36 results about "Active switch" patented technology

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 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.

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.

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 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.

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.

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.

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.

The invention discloses a multi-port inverter topology derivation method based on a power flow path matrix, and the method comprises the steps: firstly, converting all components in a circuit, such as a DC source, an AC output, a diode, and an active switching tube, into corresponding elements in the power flow path matrix; converting components through which a plurality of power paths in the multi-port inverter pass into corresponding row matrixes, and further obtaining a power flow path matrix; secondly, modeling based on a power flow path matrix, and converting a circuit constraint of the multi-port inverter into a constraint on the matrix; enabling the matrix to meet all matrix constraints through initialization setting and modification operation of the matrix; and finally, converting the diversified power flow path matrix meeting the constraint condition into an actual circuit topology to obtain a multi-port inverter topology.

The invention relates to the technical field of switch cabinets, and discloses an active switch cabinet arc protection system based on airflow guiding, which solves the problems that bolts of a guide plate in a current switch cabinet are easy to loosen and buckles are easy to fall off under the impact of instantaneous high-pressure airflow caused by electric arcs, and comprises a cabinet body, and a guide mechanism is arranged on the cabinet body. The flow guide mechanism is provided with an opening and closing mechanism, a cabinet door is hinged to the outer side of the cabinet body, the flow guide mechanism comprises a conical hopper located on the inner top wall of the cabinet body, two supporting plates are symmetrically and fixedly connected between the outer side of the conical hopper and the cabinet body, an exhaust frame is fixedly connected to the top of the conical hopper, and the top of the exhaust frame extends to the outer side of the cabinet body. A vertical plate is fixedly connected between the bottom of the conical hopper and the cabinet body, and an arc-shaped flow guide plate is arranged on the outer side of the vertical plate and located below the conical hopper. According to the arc-shaped flow guide plate, instantaneous high-pressure airflow impact can be buffered, and therefore the stability of the arc-shaped flow guide plate mounted on the mounting plate can be conveniently guaranteed.

The application provides a power module, a motor controller, a driving assembly and a vehicle containing the same, and belongs to the technical field of vehicle driving control. The power module comprises at least one of a driving submodule and a generating submodule; the driving submodule is used for connecting a driving motor; the generating submodule is used for connecting a generating motor; the driving submodule and the generating submodule comprise a current conversion bridge; the current conversion bridge is a multi-phase circuit; wherein the current conversion bridge comprises at least one active switch chip and at least one passive freewheeling chip; in at least one bridge arm of the current conversion bridge, the ratio of the total area of the passive freewheeling 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. The power module provided by the embodiment of the application realizes the miniaturization of the power module.

A power converter includes a rectifying diode, an input circuit coupled to the rectifying diode, and an output circuit coupled to the rectifying diode. The converter further includes a subber circuit connected in parallel with the rectifying diode. The snubber circuit includes a controlled switching element which is a charge equalizer active switch configured to turn on at a critical time.

The present invention relates to a method for controlling a clothes dryer (1; 201) equipped with a heat pump system (50) during a drying cycle. The clothes dryer (1; 201) includes: a control unit (UC1); a rotatable processing chamber (9) in which clothes can be placed for drying with a dry airflow; a heat pump system (50) including a compressor (52); a passive switch (70) that is independent of the control unit (UC1) and adapted to cut off the power supplied to the compressor (52); and an active switch (72) that is controllable by the control unit (UC1) for selectively turning the compressor (52) on and off. The method includes the following steps: starting a drying cycle; activating the heat pump system (50) by turning on the compressor (52); rotating the processing chamber (9); assessing whether it is necessary to reverse the rotation direction of the processing chamber (9), and if it is necessary to reverse the rotation direction, assessing whether there are operating conditions of the compressor (52) that would enable the passive switching device (70); if there are no operating conditions, reversing the rotation direction of the processing chamber (9); otherwise, if there are operating conditions, performing the following steps: turning off the compressor (52); reversing the rotation direction of the processing chamber (9); turning on the compressor (52).

