12results about How to "Improve overload capacity" patented technology

The invention relates to an integrated braking force sensor, which comprises a pressure sensing terminal, the pressure sensing terminal is of a spoke-like structure and comprises a terminal body, a mounting groove arranged in the terminal body, and a plurality of first bulges and avoiding notches arranged on the periphery of the terminal body, positioning holes are formed in the first bulges, and the positioning holes are communicated with the mounting groove; stress isolation grooves used for isolating stress are arranged between the plurality of first protrusions and the terminal body. The sensitive element is arranged on the pressure sensing terminal; the pressure sensing terminal is used for sensing an external pressure load signal and transmitting the external pressure load signal to the sensitive element; the sensitive element is used for converting the received pressure load signal into an electric signal and outputting the electric signal; and the printed circuit board is mounted in the mounting groove, is connected with the sensitive element and is used for processing the electric signal output by the sensitive element to obtain an output signal. The force sensor is easy to process, the production and manufacturing cost is reduced, the pressure sensing terminal adopting the spoke-imitating structure is excellent in performance and can be integrated on the calipers to serve as a structural part, and the internal space of the calipers is greatly saved.

The invention discloses an axial flux permanent magnet synchronous reluctance motor rotor based on modular harmonic counteracting, the rotor is designed in a three-in-one mode of structure modularization, magnetic barrier gradient and phase computable dislocation, a rotor assembly is formed by splicing N fan-shaped rotor modules along the circumference, and the adjacent modules are provided with optimal dislocation angles calculated according to the harmonic counteracting principle. The sum of target harmonic magnetic field vectors generated by each module is zero; a U-shaped magnetic barrier array of which geometric parameters are monotonically changed in a gradient manner is arranged in the fan-shaped rotor module, and a permanent magnet group is embedded in the fan-shaped rotor module; main electromagnetic harmonic waves are offset from the source, magnetism gathering and resistance increasing functions are decoupled, the mechanical robustness and the electromagnetic performance of the motor are improved, meanwhile, overall machining is converted into standardized module assembling, the manufacturing cost and the maintenance difficulty are reduced, different motor pole numbers can be flexibly adapted, and the service life of the motor is prolonged. The method is suitable for high-end application scenes such as new energy automobiles, industrial driving and aerospace.

The invention discloses an outdoor oil-immersed transformer convenient for heat dissipation, and relates to the technical field of transformers, the outdoor oil-immersed transformer comprises a box body and a transformer body fixedly mounted at an inner cavity of the box body, a rainproof cover is fixedly mounted at the top of the box body, and fans are fixedly mounted on two sides of the box body; heat dissipation mechanisms are installed on the two sides of an inner cavity of the box body, cooling mechanisms are installed on the heat dissipation mechanisms, a liquid limiting plate is fixedly connected between the heat dissipation mechanisms, and a floating guide pipe is fixedly installed on the top of the liquid limiting plate. According to the outdoor oil-immersed transformer facilitating heat dissipation, automatic opening and closing of an oil duct are achieved through thermal expansion of oil in the cooling mechanism, oil circulation heat dissipation can be completed without external electric drive, the heat dissipation mechanism is arranged in the inner cavity of the transformer box, air cooling is guaranteed, outdoor dust can be effectively prevented from entering the box to be accumulated, and the heat dissipation efficiency is improved. And dust accumulation and blockage of the cooling fins and the heat exchange pipe wall are avoided, heat resistance is increased, maintenance and cleaning frequency is reduced, and the device is suitable for outdoor severe dust raising environments.

