359 results about "Rectifier diodes" patented technology

An electronic assembly includes a semiconductor device package. The semiconductor device package includes a conductive structure package base, a first terminal configured to be connected to an inductive load, and a second terminal configured to be connected to a common node or circuit ground. The package also includes an enhancement mode transistor and a depletion mode III-N transistor in a cascode configuration. The enhancement mode transistor, the IC controller and the gate driver are monolithically integrated on a common silicon substrate, in which an anode of the rectifier diode is connected to a drain of the enhancement mode transistor, and a cathode of the rectifier diode is connected to a voltage input terminal of the IC controller, and the energy storage capacitor has a first terminal connected to the cathode of the rectifier diode and a second terminal connected to the conductive structure package base.

The invention relates to a composite function converter suitable for a multi-phase high-speed permanent magnet direct-current generator. An uncontrolled rectifier bridge arm is formed by connecting two high-frequency rectifier diodes in series; the controllable rectifier bridge arm is formed by connecting two IGBTs (Insulated Gate Bipolar Translator) with antiparallel diodes in series; an upper tube IGBT collector of the controllable rectifier bridge arm and a cathode of an upper tube diode of the uncontrolled rectifier bridge arm are connected in parallel with an anode of the intermediate bus capacitor; the emitting electrode of the lower tube IGBT and the anode of the lower tube diode of the uncontrolled rectifier bridge arm are connected in parallel with the cathode of the intermediate bus capacitor; the emitting electrodes of the upper tubes IGBT of the controllable rectifier bridge arms are respectively connected to the output end of the generator; the anodes of the upper diodes of the uncontrolled rectifier bridge arms are respectively connected to the other output ends of the generator; the interleaved BUCK module is connected between the intermediate DC bus capacitor and the load, and the BUCK control unit is used for controlling the interleaved BUCK module to operate; and the barring control unit is used for controlling the controllable rectifier bridge arm to realize a generator barring function.

The invention discloses a high-gain bridgeless series output rectifier based on low-voltage energy recovery, and relates to the technical field of converters. A circuit of the high-gain bridgeless series output rectifier comprises two secondary boosting units, a first secondary boosting unit composed of a rectifier diode DR1, a diode D1, a supplementary diode DS1, a switching tube S1, an intermediate capacitor Cm1 and an intermediate inductor LS1, a matching inductor L, an output diode Do1, an output capacitor Co1 and an output capacitor Co2, and the high-gain bridgeless series output rectifier is used for electric energy conversion in an alternating current positive half input period; a rectifier diode DR2, a diode D2, a supplement diode DS2, a switching tube S2, an intermediate capacitor Cm2 and an intermediate inductor LS2 form a second secondary boost unit, and the second secondary boost unit is matched with an inductor L, an output diode Do2, an output capacitor Co1 and an output capacitor Co2 and is used for electric energy conversion in an alternating current negative half input period. According to the invention, a part of diodes of the rectifier bridge are canceled, so that low input voltage loss caused by the conduction voltage drop of the diodes of the rectifier bridge and the conduction loss of the diodes are avoided.

An isolated switching power supply circuit is compact, high-efficiency, and low noise. It includes a transformer T1 which has a primary winding wound with NP turns and a secondary winding wound with NS turns, a drive switch Q1 and an active clamp switch Q2 configuring a primary side half-bridge, a boost capacitor CBULK1 that charges a discharge energy of the transformer, rectifier diodes D1 and D2 connected in series, a tank capacitor CT1, and an output capacitor COUT1. A secondary side winding voltage, when the drive switch Q1 or the active clamp switch Q2 is on, is held in the tank capacitor CT1, and by superimposing the secondary winding voltage, when the drive switch Q1 or the active clamp switch Q2 is off, on the voltage held in the tank capacitor CT1, the configuration is such that output voltage VOUT equals boosted voltage VBULK times (NS divided by NP).

