62 results about "Circuit Failure" patented technology

The application provides a semiconductor device and a preparation method thereof, wherein the gate dielectric layer comprises a first edge region and a first central region, the thickness of the first edge region is greater than that of the first central region, and the source-drain region is formed in the semiconductor substrate on both sides of the gate dielectric layer. Since the thickness of the first edge region of the gate dielectric layer is greater than that of the first central region, the electric field intensity of the first edge region of the gate dielectric layer can be reduced, the longitudinal electric field intensity near the source-drain region is reduced, the injection energy of the electrons is reduced, the difficulty of the electrons to inject into the gate through the first edge region of the gate dielectric layer is increased, the hot carrier injection effect of the device is improved, the reliability of the device is improved, and the risk of circuit failure in the device is reduced.

This utility model discloses a floor-standing networked signal cabinet for controlling traffic lights, relating to the field of control cabinet technology. The utility model includes a protective cabinet, a control cabinet, and an adjustment component. The adjustment component includes two baffles; a connecting shaft connects the two baffles; a semi-circular plate is fixed to the side of the connecting shaft; a cylindrical plate is fixed to the bottom of the semi-circular plate; a partition is fixed to the inner wall of the control cabinet; a circular groove is formed on the surface of the protective cabinet; an air inlet slot and an air outlet slot are formed through one inner wall of the control cabinet; the other inner wall of the control cabinet is connected to the interior of the protective cabinet; a fan is rotatably mounted on the partition. This utility model uses a sliding adjustment component to move the baffles, and simultaneously, the baffles drive a gear through a rack and pinion to change the direction of airflow, thereby regulating the humidity inside the protective cabinet. This prevents excessively low humidity from causing static electricity in electrical appliances, circuit failures, and data loss, or excessively high humidity from causing rust, short circuits, aging, and battery leakage in electrical appliances.

This utility model discloses a circuit breaker, belonging to the field of low-voltage electrical technology. The circuit breaker includes a contact structure and a leakage current test circuit. The contact structure includes a first moving contact and a conductive rod electrically connected to the first moving contact. The leakage current test circuit includes a test resistor and a spring contact. The test resistor has a first lead, and the first lead and the end of the conductive rod facing the spring contact are both abutted against and electrically connected to the first surface of the spring contact. The circuit breaker provided by this utility model adopts a lap-connection power extraction method to electrically connect the test resistor and the first moving contact, so as to realize the leakage current test circuit extracting power from the first end of the test resistor, effectively reducing the use of wires, that is, reducing the number of wire connection points and soldering points, reducing the risk of short circuit and leakage current test circuit failure, facilitating assembly, and effectively reducing manufacturing costs.

The application provides a data reading circuit of an MRAM chip, comprising: a to-be-tested storage unit, a first gating transistor connected in series with the to-be-tested storage unit, a reference unit, a second gating transistor connected in series with the reference unit, and a readout amplifier, wherein the reference unit has three optional reference resistance branches, including a working mode branch, a first test mode branch and a second test mode branch, the working mode branch is used for reading data of the to-be-tested storage unit, the first test mode branch is used for screening out fixed failure units and high-resistance state out-of-range failure units with an open-circuit failure type, and the second test mode branch is used for screening out fixed failure units and low-resistance state out-of-range failure units with a short-circuit failure type.

The embodiment of the application discloses a kind of power converters, it is related to power electronics field, it is solved in the short-circuit failure of switch tube that occurs in the situation of three-level inverter road and direct current bus connection, how to make the switch tube in three-level inverter circuit can be safely turned off, avoid the occurrence and spread of serious fault problem.Power converter in inverter circuit includes first switch and inverter bridge arm, inverter bridge arm includes first switch tube to fourth switch tube connected in series, the midpoint of inverter bridge arm is the connection point of second switch tube and third switch tube.The first end of first switch is used to connect first reference potential electric point, the second end of first switch is connected with the midpoint of inverter bridge arm, first switch is used to be in closed state in the situation of the short circuit of first switch tube, to make the absolute value of voltage difference of second switch tube when the remaining switch tubes except first switch tube in inverter bridge arm are all turned off, second switch tube is less than the withstand voltage of second switch tube.