A DC-to-DC conversion circuit includes a bridge arm and an on-off module. The bridge arm is connected to a DC input terminal of the DC-to-DC conversion circuit and includes a first sub-bridge arm and a second sub-bridge arm. The first sub-bridge arm includes an active switch. The on-off module is connected in parallel with the first sub-bridge arm. The on-off module is turned on in response to a current of the DC-to-DC conversion circuit being greater than a target current threshold, to shunt a current through the first sub-bridge arm.

This invention belongs to the field of power electronics technology and discloses a DC-DC converter, system, and control method with continuous input current. The converter includes: an input voltage source Vin, an input capacitor Co, a switching transistor S, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a first inductor L1, a second inductor L2, a third inductor L3, a first capacitor C1, a second capacitor C2, a third capacitor C3, an output capacitor C4, and a load R1. The topology of this invention achieves continuous input current, high voltage gain, low switching stress, and high efficiency. Furthermore, the topology is simple, using only one active switch, which simplifies the drive and control circuitry. It is suitable as a front-end converter in a photovoltaic parallel system.

This invention provides a flexible self-rectifying memory, its fabrication method, and its application. In this flexible self-rectifying memory, a polydiallyldimethylammonium chloride buffer switch layer serves as the active switching medium, and its quaternary ammonium salt functional groups provide oxygen ion adsorption sites, promoting oxygen ion aggregation and movement; Ti3C2T x The charge-trapping layer achieves efficient charge trapping through large interlayer spacing and a nanoporous structure. The flexible self-rectifying memory of this invention exhibits tunable self-rectification characteristics and significant crosstalk suppression. The fabrication process of this invention is simple and inexpensive. The advantages of combining the polymer and inorganic layers are not only reflected in the preservation of material flexibility but also in innovative high-performance features such as adjustable self-rectification. The flexible self-rectifying memory of this invention demonstrates great application potential in high-density and ultra-large-scale parallel memory arrays struggling with creeping currents and in learning through neural synaptic plasticity.

A front-end rectifier configured for converting three-phased AC voltage to DC voltage while maintaining unity power factor is disclosed, wherein the rectifier is configured as a two-level converter, in which six active switches (S1-S6) are arranged so that each of the three AC phases (Ph A, Ph B, Ph C) is connected to a positive side and a negative side of a DC-link through a top switch (S1, S3, S5) and a bottom switch (S2, S4, S5), respectively, and wherein the three top switches (S1, S3, S5) and the three bottom switches (S2, S4, S6) are controlled according to a modulation strategy so that, at any given time, for the AC phase (Vmax), for which the voltage is the highest, the top switch is on and the bottom switch is off; for the AC phase (Vmin), for which the voltage is the lowest, the top switch is off and the bottom switch is on; and for the AC phase (Vmin) with the middle voltage value, i.e. the AC phase for which the voltage is neither the highest nor the lowest, the top switch (Sm-T) and the bottom switch (SmB) are modulated at a predefined modulation frequency. Furthermore, a method for controlling active switches (S1-S6) of such a rectifier is disclosed.

The application provides a high-gain DC converter, the converter is composed of two-phase interleaved parallel branches, and comprises an input power supply, a main switch, an active clamping switch, a resonant inductor, a three-winding coupled inductor unit, an energy storage capacitor, a freewheeling diode, an output diode and a load unit. The primary winding of the two coupled inductor units serves as an input filter inductor, and the secondary winding is cross-coupled to form a CLLL voltage doubling unit together with the energy storage capacitor and the freewheeling diode, thereby realizing high-gain output. The converter realizes soft switching operation of all active switches by setting the complementary conduction and dead time of the main switch and the clamping switch, and constructs a resonant circuit, thereby reducing the switching loss. The application has the characteristics of high voltage gain and high efficiency, is suitable for a power processing unit (PPU) of an electric propulsion system, and can effectively meet the stringent requirements of a high-voltage and high-power module inside the PPU on wide-range input, high-gain output and high-efficiency energy conversion.