The wide-load radio frequency rectification circuit comprises an impedance matching network, a dynamic compensation network, a first rectification diode and a straight-through filter, the output end of the impedance matching network is connected with one end of the straight-through filter and one end of the first rectifier diode, the other end of the first rectifier diode is connected with the dynamic compensation network, and the output end of the straight-through filter is connected with a load; the quarter-wavelength microstrip line is connected with one end of the first wavelength-adjustable microstrip line and one end of the second wavelength-adjustable microstrip line, the other end of the second wavelength-adjustable microstrip line is connected with one end of the second rectifier diode, and the other end of the second rectifier diode is grounded. In the dynamic compensation network, a quarter-wavelength microstrip line, a first wavelength-adjustable microstrip line and a second wavelength-adjustable microstrip line form a T-shaped network to change the impedance of a second rectifier diode so as to compensate an imaginary part of a first rectifier diode, thereby suppressing impedance fluctuation caused by load change.

The invention relates to a switch machine driving system, and relates to the technical field of rail transit, and a switch machine drives a turnout to switch positions through rotation in a positioning or reverse direction; the point switch outputs state information and fault information to the driving system; the switch machine driving system comprises a control module and a turnout position representation module, wherein the turnout position representation module comprises a positioning acquisition circuit and an anti-position acquisition circuit; the positioning acquisition circuit comprises a first positioning acquisition branch and a second positioning acquisition branch which are connected in parallel, the anti-position acquisition circuit comprises a first anti-position acquisition branch and a second anti-position acquisition branch which are connected in parallel, and all the acquisition branches are provided with rectifier diodes; the positioning acquisition circuit and the anti-position acquisition circuit acquire voltage signals output by the point switch, and the control module is connected with the positioning acquisition circuit and the anti-position acquisition circuit to acquire the state and fault information of the point switch. According to the switch machine driving system, the reliability of the system is enhanced in the mode that the state of the switch machine is collected through multiple paths of signals.

The invention discloses a multi-parameter acquisition device based on a transformer area intelligent fusion terminal, and relates to the technical field of acquisition and metering. According to the multi-parameter acquisition device, an AC-DC switching power supply provides conventional power supply; the super capacitor module provides standby power supply; the protection circuit is used for protecting alternating current strong current voltage input from the outside and then transmitting the alternating current strong current voltage to the rectifier diode array; the rectifier diode array is used for carrying out rectification processing on the AC voltage after protection processing by using a diode and sending the AC voltage to the AC-DC switching power supply; the voltage transformer converts external power frequency strong current voltage into a weak current signal; the combined current transformer converts the external power frequency strong current into a weak current signal, injects a high-frequency signal into an external power frequency strong current loop and detects a return signal; the metering chip is used for metering weak current signals obtained after voltage and current conversion to obtain acquisition data; and the loop inspection algorithm module is connected with the combined current transformer, and analyzes the return signal to obtain state data of the current loop.

The utility model provides a single-stage bridgeless conversion device integrated with a Buck-Boost circuit and an AHB flyback circuit. The single-stage bridgeless conversion device is characterized by comprising a bridgeless Buck-Boost circuit and an AHB flyback circuit, the Buck-Boost circuit comprises three switching tubes Q1, Q2 and Q3, and one of the switching tubes Q3 is multiplexed as an upper tube of the AHB flyback circuit. According to the single-stage bridgeless conversion device integrated with the Buck-Boost and AHB flyback circuits, the voltage stress of the switch tube Q3 can be obviously reduced, and the stress of the added switch tubes Q1 and Q2 is equal to the input voltage, so that the type selection of the switch tubes is more favorable, a 500V switch tube with high cost performance can be selected, two power diodes are reduced in a main loop, and the cost performance of the main loop is improved. Therefore, the cost of the power semiconductor device can be reduced. Meanwhile, the working principle of the AHB flyback circuit part is completely the same as that of a conventional AHB flyback circuit, Q3 and Q4 can realize ZVS in a full-load range, a secondary side rectifier diode realizes ZCS, the gain change range is large, and wide voltage input and output can be realized.