According to the present invention, each of a plurality of unit converters comprises: a main circuit (30); a control circuit (32) configured to control a plurality of switching elements (11-14) according to control signals received from a control device; a power source (50) that steps down the voltage of a first capacitor (15) to generate a power supply voltage and supplies the power supply voltage to the control circuit (32); and a current-limiting resistor circuit (80) that is disposed between the main circuit (30) and the power source (50) and has a variable resistance value. The power source (50) comprises a second capacitor (51), an overcharge suppression circuit (54), a power supply circuit (56), and a control unit (500). The control unit (500) includes: an overcharge suppression control circuit (53) that controls the overcharge suppression circuit (54) in accordance with the magnitude of the voltage of the second capacitor (51); a current-limiting resistor switching circuit (83) that switches the resistance value of the current-limiting resistor circuit (80) in accordance with the magnitude of the voltage of the first capacitor (15); and a short-circuit failure detection circuit (200) that detects a short-circuit failure of at least one switch of the current-limiting resistor circuit (80) on the basis of the duty of a switching signal and the magnitude of the DC voltage of the first capacitor (15).

A failure detection circuit (103) for detecting an abnormality in an inrush current prevention circuit (102) which includes an inrush resistor (200) and an inrush relay (201) that are arranged in parallel comprises: a resistive voltage divider circuit (301) that divides a voltage across both ends of an inrush current prevention circuit (102); an amplification circuit (302) that amplifies the difference between the voltages obtained by dividing the voltage by the resistive voltage divider circuit (301); a peak hold circuit (303) that performs temporary peak hold of the voltage divided by the resistive voltage divider circuit (301); and a control unit (304) that, on the basis of respective signals output from the amplification circuit (302) and the peak hold circuit (303), detects a disconnection failure of the inrush resistor (200), a short-circuit failure of the inrush relay (201), and an open failure of the inrush relay (201), wherein the amplification circuit (302) and the peak hold circuit (303) are connected in parallel between the resistive voltage divider circuit (301) and the control unit (304).

The utility model discloses a kind of double screw wiring formula circuit breaker, including circuit breaker, the inside of circuit breaker is equipped with wiring terminal subassembly;The wiring terminal subassembly includes fixed plate, and first chuck and second chuck are equipped on the fixed plate;Screw rod is equipped on the first chuck and the second chuck;The first chuck and the second chuck face the one side of fixed plate is equipped with semicylindrical convex, and the one side of fixed plate facing the convex is also equipped with antiskid groove.Because two chuck are installed on fixed plate, so that the equipment can have two fixed points simultaneously, further make wire under the action of two chuck and can be more stablely fixed in wiring terminal subassembly, to avoid circuit failure and other problems due to poor contact;Especially, fixed plate is equipped with antiskid groove, chuck is equipped with cylindrical convex, so that while guaranteeing wire being reliably fixed also can reduce the clamping injury of chuck and fixed plate to wire.

This utility model provides a rapid circuit fault detection device, relating to the field of electronic engineering testing technology. It includes: a main body of the detector, with a first connecting wire at the rear; a mounting box at the bottom of the main body, through which the first connecting wire passes; a winding roller inside the mounting box, with the first connecting wire wound around it; and a rotating rod rotatably mounted inside the mounting box. The rotating rod is driven to rotate by manually turning a handwheel, and through the meshing of a worm gear and worm wheel, the winding roller can rotate around the rotating shaft, winding the first connecting wire into the mounting box. This effectively prevents the wire from becoming tangled and piled up, facilitating the carrying and use of the device. Its winding structure is simple and easy to operate, solving the problem that existing circuit fault detection devices, due to their long connecting wires, easily become tangled and piled up, causing inconvenience in carrying and using.

This utility model relates to the field of electric bicycle technology, and in particular to a conductive structure for a battery box, including a male connector and a female connector. The male connector includes a first insulating shell, a first terminal, and a second terminal. Both the first and second terminals include a first conductive connecting piece, a second conductive connecting piece, and a connecting strip, which are integrally formed. The female connector includes a second insulating shell and multiple conductive springs. This utility model, by integrally forming the first conductive connecting piece, the second conductive connecting piece, and the connecting strip, avoids the welding process required in traditional structures. This not only reduces production costs and improves production efficiency but also enhances the stability of the overall structure, ensures good electrical contact performance, and avoids circuit failures caused by welding defects or solder joint fatigue fracture, significantly improving the overall reliability and service life of the product.

