314 results about "Circuit Failure" patented technology

The invention discloses a crosslinked polyethylene sheath insulation variable frequency cable, and relates to the technical field of cables, and the cable comprises a cable assembly, a temperature sensing mechanism penetrates through the center part of the inner side of the cable assembly, and a plurality of first heat dissipation assemblies are distributed on the side wall of the cable assembly in the circumferential direction at equal intervals; a second heat dissipation assembly is arranged between every two adjacent first heat dissipation assemblies. The temperature sensor is distributed in the middle of the inner side of the filling layer, and the wire conductors are annularly distributed on the inner side of the filling layer, so that the temperature sensor is arranged in the center between the wire conductors, and the temperature sensor can monitor the temperature generated by the wire conductors; according to the utility model, data can be transmitted to the controller through the sensing circuit, and the wire conductor stops working through analysis and control of the controller, so that the temperature is reduced, and the situation that the circuit cannot be normally used when the circuit fails or overload occurs due to overhigh load is avoided.

Aspects of this disclosure relate to a power amplifier system with symbol-based envelope tracking and fault protection. The system can include a power amplifier and a voltage modulator. The voltage modulator can include switches configured to provide the bias voltage and to provide electric circuit breaker protection. The voltage modulator can include a fault detection circuit that can cause a switch of the switches to provide electric circuit breaker protection in response to detecting a circuit fault. Related methods and voltage modulators are disclosed.

The invention relates to the technical field of analog current fault diagnosis, in particular to an analog current fault diagnosis method based on redundancy feature suppression, which comprises the following steps: acquiring voltage and current data of a circuit output position according to a circuit simulation model, and constructing a circuit fault state data set according to the voltage and current data; performing time-frequency analysis on the circuit fault state data set through discrete wavelet transform; performing redundant feature suppression processing on the hierarchical frequency domain component set to obtain a circuit fault state data feature set; a DCNN-BiLSTM model is constructed, the DCNN-BiLSTM model is trained according to the circuit fault state data feature set, and the DCNN-BiLSTM model meeting a preset fault diagnosis correct rate is output as an analog power fault diagnosis model; and obtaining target to-be-detected voltage and current data, and performing analog current fault diagnosis on the target to-be-detected voltage and current data according to the analog current fault diagnosis model to obtain a corresponding fault type classification result. According to the invention, redundant features can be effectively suppressed, and the accuracy of analog power supply fault diagnosis is remarkably improved.

The invention relates to the technical field of wire harness terminal tension testing, and discloses an automobile wire harness terminal tension testing device which comprises testing equipment, a controller, a display screen and a workbench are arranged on the testing equipment, and a wire harness fixing mechanism, a terminal fixing mechanism and an automobile vibration simulation mechanism are arranged on the workbench; the wire harness fixing mechanism comprises a plurality of bearing frames arranged on the workbench in a sliding mode, electric push rods are installed on the upper surfaces of the bearing frames, an upper pressing plate is fixed to the output ends of the electric push rods, and a driving traction mechanism used for driving the bearing frames to move synchronously is arranged in the workbench. According to the invention, the wire harness fixing mechanism, the terminal fixing mechanism and the automobile vibration simulation mechanism are arranged, and the wire harness fixing mechanism and the terminal fixing mechanism can be used for fixing a wire harness part and a terminal part respectively, so that whether the connection strength of a terminal and a wire reaches the standard or not can be detected; circuit faults caused by connection loosening or falling in the using process are avoided.

Temperature-aware built-in self-test (BIST) control system for selectively controlling activation of BIST circuits in a processor-based system to maintain temperature limit and related methods. The temperature-aware BIST control system is configured to selectively control the number of BIST circuits in the processor-based system activated during the same time based on a temperature limit indicator related to a sensed temperature(s) in the processor-based system and whether such is within a defined temperature threshold(s) and / or temperature change rate threshold(s), which may be programmable. In this manner, the safety manager circuit can dynamically and selectively control the number of BIST circuits activated based on temperature according to the BIST control policy(ies) to reduce or avoid circuit failures due to excess temperature, while at the same time maximizing the staggering (i.e., overlapping) of BIST circuit activations to maximize testing speed.