The invention belongs to the technical field of microwave radio frequency energy conversion, and particularly relates to a high-efficiency high-power rectifier diode device based on a thin barrier AlGaNGaN and a preparation method of the high-efficiency high-power rectifier diode device. The method comprises the following steps: firstly, selecting a substrate layer, and then growing an AlN nucleating layer on the substrate; growing a GaN buffer layer on the AlN nucleating layer; growing a GaN layer on the GaN buffer layer, and growing a barrier layer AlGaN on the GaN channel layer; according to the method, the high-efficiency and high-power rectifier diode device based on the thin barrier AlGaNGaN is obtained by firstly cleaning a test piece, then preparing an ohmic junction and a Schottky junction and finally passivating the surface, high rectification efficiency can be realized through the method, and a leading level is achieved in a known GaN SBD (Schottky Bridge Diode) formed rectifier circuit.

The invention discloses a high-voltage high-power cascade converter which comprises rectifier diodes, a direct-current input bar, an IGBT device, a low-inductance busbar, a cascade output bar, a radiator, a cover plate, a shell assembly and a control assembly. The fuse and the supporting capacitor are detachably connected with the converter through the low-inductance busbar. The radiator is located at the bottom of the shell assembly, a cooling medium connector is arranged on the side portion of the radiator, and the cover plate is used for sealing the top of the shell assembly. The plurality of rectifier diodes and the plurality of IGBT devices are installed on the radiator, and the low-inductance busbar is used for connecting terminals of corresponding polarities of the rectifier diodes and the IGBT devices; the direct current input bar and the cascade output bar are both located above the IGBT device and are arranged in a staggered manner; the DC input bar is connected with the support capacitor through the low-inductance busbar. The cascade output bar adopts a copper bar mode; the control assembly is located above the cascade output row. The invention has the advantages of compact structure, convenience in maintenance, high power and the like.

This disclosure presents an embodiment of a power supply device for a submarine data center. One specific embodiment of the power supply device includes a pre-stage voltage regulator / conversion component, a post-stage DC-DC converter component, and a combined protection circuit. The pre-stage voltage regulator / conversion component includes several parallel single-group voltage regulator branches, each branch connected in series with a varistor and a color-coded resistor. A thin-film capacitor is connected in parallel to the output terminal of the pre-stage voltage regulator / conversion component. The post-stage DC-DC converter component, electrically connected to the pre-stage voltage regulator / conversion component, includes at least two sets of full-bridge DC synchronous rectifier circuits. The combined protection circuit includes a pre-stage combined protection circuit, a post-stage active voltage clamping circuit connected in parallel to the output side of the post-stage DC-DC converter component, and a rectifier diode bridge connected between the constant current input port and the pre-stage voltage regulator / conversion component. The pre-stage combined protection circuit is connected in series to the input side of the rectifier diode bridge. By connecting multiple voltage regulator branches in parallel and combining them with the combined protection circuit, ripple is reduced. This embodiment can improve the power supply stability of the power supply device.

The disclosure relates to AC-DC converter circuits (100, 400, 600), example embodiments of which may comprise: first and second rectifier circuits (101, 102) each having a plurality of input connections (104a-c, 110a-c) for connection to respective first and second sets of windings (105a, 105b) of a generator (106), each input connection (104a-c, 110a-c) connected between a pair of series-connected rectifier diodes (107a1,a2,b1,b2,c1,c2, 111a1,a2,b1,b2,c1,c2) connected between first and second output terminals (108a,b, 112a,b), an output capacitor (109, 113) connected between the first and second output terminals (108a,b, 112a,b); a first output diode (114) connected between the second output terminals (108b, 112b) of the first and second rectifier circuits (101, 102); and a first output switch (115) connected between the second output terminal (108b) of the first rectifier circuit (101) and the first output terminal (112a) of the second rectifier circuit (102).

The utility model relates to a dual high-voltage clamping protection rectification filter circuit for an electric energy meter. The dual high-voltage clamping protection rectification filter circuit comprises three LC filter circuits and clamping high-voltage AC circuits electrically connected with the corresponding LC filter circuits. The clamping high-voltage alternating-current circuit is electrically connected with a rectifier diode; the rectifier diode comprises a forward rectification unit and a reverse rectification unit which are connected in parallel. A filtering common mode unit is electrically connected between the output ends of the three forward rectification units and the output ends of the three reverse rectification units; the filtering common-mode unit comprises an X safety capacitor CN1 and a common-mode inductor LN5 which are electrically connected; and one output end of the filtering common-mode unit is grounded, and the other output end of the filtering common-mode unit is connected with the drain electrode of the MOS tube device QN1 and the RC filtering current-limiting circuit in a branching manner. The device is reasonable in design, compact in structure and convenient to use.