This invention discloses a nano-silicon-based special transformer cooling oil and its preparation method. The cooling oil comprises the following components by mass percentage: 85%–90% modified silicone oil base oil, 2%–3% spherical nano-silicon particles, 1%–5% composite antioxidant, 0.5%–2% polyether-modified silicone oil dispersant and stabilizer, and the balance being functional additives. This invention constructs a three-dimensional thermally conductive network using surface-modified nano-silicon, synergistically combining composite antioxidants, low-temperature flow improvers, and anti-cavitation additives. This allows the cooling oil to maintain high insulation performance while achieving a thermal conductivity increase of ≥50%, good low-temperature fluidity at -80℃, partial discharge ≤5pC, cavitation inhibition rate ≥78%, overload capacity up to 200%, and service life extended to 40 years. This product is particularly suitable for extreme environments with altitudes ≥5000 meters and temperature differences ranging from -80℃ to +120℃, meeting the requirements of ultra-high voltage DC converter transformers and intelligent substations in cold regions for efficient heat dissipation and long-term stable operation.

The application discloses a universal pressure sensor, which comprises a pressure seat provided with a measuring hole at the bottom end, and a shell fixedly connected with the top edge of the pressure seat at the bottom end, wherein the top end of the pressure seat is provided with a limiting groove, the opening of the shell is downwardly arranged, the top end of the pressure seat and the inner wall of the shell enclose a cavity, the top end of the pressure seat is fixedly provided with a binding plate and a strain gauge, the binding plate is provided with mounting holes and limiting holes, the strain gauge is arranged in the mounting hole, a metal wire is arranged between the strain gauge and the binding plate, a compensation plate is arranged above the binding plate and fixedly connected with the binding plate through a support, the lower end of the support is provided with a limiting block and a containing cavity, the limiting block is inserted into the limiting groove through the limiting hole, the opening of the containing cavity is downwardly arranged to contain the strain gauge and the metal wire, and a plurality of vertical wires are fixedly connected with the compensation plate. The application improves the overload capacity and the sealing performance of the pressure sensor and expands the range of the pressure sensor.

The invention provides a rotor assembly of a self-starting permanent magnet auxiliary synchronous reluctance motor and a motor, the rotor assembly comprises a rotor iron core and permanent magnets, the rotor iron core comprises an outer layer filling groove, an inner layer filling groove, permanent magnet grooves, a shaft hole and a rotor excircle, the shaft hole is located at the central axis position of the rotor iron core, and the permanent magnet grooves are located in the outer layer filling groove. The permanent magnet grooves are located in the periphery of the shaft hole so that the permanent magnets can be arranged in the permanent magnet grooves, the inner-layer filling grooves are located between the permanent magnet grooves and the outer circle of the rotor, and the outer-layer filling grooves are located between the inner-layer filling grooves and the outer circle of the rotor. The permanent magnet grooves, the inner-layer filling grooves and the outer-layer filling grooves form a magnetic barrier layer in the radial direction of the rotor, and the inner-layer filling grooves and the outer-layer filling grooves are filled with conductive conductors. According to the self-starting permanent magnet auxiliary synchronous reluctance motor, the problem of low starting torque of the self-starting permanent magnet auxiliary synchronous reluctance motor in the prior art can be solved.

The application discloses a variable magnetic guide stator structure and an axial flux permanent magnet motor, and the variable magnetic guide stator structure comprises a stator yoke part, a stator tooth part, a stator tooth shoe and a stator winding, the stator yoke part is provided with wedge-shaped grooves distributed in a ring shape, the stator tooth part is radially assembled to the stator yoke part through matched wedge-shaped bosses, the stator tooth part is provided with triangular grooves on both sides, the stator tooth shoe is embedded between adjacent stator tooth parts through parallelogram bosses, and the three are radially embedded to form a modular stator structure, the stator iron loss is reduced through modular assembly and differential material matching, the air gap magnetic field is actively regulated and controlled by relying on the variable magnetic guide tooth shoe, torque pulsation is effectively inhibited, axial magnetic pulling forces can be offset by the symmetrical layout of the double stator, the double stator has the characteristics of high torque density and wide power domain efficient operation, and is suitable for new energy automobile, wind power and other scenes.