In a configuration where power is supplied to the fan and the control unit that controls various devices built into the washing machine by the same switching power supply, the washing machine can continue to operate even if a short-circuit failure occurs in the fan. [Solution] The dishwasher 1 includes an operation control unit 51 that controls the operation of the washing pump 23 and the fan 65, a switching power supply 70 that stops supplying power to the operation control unit 51 and the fan 65 when an overcurrent is detected, and a storage unit 53 that stores fault information when an overcurrent is detected when the switching power supply 70 supplies power to the fan 65 during the steam recovery process. The switching power supply 70 has an automatic recovery function that restores power supply to the control unit 50 after power supply has been stopped due to overcurrent detection. If fault information is stored in the storage unit when power supply is restored, the control unit 50 controls the switching power supply 70 to prohibit power supply to the fan 65.

The utility model discloses a waterproof operating box for elevator and the cage wall matched with it, including cage wall casing, operating device fixed setting in the inner end surface of cage wall casing, the side end surface bottom of operating device is fixedly set with waterproof device, and the bottom through fixed connection of waterproof device and operating device is fixed with fixed wire. In the utility model, the waterproof box casing is used to the lower side lead -in mode of cage wall casing and enters the inside of operating box upper shell, when the well hole is flooded, the water will drip along the cage wall casing and the waterproof box casing of its bottom and the well hole pit, will not enter the cage wall casing, causes operating box upper shell to be flooded, and the short -circuit failure is caused, effectively improve the waterproof property and the service life of operating box upper shell of subsequent use.

This invention relates to the field of precious metal special material preparation and processing technology, and discloses a composite special gold wire suitable for high-temperature and high-density packaging and its preparation method. The gold wire contains the following components by weight percentage: 0.5% to 1% Pd, 0.05% to 0.1% Al, 0.005% to 0.015% Ga or Ge, 0.001% to 0.005% La, Ce, Yb or Sm, with the balance being pure gold. The gold wire is coated with a layer of thermosetting resin by impregnation and baking, and an inorganic phase layer mainly composed of silicon dioxide is coated on the thermosetting resin by electrophoretic deposition. This invention achieves a strong bond between the silicon dioxide inorganic phase layer and the gold wire by coating the gold wire with a thermosetting resin layer, making it less prone to detachment. Furthermore, by optimizing the core material composition, the resulting composite special gold wire exhibits superior long-term reliability when bonded to aluminum pad electronic components under high-temperature and complex service environments compared to conventional gold wires. Moreover, the wire arc maintains excellent rigidity in multi-pin, 3D stacked packaging environments, reducing short-circuit failures caused by physical contact or arc discharge between adjacent gold wires.

The application discloses an electromechanical brake and a vehicle, and relates to the technical field of brakes, in particular to an electromechanical brake characterized by comprising: a shell; a circuit board arranged in the shell; an actuator arranged in the shell; a force sensor for sensing a reaction force received by the actuator, wherein the force sensor is directly electrically connected with the circuit board; the circuit board, the force sensor and the actuator are distributed along an axial direction, and the force sensor is used for converting the reaction force into an electric signal and transmitting the electric signal to the circuit board. According to the technical scheme of the application, the force sensor is directly arranged on the circuit board, the distance between the force sensor and the circuit board is shortened, the trouble of arranging a wire in an actuator assembly is avoided, the connection between the force sensor and the circuit board is more stable, the problems of open circuit and circuit failure do not occur, and the overall structure is more compact, and the installation cost and assembly difficulty are low.

This technology provides a way to suppress the leakage of output current from the voltage conversion unit to the energy storage unit through the element unit when switching from the charging state of the energy storage unit via the voltage conversion unit to the discharge state of the energy storage unit via the element unit. [Solution] The power supply control device 20 comprises a first control circuit 30 and a second control circuit 40. The first control circuit 30 stops the second conversion operation by the voltage conversion unit 25 and causes the voltage conversion unit 25 to perform the first conversion operation when the power supply from the power supply unit 10 to the power line 12 is lost while the voltage conversion unit 25 is performing the second conversion operation. The second control circuit 40 comprises a failure detection circuit 41 and a delay circuit 42. The failure detection circuit 41 outputs a cutoff signal when it determines that there is no failure, and outputs an allow signal when it determines that there is a failure. The delay circuit 42 delays the signal output from the failure detection circuit 41 and outputs it to the element unit 24.