This invention provides a switching power supply, an AC-DC circuit, an input voltage detection circuit, and a method. The first end of the secondary coil of a transformer is connected to the anode of a rectifier diode, and the cathode of the rectifier diode is connected to the positive terminal of a filter capacitor. The second end of the secondary coil of the transformer, the negative terminal of the filter capacitor, and the positive terminal of the sampling capacitor are all grounded. The cathode of the diode is connected to the first end of the secondary coil of the transformer, and the anode is connected to the negative terminal of the sampling capacitor. The negative terminal of the sampling capacitor is grounded sequentially through a third sampling resistor and a second sampling resistor. The common terminal of the third and second sampling resistors is connected to a voltage detection terminal and, through a first sampling resistor, to a reference voltage input terminal. A reference voltage is input to the reference voltage input terminal. The control unit detects the voltage at the voltage detection terminal and calculates the magnitude of the input AC voltage based on the relationship between the AC voltage and the voltage at the voltage detection terminal.

The invention relates to the field of electromagnetic compatibility, and discloses a simplified circuit design method and system for a high-efficiency EMC suppression rectifier diode, and the method comprises the steps: recognizing an interference frequency range of a diode application scene, determining a passive element and an active element of the diode application scene, and building a passive filter of the diode application scene; establishing an active filter of a diode application scene, and combining the passive filter and the active filter to obtain a multi-stage filter; establishing a protection circuit of the multi-stage filter and the target rectifier diode, and constructing a diode integrated circuit of the protection circuit, the multi-stage filter and the target rectifier diode; and simulating the diode integrated circuit to obtain EMC suppression data, calculating a circuit parameter value of the diode integrated circuit, and executing circuit optimization of the diode integrated circuit to obtain a target integrated circuit. According to the invention, the EMC suppression effect of the rectifier diode can be improved.

The invention discloses an integrated rectifier diode module of a three-dimensional spiral structure, and relates to the technical field of power semiconductor devices, the integrated rectifier diode module of the three-dimensional spiral structure comprises an electrical function unit and a thermal management unit which are integrated in a monolithic mode, and the electrical function unit and the thermal management unit are coaxially arranged to achieve electric-thermal collaborative optimization. The specific structure is as follows: the electrical function unit comprises a substrate layer, an N + GaN conduction layer, an N-GaN drift layer and a three-dimensional spiral super-junction structure embedded in the N-GaN drift layer, the substrate layer, the N + GaN conduction layer, the N-GaN drift layer and the three-dimensional spiral super-junction structure are sequentially stacked from bottom to top, the three-dimensional spiral super-junction structure is formed by alternately and spirally arranging P-NiO regions and N-GaN regions, and charge balance is achieved; the electrical function unit further comprises an anode electrode and a cathode electrode, the anode electrode is arranged at the top of the three-dimensional spiral super-junction structure, and the cathode electrode is arranged on the surface of the N + GaN conduction layer; according to the invention, the power density is improved, the high-power application requirement is met, the device is suitable for the high-power-density field, the environmental adaptability is high, and the stable performance can be kept at different working temperatures.

The invention provides a topology circuit for a converter with a wide voltage range, which is characterized by comprising a half-bridge driving circuit and a QR control circuit, the half-bridge drive circuit comprises a first transistor (Q1), a second transistor (Q2), a first blocking capacitor (C1), a second blocking capacitor (C2), a main transformer (T1), a first secondary side rectifier diode (D2), a second secondary side rectifier diode (D3), an energy storage inductor (L1) and a smoothing capacitor (C4). The QR control circuit comprises a control chip (U1), and the control chip (U1) is connected with the half-bridge drive circuit and is externally connected with a measuring chip (U2) at the same time. According to the topological circuit for the converter with the wide voltage range, the zvs soft switching conduction capability can be realized on the premise of adjusting the wide voltage range, the application range of the converter is expanded, and the adaptability of the topological circuit in application is expanded.