The invention relates to the technical field of electric car braking, and discloses an electric car braking system based on multi-redundancy guarantee and self-adaptive control and a control method, and the electric car braking system comprises a redundant circuit module, a distributed driving module, an efficient transmission module and a self-adaptive control center. The reliability is remarkably improved, seamless switching of a main circuit and a standby circuit within 50 ms is achieved through a circuit dual-redundancy architecture, the distributed multi-motor driven torque reconstruction algorithm is matched, the braking efficiency retention rate under a single fault is improved, the circuit fault survival rate reaches 100%, the braking efficiency and safety are optimized, the mechanical loss is reduced to 8% or below through an efficient transmission module, and the reliability is improved. The braking distance of 100 km / h is shortened to 29 m, the energy utilization efficiency is improved, the energy consumption is further reduced through the low-friction transmission design, the dynamic adaptability and the collaboration are enhanced, a self-adaptive control center solves the multi-system instruction conflict through multi-sensor fusion and fuzzy PID adjustment with the sampling frequency of 1 kHz, the braking stability is improved by 40% or above, and the braking stability is improved by 20% or above. And the response time of the key control instruction under the emergency working condition is shortened to 75mS.

The application provides a composite low-voltage power cable, and belongs to the technical field of cables.The composite low-voltage power cable comprises an outer shell and a copper strip.Five groups of isolation sleeves are fixed together by a connecting block to ensure stable connection between the isolation sleeves and the copper strip, prevent displacement under external pressure, ensure stability of the copper strip, avoid circuit failure, and support columns are arranged at the centers of the isolation sleeves to provide support force, maintain stability of the isolation sleeves, prevent deformation or loosening, improve stability of the cable under high pressure or bending, spiral blades are clamped in the isolation sleeves to promote air circulation, improve heat dissipation performance, reduce heat accumulation, and reduce the risk of cable failure, the spiral blades also help maintain the shape of the isolation sleeves, prevent deformation caused by external pressure, and the combination of the support columns, the spiral blades and the isolation sleeves improves mechanical stability of the cable, which can withstand greater external impact or tension and ensure stable operation of the cable under high load.

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.

The utility model discloses a wiring terminal with a buffer function, which comprises a wiring terminal body, the top of the wiring terminal body is provided with a plurality of groups of wiring grooves, and the interiors of the plurality of groups of wiring grooves are respectively provided with an anti-falling buffer assembly for preventing a lead from falling off. Wherein the upper base is in threaded connection with a first threaded hole of the lower base through a first bolt, so that a wire is clamped between the upper base and the lower base, the wire can be effectively prevented from falling off in the wiring process, the wiring stability and reliability are improved, circuit faults and potential safety hazards caused by wire falling off are reduced, and the service life of the wire is prolonged. Wherein a buffer piece in the anti-falling buffer assembly enables the lead to absorb and disperse external impact force through elastic deformation of a buffer structure even if the lead is subjected to external tension or vibration after being installed, and plays a role in buffering and protecting the wiring terminal and the lead connected with the wiring terminal.

The invention provides a motor with a self-cleaning function, and relates to the technical field of motors. The driving control mechanism is mounted on one side of the motor main body; the movement control mechanism is mounted at the top of the motor main body; the wind power driving device is connected with the driving control mechanism; the movable suction device is connected with the movable control mechanism and the wind power driving device; the problems that a traditional brush is time-consuming and labor-consuming in cleaning, and a large amount of flying dust is generated in the cleaning process are solved; cleaning is not thorough, heat dissipation of the motor is affected, and if flying dust flies into the motor, part abrasion or circuit faults can be possibly caused, and potential damage to the motor is caused; the system does not need extra power access, and is energy-saving and convenient; the wind wheel rotates along with the motor, the pumping head generates negative pressure suction force and automatically slides in a reciprocating mode, cleaning is convenient, time and labor are saved, the problem of dust flying is avoided, part of heat on the surface of the motor can be discharged, and cooling of the motor is accelerated.