This utility model discloses a high-safety air electromagnetic switch valve, belonging to the field of electromagnetic switch valve technology. It aims to solve the problem that most existing air electromagnetic switch valves utilize electromagnetic attraction or spring mechanical force to complete the switching action. When this structure is used in critical parts, spring mechanical fatigue, reduced elasticity, spring breakage, or circuit failure inevitably lead to malfunctions. The key technical points include a valve body with a second end cap installed at one end. An electromagnetic housing is installed on the outer surface of the second end cap, and two iron cores are installed inside the electromagnetic housing. Coils are wound around the outside of the iron cores. This achieves improved device reliability, allowing it to maintain a single state for extended periods. Even when springs and circuits may fail, its basic function remains unaffected during sudden power outages or other malfunctions, making it safe for use in critical parts control.

The application relates to a heater, an oxygen sensor, an engine and a vehicle. The heater comprises a first heating unit and a second heating unit; the first heating unit is adapted to be connected to an external power source; the second heating unit is arranged in parallel with the first heating unit and is adapted to be connected to the external power source; wherein at least one of the first heating unit and the second heating unit comprises a porous structure. The application aims to solve the technical problem that the internal circuit of the heater of the oxygen sensor in the prior art is easy to gather heat, leading to electric breakdown, and even circuit failure.

To provide a motor stator that eliminates deformation stress on the coil wires. [Solution] A circuit board 9 is mounted at a distance from the motor coil end ring 5 protruding from the motor stator 1 body, grooves 17 and holes 18 for passing multiple motor coil windings are provided in the circuit board, and the ends of the winding ends of the multiple motor coil windings are electrically connected to the surface of the circuit board opposite to the surface facing the motor coil end ring, thereby eliminating deformation stress on the coil wires and reducing rare short-circuit failures. In current AC three-phase induction motor stators, connection parts such as the neutral point are pressed between the coil layers to form the structure, causing deformation stress on the coil wires and leading to rare short-circuit failures.

The present application relates to a short-circuit protection device of a power conversion device. To reduce an increase in cost and a large size of the power conversion device due to short-circuit protection in a case where a plurality of switching elements are connected in parallel. A short-circuit protection device of a power conversion device that supplies power to a load via a plurality of switching element sections connected in parallel is provided. The short-circuit protection device has a short-circuit determination section that outputs a cutoff instruction signal for stopping on-off driving of the plurality of switching element sections in a case where it is determined that there is a short-circuit failure in the plurality of switching element sections using a Rogowski coil that outputs a detection signal indicating a detection result using a sum of currents detected flowing through two or more of the plurality of switching element sections. In the short-circuit protection device, a distance between return lines of adjacent Rogowski coils is long.

The present application relates to the technical field of circuit fault diagnosis, and particularly relates to an inverter open circuit diagnosis method, system and device based on current dynamic scaling. The method comprises the following steps: collecting three-phase stator currents of a three-phase inverter drive system in real time, constructing current characteristic information, and obtaining three-phase stator currents after scaling processing; integrating the three-phase stator currents after scaling processing to obtain positive bias of phase current and negative bias of phase current; setting a judgment threshold, and converting the positive bias of phase current and the negative bias of phase current into current bias state parameters; calculating a fault identification variable according to the dynamic scaling current bias state parameters; matching the fault identification variable with a fault diagnosis judgment rule to locate a specific switch tube position where an open circuit fault occurs. The present application uses the idea of dynamic scaling, overcomes the interference of control factor uncertainty on the diagnosis criterion, completes online fault diagnosis, and provides a solid basis for fault-tolerant control and safety protection of the drive system.

The application relates to the technical field of fault diagnosis, in particular to a method for diagnosing faults of outrigger lines of an aerial work platform, which comprises the following steps: acquiring various types of electrical signals of each outrigger line of the aerial work platform in real time; decomposing the various types of electrical signals into a plurality of IMF components, and decomposing each IMF component into a plurality of wavelet signals; constructing a noise interference confidence degree based on the degree of noise interference on each type of electrical signal of each outrigger, the random fluctuation degree and the proportion of prominent sharp peaks of each layer of wavelet signals, and the correlation degree between each IMF component and the original electrical signal, so as to optimize the soft threshold function in the wavelet threshold denoising algorithm, and then obtain filtered various types of electrical signals, and then judge whether faults occur in each outrigger line in the current monitoring period. The soft threshold function in the wavelet threshold denoising algorithm is optimized, the denoising effect of the electrical signal is improved, and the accuracy of the self-diagnosis of the outrigger line fault is improved.