The invention provides a transient inductance voltage regulator for secondary side energy recovery and a control strategy thereof to solve the problems that an existing transient inductance voltage regulator is low in efficiency and large in loss. According to the invention, the active switch is additionally arranged on the secondary side, the control circuit can be switched between a traditional staggered Buck VRM and a TLVR, the circuit works in a staggered Buck VRM mode in a steady state, and high steady-state efficiency is realized; in a transient state, the circuit works in a TLVR mode, and high dynamic performance is realized; and when the auxiliary switch tube is switched off, the secondary current can flow back to the power supply through the auxiliary diode, and the energy stored by the secondary side in the transient state is recovered to the power supply, so that the overall operation efficiency of the circuit is improved. The method has the advantages of high efficiency, stability, reliability, simplicity in control and the like.

The application discloses a kind of micro DI input detection method and device, method includes: input module obtains passive or active switch quantity signal, and transmission is to input detection register protection module;Input detection register protection module carries out signal conversion and detection to switch quantity signal, and according to the difference of input switch quantity signal, different voltage output is obtained to output control module;According to the different voltage value output to output control module, output control module outputs the level of current switch quantity conversion output result acquisition.The application builds a set of low-power consumption, high reliability, low cost, small size micro DI input detection device by simple separation component, and realizes passive switch quantity and active switch quantity compatible input detection by the device.

The invention belongs to the technical field of electronic test instruments, and particularly relates to a signal generator analog channel structure and method for reducing signal floor noise, and the structure is sequentially connected with a first-stage amplification unit, a first attenuation network, a second-stage amplification unit, a second attenuation network and a power amplification unit along a signal transmission direction. Wherein the second-stage amplification unit adopts N operational amplifiers (N is greater than or equal to 2) which are arranged in parallel, and the noise density of the input reference voltage is remarkably reduced by utilizing the synchronous amplification effect of the parallel operational amplifiers on signals and the averaging effect on internal noise. In addition, each attenuation network adopts a passive resistance network controlled by a relay, so that nonlinear distortion and power supply noise introduced by an active switch are avoided. Through the synergistic effect of preceding-stage high-gain distribution, parallel operational amplifier noise reduction and relay passive attenuation, the overall bottom noise of an analog channel is effectively reduced, and the signal-to-noise ratio during small signal output is remarkably improved.

Embodiments herein relate to countermeasures for electromagnetic (EM) probing attacks of voltage regulators (VRs) for cryptographic circuits. In one aspect, the clamp strength of a VR such as a switched-capacitor VR is dynamically and randomly modulated. The VR can include switches for transferring charge, where a switch can include a number of sub-switches in parallel, and the number of active switches is randomly varied to randomize the EM emissions. In another aspect, a capacitor of a VR is formed in a metal wiring layer of an integrated circuit package such as a top metal layer, where the capacitor has inter-digitated electrodes which cancel out current flows to / from the electrodes to reduce EM emissions. In another aspect, a resonant VR includes circuitry to detect changes in current or voltage which correlates with a change in its resonant frequency due to EM probing.

The invention relates to a wireless charging optimization method and system. According to the method, a wireless induction electric energy transmission circuit impedance model is constructed, a time domain periodic steady-state problem is converted into a frequency domain linear matrix equation for solving output power, and the process comprises the following steps: selecting a harmonic wave truncation order, and defining the harmonic wave order in a range determined by the harmonic wave truncation order; constructing a diagonal impedance matrix of a resistor, an inductor and a capacitor in the wireless induction power transmission circuit and a Toeplitz impedance matrix of an active switch; a total impedance matrix equation is constructed based on a wireless induction power transmission circuit topology and an element impedance matrix, a system equation is constructed by using a total impedance matrix and a direct current voltage vector, and nonlinear reflection impedance is solved through an iteration method; calculating output power and output power volatility under different coupling coefficients by using the nonlinear reflection impedance; and optimizing target design parameters of the wireless induction electric energy transmission circuit by taking minimization of the power fluctuation ratio as a target so as to stabilize the output power in the charging process.