The invention provides a system and a method for removing charges in liquid medicine, which are applied to the technical field of semiconductors. According to the invention, a small-flow liquid medicine circulation pipeline is additionally arranged on a machine table pipeline at the front end of the liquid medicine nozzle, and the liquid medicine circulation pipeline is grounded, so that as long as one path is grounded, charges in the liquid medicine in all branches can be conducted away along the path; therefore, charges in all the liquid medicine in the machine pipeline can be conducted away, the problem that when the liquid medicine nozzle sprays liquid medicine to the surface of a wafer, instantaneous high potential difference is generated, arc discharge defects are formed, and a circuit fails is solved, and the reliability, the electrical performance and the yield of products are improved. In addition, the method is simple and efficient, and is suitable for various liquid medicines, so that the method has relatively high mass production applicability.

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.

The utility model relates to the field of electrical instruments, and discloses a moisture-proof electrical instrument, which comprises a machine body, a terminal plug is detachably mounted on the inner wall of the machine body through a shielding assembly, a connecting wire is fixedly connected to the surface of the terminal plug, and a test pen is fixedly connected to one end, far away from the terminal plug, of the connecting wire. A winding assembly is arranged on the surface of the connecting wire, the shielding plate is elastically connected to the side wall of the inner side of the machine body through a reset spring, and a guide rod is fixedly connected to the inner wall of the machine body. According to the utility model, when a terminal plug is inserted, under the action of the reset spring, the trapezoidal block and the baffle plate can not only facilitate the insertion of the plug, but also elastically press the plug after the plug is installed, thereby effectively preventing moist air from entering the interior of a machine body from a connection part, greatly improving the moistureproof performance of instruments and meters, and prolonging the service life of the instruments and meters. Circuit faults caused by moisture are reduced, and the reliability and stability of instruments and meters are enhanced.

The invention relates to the technical field of battery testing, in particular to an open-circuit failure testing device for a new energy automobile battery in a high-temperature environment, which comprises a rack, a bearing table for placing the battery is fixed on the rack, first side heating plates are symmetrically arranged on two sides of the bearing table, and a second side heating plate is arranged on one side of each first side heating plate. An upper heating plate, a first side heating plate, a second side heating plate and the upper heating plate are arranged above the bearing table, and heating elements for heating a battery are fixedly mounted on the first side heating plate, the second side heating plate and the upper heating plate; the two first side heating plates are arranged on the rack in a sliding mode, the upper heating plate is fixed to a lifting rod, and the lifting rod is driven to ascend and descend through a first driving mechanism arranged on the rack. Therefore, the heating intensity can be conveniently and linearly controlled, different high-temperature environments are accurately simulated, and the efficiency and accuracy of the high-temperature open-circuit failure test of the battery are effectively improved.

The application discloses a temperature sensing type power line and an electric water heater. The temperature sensing type power line comprises a power line body and a power plug. The power line body comprises a first body, an input end of which is connected with the power plug; a second body, an output end of which is used for being connected with an electric device; and a temperature sensing circuit breaking device, which is used for sensing the temperature of the electric device and cutting off the circuit of the power line when the temperature reaches a set value. The input end and the output end of the temperature sensing circuit breaking device are connected with the output end of the first body and the input end of the second body respectively. The temperature sensing type power line has the temperature sensing function, can automatically cut off the circuit when the sensed temperature reaches the set value, plays a role of protecting the circuit and the electric device, guarantees the life and property safety of the user, increases the service life of the power line and the electric device, reduces the probability of the circuit failure, and guarantees the life and property safety of the user.

The utility model discloses a welding-free structure of a power switch, which particularly relates to the technical field of power switches and comprises a power switch upper shell, a switch button is mounted at the top of the power switch upper shell, and a power switch lower shell is arranged at the bottom of the power switch upper shell. A dismounting mechanism is arranged between the power switch upper shell and the power switch lower shell; the disassembly and assembly mechanism comprises a connecting clamping groove which is formed in the surface of the bottom of the upper shell of the power switch. According to the utility model, through the arrangement of the dismounting mechanism, the rapid connection of the upper and lower shells of the power switch is realized, welding operation is not needed in the assembly process, the assembly efficiency is greatly improved, the production cost is reduced, the maintenance time and difficulty are reduced, and the welding-free structure avoids the problems of low installation efficiency and troublesome installation of fasteners such as screws and the like; and the problems of pseudo soldering, solder skips and the like possibly generated in the welding process are avoided, and circuit faults and potential safety hazards caused by poor welding are reduced.