The application discloses a PCBA circuit failure mode and influence analysis method, comprising: obtaining the input end, the output end and the ground end of each level of the PCBA circuit to be analyzed as the functional interfaces of each level; taking the functional interfaces of each level as analysis objects, completely listing the failure modes of the functional interfaces of each level according to a reference standard; starting from the bottom level of the PCBA circuit to be analyzed, establishing the failure mode mapping of each level of the functional interfaces to the functional interfaces of the previous level until the highest level; merging the same failure modes of each level of the functional interfaces to the functional interfaces of the previous level to obtain the fault modes caused by the internal circuit failure of the PCBA circuit to be analyzed; and performing influence analysis on the PCBA circuit to be analyzed according to the fault modes. The method guarantees the unity of the expression of the PCBA circuit failure modes, improves the operability of the failure mode quantization, and further significantly improves the effectiveness of the practical application of the PCBA circuit failure mode and influence analysis.

This invention discloses an intelligent suspended conveyor device for glass processing, belonging to the field of suspended conveyor technology. To address the problem that when one of the multiple suspended conveyor trolleys in a glass processing intelligent suspended conveyor device malfunctions due to circuit faults or mechanical jamming, the device typically only provides a fault alarm and shutdown, failing to autonomously identify the fault type. This necessitates manual on-site repair and relocation of the faulty trolley, leading to production line interruptions and impacting the continuous production efficiency of glass processing. This fails to meet the high-efficiency, stable, and intelligent production requirements of glass processing production lines. The invention includes a support frame with a track fixedly connected within it. Through the cooperation of multiple sets of fixed frames and multiple rescue structures, this invention can achieve full coverage rescue for faults in both the single-sided and intermediate frames, forming a complete intelligent fault handling system. This improves the overall reliability of the device and reduces operation and maintenance costs and labor intensity.

This invention discloses a phase-by-phase pluggable measuring switch, comprising a base, single-phase switches, and a cover plate. The base has multiple receiving slots, each containing a wiring device. Multiple single-phase switches are connected in parallel within the receiving slots and to the wiring devices. The wiring devices are used to connect the multiple single-phase switches in parallel to form a multi-phase switch. The cover plate is mounted on the base and presses the multiple single-phase switches firmly within the base. The phase-by-phase pluggable measuring switch provided by this invention adopts a modular design, allowing each single-phase switch to be independently controlled for on / off operation and independently pluggable and replaceable. This enables the disconnection of only the faulty phase during a circuit fault, ensuring continuous power supply to the unfaulty phase. It also allows for rapid replacement of single-phase fault modules without requiring a complete power outage, effectively addressing the core pain points of traditional three-phase switches, such as excessively large fault response range, inconvenient single-phase maintenance, and insufficient power supply continuity.

This electrode unit enhances the electroporation effect while suppressing the occurrence of short-circuit failures due to migration. [Solution] An electrode unit 20 for contact with the skin comprises a first electrode 22 and a second electrode 24 that receive power and have a pulsed voltage applied between them, and an insulating base material 23 that is placed between the first electrode 22 and the second electrode 24, wherein at least a portion of the edge of the first electrode 22 is enclosed within the second electrode 24.

The utility model discloses forty-eight line socket sheath assembly relates to the technical field of automobile electrical fittings, including socket sheath main part, the upper surface of socket sheath main part is set up with a plurality of slots. The utility model discloses through setting up socket sheath main part, connecting pin and movable seat, movable seat realizes the connection with connecting pin through the connecting hole of both ends, and, movable seat can overturn under the action of connecting pin, can overturn movable seat and make it with plug interlocking after socket sheath main part is connected with plug, thereby can promote the connection stability between socket sheath main part and plug, to avoid the separation of plug and socket sheath main part and cause the automobile circuit failure, simultaneously, through setting up the clamping groove and the boss, movable seat is after turning over and interlock with plug, and the slot mouth of boss and clamping groove is mutually interlocked, to realize the locking of movable seat position, thereby can further promote the connection stability between socket sheath main part and plug.