The utility model discloses a secondary overlapped multi-group series rectification output circuit of a switching power supply. The secondary overlapped multi-group series rectification output circuit comprises a transformer and at least three series rectification circuits electrically connected with the transformer, each rectification circuit comprises a rectification diode, an RC absorption circuit, a capacitor filter circuit and a dummy load circuit; the transformer is provided with at least three secondary windings; the corresponding end of the rectifier diode is electrically connected with the corresponding ends of the secondary winding of the transformer, the RC absorption circuit, the capacitor filter circuit and the dummy load circuit respectively; wherein the rectifier diode is used for converting alternating current on the secondary winding side of the transformer into direct current; the RC absorption circuit is used for absorbing a backward voltage peak of the rectifier diode; the capacitor filter circuit is used for smoothing the output voltage; and the dummy load circuit is used for stabilizing the output voltage under a low load condition. According to the utility model, the problems of high withstand voltage and EMC of the rectifier diode are effectively solved.

The invention relates to the technical field of switching power supply circuits, in particular to a BOOST switching power supply circuit applied to a high step-up ratio. The BOOST switching power supply circuit applied to the high step-up ratio comprises an input filtering module, a first-stage step-up module, a second-stage step-up module and a control module, the input filtering module comprises an input capacitor Cin and is used for filtering an input voltage Vin; the first-stage boost module comprises a boost inductor L1, a switch tube MOS Q2, a rectifier diode D1 and an output capacitor Co1. The boost circuit is composed of an input capacitor Cin, a boost inductor L1, a switch tube MOS Q1, a switch tube MOS Q2, boost rectifier diodes D1 and D2, output capacitors Co1 and Co2 and a control chip U1, one chip is used for controlling a two-stage BOOST boost circuit, control is simple, the number of parts is small, large-current output and high-step-up-ratio boost can be achieved, and in a power supply circuit using a low-voltage battery or a solar rechargeable battery product, the boost circuit can be applied to a power supply circuit. And the use value is high.

The invention relates to the technical field of control equipment, and discloses a three-redundancy-based electromagnetic valve control system which comprises a time delay relay circuit, a DC / DC and anti-reverse circuit and a three-redundancy control circuit, the time delay relay circuit comprises a first time delay relay, a first rectifier diode, a first control module, a second control module and a third control module, and the first control module, the second control module and the third control module are connected in parallel. The first control module, the second control module and the third control module are respectively connected with three groups of different electromagnetic valve control signals, and any group of electromagnetic valve control signals effectively control the first delay relay to work; the DC / DC and anti-reverse circuit comprises a first DC / DC conversion circuit and a first ideal diode; the triple-redundancy control circuit comprises a fourth control module, a fifth control module and a sixth control module which are connected in parallel, one end of the first control module is connected with the negative electrode of the electromagnetic valve working power supply, the other end of the first control module is connected with the other end of the electromagnetic valve, and any group of electromagnetic valve control signals effectively control the electromagnetic valve to work. By adopting the method, three-redundancy control can be realized, and the reliability of an electromagnetic valve control system is improved.

The present invention relates to the technical field of railway turnout testing, specifically a turnout simulation test detection system, including a DC turnout detection circuit and an AC turnout detection circuit, which are used to perform turnout simulation test detection on DC turnouts and AC turnouts respectively; the DC turnout detection circuit is composed of four DC branches, a DC positioning reverse position indicator light, a first rectifier diode, a high and low frequency trigger relay, and a DC load bulb. The turnout simulation test detection system involved in the present invention integrates the simulation tests of the two most commonly used turnouts on the railway, and can basically simulate the test of the turnouts on the railway; it can meet the simultaneous test of the action and indication of the turnout, reduce the time of repeated operations, and the wiring is connected in sequence according to the position, which can effectively prevent the reverse line and reduce errors, thereby improving the test efficiency.