The invention provides a low-conduction-loss direct-current circuit breaker with a fault type judgment function and a judgment method, and belongs to the field of circuit fault detection. In order to solve the problems that in an existing hybrid high-voltage direct-current circuit breaker, the conduction loss of a load commutation switch is high, and a circuit device does not have the fault type discrimination capability, the direct-current circuit breaker comprises a load branch, a multifunctional branch, a main breaking branch and an energy absorption branch. The discrimination method comprises the following steps: in a normal operation mode, a load branch is conducted; the capacitor pre-charging mode operates in parallel to charge the capacitor C; when the circuit is short-circuited, a thyristor turn-off mode is entered, and the T1 is turned off; and entering a load commutation mode, converting the fault current to a main breaking branch, introducing an energy absorption branch, and entering an energy absorption mode. And injecting a controlled RLC oscillation current, analyzing current waveform characteristics to judge a direct current fault type, and performing reclosing or maintenance of the circuit breaker according to the analyzed direct current fault type.

The application discloses a test device, method and system of an integrated gate-commutated thyristor (IGCT) converter valve, the integrated gate-commutated thyristor converter valve comprising at least a first integrated gate-commutated thyristor and a second integrated gate-commutated thyristor connected in series; a charging circuit comprising a first capacitor, a first inductor, a controllable switch and an isolation switch; a charging power supply connected to a first end of the first capacitor through the isolation switch, a second end of the first capacitor connected to a second end of a capacitor, and the first end of the first capacitor connected to a common end of the first integrated gate-commutated thyristor and the second integrated gate-commutated thyristor through the first inductor and the controllable switch connected in series; the charging circuit first charges the first capacitor, and then forms an oscillation loop with the first inductor to provide a charging current for the converter valve; and a current source circuit provides an alternating current and a direct current superimposed together for the common end, so that the test device can simulate a short-circuit failure process of an overvoltage breakdown of an IGCT converter valve.

The utility model relates to the technical field of electrical connection devices, in particular to an arc extinguish chamber of a universal circuit breaker and the universal circuit breaker. The arc-extinguishing chamber comprises a first arc-isolating wall, a second arc-isolating wall, an arc-extinguishing grid group, an arc-extinguishing cover and a sealing structure. The sealing structure comprises a first sealing part and a second sealing part, and the first sealing part is arranged on the side, away from the second arc isolating wall, of the first arc isolating wall and located at the end, close to the cover plate, of the first arc isolating wall. The second sealing part is arranged on the side, away from the first arc-isolating wall, of the second arc-isolating wall and located at the end, close to the cover plate, of the second arc-isolating wall. The first sealing part is arranged on the outer side of the first arc isolation wall, and the second sealing part is arranged on the outer side of the second arc isolation wall, so that a gap between the arc extinguish chamber and the cavity wall at the opening of the arc extinguish chamber mounting cavity can be effectively blocked, electric arcs can be prevented from escaping from the gap at the opening, the safety of the universal circuit breaker is improved, and the service life of the universal circuit breaker is prolonged. And circuit faults are reduced.

The application provides a power circuit, a fault diagnosis method and a power electronic device, and relates to the technical field of power electronics. The technical scheme provided by the application can analyze the fault type based on the diagnosis data of the diagnosis voltage within the preset time before and after the moment when the IGBT fails, so that the fault type of the power circuit can be quickly and accurately located, and the fault maintenance cost of the power electronic device is effectively reduced. Moreover, the power circuit provided by the embodiment of the application has a simple structure and no use limit, and is suitable for different types of power scenarios.

