out the irradiation of multiple positions of power line, and be more favorable to the overhauling of staff.

Bias supplies and plasma processing systems are disclosed. One bias supply comprises an output node, a return node, and a switch network and at least one power supply coupled to the output node and the return node. The switch network and the at least one power supply configured, in combination, to apply an asymmetric periodic voltage waveform and provide a corresponding current waveform at the output node relative to the return node. A timing parameter estimator receives a digital representation of a full cycle of the voltage and current waveforms, and generates a pulse width control signal based on a crossing time that the current waveform crosses a threshold current value after falling from a positive peak current value to control the switch network.

The invention discloses a five-switch multi-mode wide-voltage-range LLC resonant converter. The five-switch multi-mode wide-voltage-range LLC resonant converter is mainly composed of a five-switch inverter stage, a resonant cavity, a high-frequency transformer and a full-wave rectifier stage. A hybrid modulation mode is adopted in a control strategy, the duty ratio is adjusted through fixed-frequency pulse width modulation (PWM) so as to increase the voltage of a direct-current bus, and the voltage gain range of more than three times is achieved in cooperation with fixed-duty-ratio pulse frequency modulation (PFM). In addition, the topology can maintain excellent soft switching characteristics in a full working range, and high-efficiency operation under wide voltage output is ensured. Compared with a traditional wide-range resonant converter, only five weighted switch tubes, one transformer and two diodes are needed, the hardware cost is remarkably reduced, the power density is improved, and the wide-range resonant converter has remarkable engineering application value.

The invention discloses an active switch coupling inductor direct-current boost converter, solves the problem of how to obtain higher voltage gain by the direct-current boost converter, and belongs to the technical field of power electronic converters. The circuit comprises diodes D2-D6, an inductor unit L3, coupling inductors N1-N2, a power switch tube S1, a power switch tube S2, a capacitor unit C2 and an output unit. When the S1 and the S2 are conducted at the same time, the inductor unit L3 is charged, the direct-current voltage source charges the coupling inductor N1 through the diode D5 and the capacitor unit C2, and the output unit supplies power to the load resistor. When the S1 and the S2 are turned off at the same time, the inductive voltage of the inductance unit L3 and the coupling inductors N1 and N2 charges the capacitor unit C2 through the diode D2, and the voltage Vin of the direct-current voltage source, the inductance unit L3 and the coupling inductors N1 and N2 supply power to the load resistor through the output unit, so that very high voltage output gain is achieved under the condition that the duty ratio is very low.

The present disclosure relates to electromagnetic side-channel countermeasures. Embodiments herein relate to countermeasures against electromagnetic (EM) probing attacks on voltage regulators (VRs) of cryptographic circuits. In one aspect, the clamping strength of a VR (e.g., a switched-capacitor VR) is dynamically and randomly modulated. The VR can include switches for transferring charge, where the switches can include multiple sub-switches in parallel, and the number of active switches is randomly changed to randomize EM emissions. In another aspect, the capacitors of a VR are formed in a metal routing layer (e.g., a top metal layer) of an integrated circuit package, where the capacitors have interdigitated electrodes that cancel current in and out of the electrodes, thereby reducing EM emissions. In another aspect, a resonant VR includes circuitry for detecting changes in current or voltage that are related to changes in its resonant frequency due to being subjected to EM probing.

In some examples, a method for manufacturing a switching structure for a radial slot line antenna, RLSA, array using a single semiconductor wafer element, comprises forming a set of active switching devices within the wafer element, a position of each active switching device on the wafer element selected according to a predefined configuration representing a slot element layout for the RLSA array, and forming driving circuitry within the wafer element, the driving circuitry for individually addressing respective ones of the set of active switching devices, whereby to enable selected bias signals to be applied to the set of active switching devices.

The utility model discloses a vehicle locking intelligent control system and a vehicle. The vehicle locking intelligent control system comprises a control module ECU and a vehicle-mounted BCM which are arranged in the vehicle. The control module ECU is connected with a vehicle-mounted BCM (Body Control Module), and the control module ECU is used for receiving a vehicle locking signal; the control system further comprises an active switch, and the active switch is connected with the control module ECU and used for receiving opening and closing signals of the active switch. The vehicle-mounted BCM is connected with the vehicle-mounted air conditioner controller, and the control module ECU controls the locking state and the air conditioner state of the vehicle through the vehicle-mounted BCM and the vehicle-mounted air conditioner controller according to opening and closing signals of the active switch. The air conditioner has the advantages that the air conditioner can be kept to be started for a period of time while the vehicle is started to be locked through the active switch, so that the requirement of a user for temporarily locking the vehicle to go out is met, and children or pets in the vehicle cannot be risky when the user temporarily goes out.