An insulation and voltage resistance detection circuit comprises an input port which is connected with a rectifier diode through a resistance network and is used for carrying out current limiting and voltage dividing processing on an input signal; the rectifying circuit is used for carrying out full-wave rectification on an input signal by utilizing a plurality of diodes and outputting stable direct-current voltage; the filter circuit comprises a plurality of filter capacitors and is used for carrying out smooth filtering on the rectified direct-current voltage and providing stable output voltage; the optical coupler U1 is used for realizing electrical isolation between an input signal and an output power supply and avoiding high-voltage or noise conduction; the current limiting circuit comprises a current limiting resistor and is used for controlling the current passing through the optocoupler or the LED and protecting the device; by introducing a multi-stage resistor current limiting circuit, a diode rectification circuit, a filter capacitor circuit and an optical coupler isolation circuit, efficient power supply control is realized.

The invention discloses a boron diffusion manufacturing process method, which comprises the following steps of: after a boron diffusion window is formed, pre-growing or depositing a layer of sacrificial silicon oxide insulating dielectric film on the surface of a silicon wafer, depositing boron on the surface of the silicon wafer at high temperature, and further forming a layer of silicon oxide insulating dielectric film containing high-concentration boron on the surface of the silicon wafer during boron deposition, and removing the high-concentration silicon oxide insulating dielectric film by wet etching, and partially or completely removing the pre-grown or deposited sacrificial silicon oxide insulating dielectric film, and then propelling boron deposited on the surface of silicon to a required junction depth position at a high temperature, and forming required impurity distribution. The method can prevent formation of difficult-to-etch silicon oxide after high-temperature propulsion, can inhibit precipitation of high-concentration boron, and can be widely applied to manufacturing of power semiconductor chips such as Schottky diodes, fast recovery diodes, rectifier diodes and the like and photovoltaic diodes.

The invention discloses a wide dynamic range rectifier based on an automatic power distribution mechanism. The wide dynamic range rectifier comprises a high-power sub-rectifier and a low-power sub-rectifier, the high-power sub-rectifier comprises a high-power rectification trunk and a high-power rectification branch; the low-power sub-rectifier comprises a low-power rectification trunk and a low-power rectification branch; through the synergistic effect of a threshold switch control circuit and a tunable matching network arranged in a low-power rectification branch, the low-power rectification branch provides inductive impedance in a low-power state to compensate the inherent capacitive impedance of a low-power rectification diode, and presents a high-impedance state in a high-power state to turn off a low-power sub-rectifier. Therefore, the adverse effect of the low-power sub-rectifiers on the high-power sub-rectifiers is avoided while high-efficiency energy conversion in the low-power interval is ensured, and the overall rectification efficiency in the high-input power interval is remarkably improved.

The invention discloses a high-voltage capacitor electricity-taking alternating current power supply, which comprises an electricity-taking circuit connected with an external high-voltage line so as to receive electric energy of the high-voltage line and output the electric energy after the electric energy is subjected to isolation and voltage reduction through a transformer; the output end is connected with the output side of the power taking circuit and outputs alternating current to an external output load; the rectifying circuit is composed of an alternating current filter capacitor C2, a rectifying diode Z and a capacitor C1; the rectifier diode Z is connected with the output end of the power taking circuit, and the capacitor C1 is connected to the output end of the rectifier diode Z to convert alternating voltage into direct voltage; the voltage stabilizing circuit is connected with the rectifying circuit, and a consumption load is arranged in the voltage stabilizing circuit; therefore, the stability of the output voltage of the output end is controlled. According to the high-voltage capacitor electricity-taking alternating-current power supply, the mode that alternating current is reversely controlled through direct current is adopted, alternating-current sine-wave electricity stable-voltage output is achieved, the circuit complexity is greatly reduced, and the circuit conversion efficiency is greatly improved.

The utility model belongs to the field of new energy, and discloses a power circuit for new energy photovoltaic high-voltage transmission, which is arranged between a power supply input end and a power supply output end. The power circuit comprises a high-frequency coupling transformer, a switching tube, a rectifier diode and a coupling capacitor, the high-frequency coupling transformer comprises a primary winding and a secondary winding, the secondary winding adopts the rectifier diode for rectification, and the primary winding is connected with the power input end, the drain electrode of the switching tube and one end of the coupling capacitor; the secondary winding is respectively connected with a GND, an anode of the rectifier diode and the other end of the coupling capacitor, the other end of the rectifier diode is connected with a power supply output end, a grid electrode of the switch tube is connected with emitting electrodes of two triodes, base electrodes of the two triodes are jointly connected with a PWM output end of a signal control chip, and the two triodes are respectively N type and P type. The power circuit has the advantages that the stress of the power device is low, the size of the device is small, and equipment can be effectively prevented from being damaged.