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 utility model belongs to the technical field of power transmission line fault alarms, and particularly relates to a power transmission line grounding fault troubleshooting alarm which comprises a circuit fault detector, a loudspeaker is arranged on one side, close to the upper end, of the front end face of the circuit fault detector, and guide plates are fixedly connected to the two sides of the circuit fault detector. The two guide plates are slidably connected with supporting plates, the two supporting plates are rotatably connected with mounting shafts, a wireless display is fixedly connected between the two mounting shafts, a display screen is fixedly arranged on the outer wall of the wireless display, sliding grooves are formed in the supporting plates, sliding plates are slidably connected in the sliding grooves, and clamping rods are fixedly connected in the sliding plates. Under the action of mutual cooperation of the guide plate, the sliding groove, the sliding plate, the clamping rod, the supporting plate, the clamping hole, the mounting shaft, the wireless displayer and the display screen structure, the display screen can be prevented from being damaged due to collision.

The invention discloses a series-parallel connection combined tantalum electrolytic capacitor, and belongs to the technical field of electronics, limiting sleeves are distributed on a bottom plate, limiting blocks are installed around the inner rings of the limiting sleeves, capacitors are placed in the limiting sleeves and the limiting blocks, and limiting partition plates are installed at the positive and negative ends of the capacitors. Limiting holes for leading out the positive and negative ends of the capacitor are formed in the limiting partition plates, wire limiting pieces are installed at the corresponding positions of the limiting holes, an assembling cavity is formed in the capacitor containing piece, placing frames are symmetrically installed at the upper end of the assembling cavity, the limiting partition plates are placed and connected through the placing frames, and the capacitor in the cavity is accurately pressed and positioned through the limiting partition plates. The capacitor is ensured to be stable and displacement-free in subsequent assembling and using processes, meanwhile, the influence of contact friction and electric field interference on the service life of wires is effectively reduced, circuit faults caused by early aging of the wires are avoided, and the operation stability and the service life of the whole device are remarkably improved.

The application discloses an explosion-proof test circuit based on an IGCT power module, wherein a first plate of a capacitor module is electrically connected with a first end of a first power test unit, a second plate of the capacitor module is electrically connected with a second end of a second power test unit, and the first power test unit and the second power test unit are connected in series. The first power test unit comprises a conductive pad and an insulating pad, or the second power test unit comprises a conductive pad and an insulating pad. In this way, a straight-through short-circuit fault between the first power test unit and the second power test unit is simulated through the insulating pad and the conductive pad, and the voltage information and the current information of the capacitor module when the straight-through circuit fault occurs are verified, so that the straight-through short-circuit fault test can be realized through the explosion-proof test module, a complete converter valve or valve section is not needed to be formed, the experimental condition is simple, and the test is convenient.

The utility model discloses a connector, which belongs to the technical field of electrical equipment and comprises a main body and a wiring terminal. Wherein at least two connecting through holes are formed in the main body; each connecting through hole is provided with a wiring terminal, the wiring terminal comprises a connector part, the connector parts of different wiring terminals are different in outer diameter, the inner diameter of each connecting through hole is matched with the connector part of the corresponding wiring terminal, and the wiring terminal can penetrate through and be clamped in the corresponding connecting through hole. Therefore, the problem that the wiring terminal is difficult to accurately and quickly install to a correct position due to lack of a fool-proof mechanism in the prior art is solved. The wiring terminal is ensured to be accurately installed in place, the problems of circuit faults, signal transmission errors and the like caused by installation errors are avoided, and the electrical connection quality and the signal transmission stability of the connector are improved.

The invention relates to a pressure-sensitive electrode, a pressure-sensitive resistor assembly and a surge protection device, and belongs to the technical field of pressure-sensitive resistors. The surge protection device comprises a piezoresistor assembly, the piezoresistor assembly comprises a voltage-sensitive electrode, the voltage-sensitive electrode comprises an electrode body and a welding boss, the welding boss is arranged on the connecting side of the electrode body, the connecting side of the electrode body is provided with a first blocking groove, and the first blocking groove blocks the periphery of the welding boss in partial or all directions. According to the pressure-sensitive electrode, the pressure-sensitive resistor assembly and the surge protection device provided by the invention, the connecting side of the electrode body is attached to the gasket, the invasion interval is formed between the connecting side of the electrode body and the gasket, and in the invasion interval, the direction from the welding boss to the edge of the electrode body is the invasion direction; the first blocking groove can block a capillary phenomenon water absorption path of liquid water in the invasion direction. Through the arrangement, moisture can be effectively prevented from flowing to the edge of the ceramic of the piezoresistor along the surface of the electrode body, and the piezoresistor is prevented from being affected with damp and being short-circuited and invalid.