The application belongs to the technical field of power electronic intelligent control, and provides a network type converter overload capacity improvement method and system based on DPWM, which comprises the following steps: obtaining a converter d / q axis current instruction and synthesizing a current instruction included angle, constructing a data set of the current instruction included angle, a clamping offset angle and a junction temperature, and establishing a direct nonlinear mapping of the current instruction included angle to the optimal clamping offset angle through an artificial neural network model; under an overload condition, the real-time current instruction included angle is used to quickly output the optimal clamping offset angle from the model; the optimal clamping offset angle is injected into an electric angle for sector selection, combined results are used to generate a zero sequence component injection voltage instruction, and a clamping mode is dynamically switched to align the clamping interval with a current peak value area, so that the insulated gate bipolar transistor peak value section zero switching action is realized to suppress the junction temperature. The application simplifies calculation, improves response speed, accurately suppresses the junction temperature, and significantly improves the converter overload capacity.

The invention discloses an aircraft tire pressure sensor, relates to the technical field of aircraft tire pressure monitoring, and can realize accurate monitoring of aircraft tire pressure under extreme working conditions. The sensor comprises a pressure sensor probe and a pressure regulator electrically connected with the pressure sensor probe; the pressure sensor probe comprises a temperature sensitive element and a pressure sensitive element, and the pressure sensitive element comprises a metal elastic membrane and a pressure detection circuit deposited on the metal elastic membrane by adopting a sputtering thin film process; the pressure sensor probe is used for detecting the tire pressure and the tire temperature and transmitting a detected pressure signal and a detected temperature signal to the pressure regulator; and the pressure regulator is used for performing signal modulation and error compensation processing on the pressure signal and the temperature signal to obtain a current signal for detecting pressure, and transmitting the current signal to the tire pressure monitoring system.

This invention discloses a method, device, electronic equipment, and medium for improving the overload capacity of a grid-connected converter, addressing the technical problem that current related technologies have poor versatility and limited overload capacity improvement, making it difficult to meet the requirements for safe system operation. The method includes: acquiring three-phase current signals from the grid-connected converter and the grid connection point within the current control cycle; if the grid-connected converter is determined to be in an overload operating state based on the three-phase current signals, obtaining the optimal DC voltage value from a preset DC voltage level table based on the current overload level; and sending the optimal DC voltage value to the grid-connected converter so that the grid-connected converter control switches the current DC bus voltage value at the grid connection point to the optimal DC voltage value.

This application discloses a method and system for optimizing the failure and damage of turbine thrust bearings based on lubrication and load-bearing characteristic analysis, relating to the field of mechanical lubrication. The method includes: establishing a thermo-fluid-structure interaction finite element model; deriving the actual axial load borne by the bearing by measuring the center displacement of the elastic gasket during operation; substituting the actual load into the model and performing lubrication and load-bearing characteristic analysis under typical operating conditions to determine the dominant factors of lubrication degradation; conducting parametric simulations of axial load and lubricating oil inlet temperature based on the dominant factors, summarizing the degradation law of increased load and temperature, and formulating optimization strategies to suppress the failure of turbine thrust bearings. This application improves the targeting and efficiency of turbine thrust bearing failure and damage optimization, and enhances the bearing's overload resistance.

The utility model relates to the technical field of force sensors, in particular to a compact nonlinear six-dimensional force sensor. In order to solve the problems that the overload capacity of a traditional cantilever beam structure is insufficient, a novel I-shaped beam and II-shaped beam structure is difficult to miniaturize and the requirements of a humanoid robot for high overload capacity and a compact structure cannot be met at the same time, the following technical scheme is provided: the six-dimensional force sensor comprises an outer frame; the cross beam is mounted in the outer frame; the vertical beam is vertically arranged at the central position of the cross beam; the connecting block is arranged at one end, far away from the cross-shaped beam, of the vertical beam; the outer frame, the cross-shaped beam, the vertical beam and the connecting block are integrally designed; and the mounting plate is mounted on the connecting block. According to the utility model, the mounting requirements of humanoid robot joints and other space-limited scenes can be met, the multi-time rated load impact can be borne, and the movement safety and the complex task execution capability of the robot are improved.