The present invention belongs to the field of microgrid technology and discloses a DC-DC converter with dual duty cycles and a control method. The converter includes: a power supply, a first inductor, a second inductor, a first switching transistor, a second switching transistor S2, a third switching transistor, a first inductor, a second inductor, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a fifth capacitor. The DC-DC converter of the present invention has high voltage gain capability without relying on a transformer or coupled inductors. The present invention is achieved by effectively integrating an active switched inductor network and a switched capacitor, and high voltage gain can be achieved by using a low duty cycle value.

The invention belongs to the technical field of radiation department warning devices, in particular to a radiation warning and reminding device for radioexamination, and provides the following scheme that the radiation warning and reminding device comprises a frame body, a fixed door plate and a sliding door plate, the fixed door plate is fixedly connected to the inner wall of the frame body, and the sliding door plate is slidably connected to one side of the fixed door plate. The sliding door plate and the fixed door plate are matched to block the channel, radiation warning marks are played in combination with the displayer, the double warning function of visual and physical isolation is achieved, linkage control over the push rod motor is achieved through the pressure switch and the active switch, locking and unlocking of the guide rail are achieved, and it is guaranteed that the sliding door plate is stably closed in the normal state; the sliding door plate can be stably and normally opened in emergency situations or equipment maintenance, a switching locking mechanism of the telescopic end of the push rod motor between the movable hanging ring and the fixed hanging ring achieves convenient switching between the normally-opened state and the normally-closed state of the sliding door plate, meanwhile, a displayer picture is switched through an electric signal of the pressure switch, and the warning effect is further enhanced.

The utility model relates to the technical field of inverters, in particular to a high-gain bidirectional quasi-Z-source T-type three-level inverter. The inverter is composed of a direct-current voltage source Vg, filter capacitors Cg1 and Cg2, a quasi-Z-source network (composed of capacitors CZ1 to CZ3 and inductors L1 to L8), active switch inductor units SL1 to SL4, switch tubes S01 and S02 and a T-type three-level inverter P. The quasi-Z-source network and the active switch inductance unit form a bidirectional energy transmission path through a specific capacitance polarity and inductance connection mode, and the full-control switch tube and the quasi-Z-source structure cooperate to realize energy storage and release adjustment, so that the inverter realizes voltage gain adjustment and energy bidirectional flow on the basis of multi-level output capability. The bidirectional power converter is suitable for photovoltaic grid connection and other application occasions requiring bidirectional power conversion.

A power supply component comprising a supply node to provide a supply voltage and a supply line to provide a source voltage. The supply line comprising a source node that has a source voltage, and the supply line includes a supply line switch coupled between the source node and the supply node, wherein the supply line switch couples the source voltage to the supply node when the supply line switch is closed. A current diversion component diverts leakage current away from one or both of the source node and the supply node when the supply line switch is open.

Disclosed in the present application are an array substrate (30) and a preparation method therefor, and a flexible electronic paper display panel (10). A first active switch (310) and a second active switch (320) in each pixel unit (710) are respectively arranged on a front surface (41) and a back surface (42) of a flexible base (40), and pixel electrodes (170) are arranged on the flexible base (40) and are located in the pixel units (710); and first sub-data lines (511), the first active switches (310), the second active switches (320), and the pixel electrodes (170) are connected in sequence. By means of the design, the problem of grayscale reduction when the flexible electronic paper display panel (10) is bent is avoided, such that a display effect is improved.

An apparatus and method for delivering power to the gate-drivers used in switching power conversion devices. In a bootstrapping network gate drivers are cascaded between a high-side and a low-side. Each gate driver controls a bidirectional active switch along a synchronous bootstrapping power path. The bootstrapping power path contains at least two bias voltage supplies to provide for bidirectional charge flow to the gate drivers, so that balanced delivery of charge can be maintained. A bias voltage supply on the high-side is line-referenced and provides charge to the bootstrapping network in a downward flowing direction.

A power supply component includes a supply node providing a supply voltage and a supply line providing a source voltage. The supply line includes a source node having a source voltage, the supply line including a supply line switch coupled between the source node and the supply node, where the supply line switch couples the source voltage to the supply node when the supply line switch is closed. When the supply line switch is turned on, the current diverting component diverts the leakage current away from one or both of the source node and the supply node.

The utility model discloses a power supply connector, which comprises an insulating shell, a power supply transmission assembly arranged in the insulating shell and at least one signal triggering mechanism arranged in the insulating shell, and the insulating shell is provided with a slot for an insertion piece to insert. The utility model also discloses a signal triggering mechanism which comprises an active switch terminal and a passive switch terminal which are independent from each other. The active switch terminal is configured to make electrical contact with the insert only after the power transmission assembly is in electrical contact with the insert, and the passive switch terminal is configured to make electrical contact with the active switch terminal only after the active switch terminal is in electrical contact with the insert.