The utility model relates to the field of power distribution cabinets, in particular to a power distribution cabinet protection device, which comprises a protection box body, a main body used for providing protection capability for a power distribution cabinet, fixing bolts and reinforcing plates penetrating through two sides of the outer part of the protection box body and used for threaded connection, and outer impact pads are fixedly arranged outside the reinforcing plates. The power distribution cabinet protection device is provided with the reinforcing plate, the outer impact pad, the high-frequency current transformer, the temperature sensor, the inner protection frame, the vacuum arc extinguish chamber and the vacuum fuse switch. The protection box body, the external reinforcing plate and the external impact pad enhance the impact resistance and protection capability of the power distribution cabinet, physical protection is formed outside the power distribution cabinet, then the high-frequency current transformer and the temperature sensor are further arranged on the two sides of the power distribution cabinet components inside the power distribution cabinet body, and the high-frequency current transformer is used for detecting internal circuit faults.

The invention discloses an electromagnetic repulsion switch trigger circuit which comprises an energy storage capacitor, a thyristor group and a repulsion coil which are connected end to end, the thyristor group comprises two groups of thyristors which are connected in series in the same direction, and each group of thyristors is connected with a voltage-sharing resistor in parallel. The invention further provides a fault state detection method, device and equipment of the electromagnetic repulsion switch trigger circuit, and whether faults such as repulsion coil disconnection and thyristor short circuit failure occur in the circuit or not is judged by detecting the voltage at the two ends of the energy storage capacitor, the voltage of the repulsion coil and the voltage of the midpoint of the thyristor group. According to the technical scheme, detection means for abnormities of energy storage capacitor capacitance attenuation, thyristor short circuit failure, repulsive force coil open circuit and the like of the quick switch trigger loop can be realized.

The invention discloses a circuit fault diagnosis method based on a fractional order observer, and the method comprises the steps: constructing a fractional order circuit model based on the Kirchhoff's law, and describing a capacitor end voltage and an inductive current as a Caputo fractional order derivative form; a double-disturbance decoupling mechanism is designed, total disturbance is decomposed into a decoupling disturbance component and a non-decoupling disturbance component, physical isolation of the decoupling disturbance is achieved through a projection matrix, and the influence of the non-decoupling disturbance is eliminated through a dynamic suppression coefficient. Constructing a state observer to generate a state estimation error and a fault error vector, and dynamically compensating a fault estimation value in combination with an adaptive gain matrix; and ensuring the system stability through a Lyapunov function, and proving that an error state is converged to a preset boundary domain under the condition of satisfying a characteristic value correlation matrix inequality. Compared with the prior art, rapid and accurate diagnosis of faults such as inductance saturation and capacitance aging can be realized.

In the field of medical or healthcare equipment technology, we provide a combination type pie-shaped electronic heating device. [Solution] The number of combined pie-shaped electric heating devices is an odd number greater than 3, some of which are active pie-shaped electric heating units 6, and the other part is a passive pie-shaped electric heating unit 7. The pie-shaped electric heating unit includes a top cover, a bottom case, magnetic steel, an electronic heating temperature control PCB substrate, and associated epoxy filler. The top cover is fixedly connected to the bottom case and together forms the outer shell of the pie-shaped electric heating device, and the inside of the outer shell of the passive pie-shaped electric heating unit is filled only with high heat capacity filler. This invention divides the total number of pie-shaped electric heating devices into two types with different functions and uses the built-in magnetic steel to attract and stack them together, forming a compact whole. This significantly reduces the overall manufacturing cost of the system and potential circuit failure points, as well as effectively extending the effective heat supply duration of the entire device, improving the continuity of the user experience. Furthermore, it helps in the uniform transfer of heat within the combined device, avoiding localized overheating or underheating problems.