The invention relates to the technical field of electric appliance control circuits, and discloses a non-isolated zero-crossing detection and commercial power voltage detection multiplexing low-cost simple circuit, which comprises a rectifier diode D3301 of which the cathode is connected with a live wire of a commercial power input end, and the anode is connected with a first resistor R3301; the first resistor R3301, the second resistor R3302 and the third resistor R3303 are connected in series. Through a sampling link formed by a rectifier diode D3301 and series voltage dropping resistors R3301, R3302 and R3303, a zero-cross detection signal is provided for an interruption input end VT at the same time, and a voltage detection signal is provided for an analog input end AD through a divider resistor R3304 and a filter capacitor C3301, so that multiplexing of two types of detection is realized under a non-isolation structure, commercial power detection can be completed without an optocoupler or an isolation transformer, and the detection efficiency is improved. Therefore, devices are reduced and circuits are simplified.

The invention discloses a rectifier-diode-free single-inductor boost energy recovery circuit and a control method thereof, and relates to the technical field of electric energy conversion circuits. The circuit topology comprises a switching tube S1, a switching tube S2, an inductor L, a diode D1, a diode D2 and an output capacitor Co. One end of the alternating current input side is connected with the drain electrode of the switching tube S1, the positive electrode of the output capacitor Co and one end of the load RL; the source electrode of the switching tube S1 is connected with one end of the inductor L and the cathode of the diode D1; the negative electrode of the output capacitor Co is connected with the positive electrode of the diode D1, the other end of the load RL and the positive electrode of the diode D2; the other end of the AC input side is connected with the drain electrode of the switch tube S2, and the source electrode of the switch tube S2 is connected with the other end of the inductor L and the cathode of the diode D2. According to the rectifier-diode-free single-inductor boost energy recovery circuit, by completely eliminating a diode rectifier bridge, energy loss is reduced, and the circuit structure is simplified.

The utility model relates to the technical field of power supply switch control circuits, and discloses a power supply soft switch control circuit of command machine equipment, a first pin and a second pin of a command machine power supply input interface CON9 are connected with a power supply input end, and a fourth pin and a fifth pin of the command machine power supply input interface CON9 are grounded. A transient suppression diode is connected between a first pin, a second pin, a fourth pin and a fifth pin of the commanding machine power input interface CON9, the first pin and the second pin of the commanding machine power input interface CON9 are connected with a source electrode of an MOS tube Q27 through a recoverable safety device F1 and a rectifier diode D2, and a drain electrode of the MOS tube Q27 is connected with a power output end. A voltage stabilizing diode D10 is connected between the source electrode and the grid electrode of the MOS tube Q27; a third pin and a fourth pin of the self-locking switch CON10 are connected with a grid electrode of the MOS tube Q27 through a resistor R27. The device has the advantages of being long in service life and high in use safety.

This invention relates to a circuit board for an ozone generator with frequency tracking functionality. The circuit board includes a frequency tracking circuit comprising an RC oscillation unit, an LC resonant unit, a current sampling unit, a comparison control unit, a voltage divider bias unit, and a frequency limiting protection unit. The LC resonant unit includes a resonant inductor T1 and a resonant capacitor C1, used to drive the ozone sensor. The current sampling unit includes a sampling resistor R8 connected in series in the LC resonant circuit, used to acquire the circuit current signal. The comparison control unit includes a comparator U1, a transistor Q1, a rectifier diode D2, and a filter capacitor C3. The voltage signal from the sampling resistor R8 is rectified by D2 and filtered by C3 before being input to the inverting input of U1. The voltage divider bias unit includes resistors R3 and R6. The RC oscillation unit is connected to the transistor Q1. This invention can adapt to capacitance changes during ozone sensor power-on and operation, automatically tracking the frequency and achieving resonance, while ensuring stable output power, extending device lifespan, and improving ozone generation efficiency and overall reliability.