12results about How to "Improve electrical life" patented technology

The invention discloses a silver-based tin oxide electric contact material and a preparation method thereof, and relates to the technical field of electric contact materials. When the silver-based tin oxide electric contact material is prepared, firstly, a high-temperature solid-phase method is used for doping lithium and cerium to prepare doped tin oxide powder; stannic chloride and copper nitrate are prepared into a fiber membrane through electrostatic spinning, meanwhile, titanium dioxide is grown in situ through nano spraying, and doped stannic oxide fibers are prepared after calcination; the doped tin oxide powder, doped tin oxide fibers and silver powder are subjected to high-energy ball milling and powder mixing and then annealed, and silver-based tin oxide composite powder is obtained; the silver-based tin oxide composite powder is subjected to pre-pressing forming and then subjected to vacuum discharge plasma sintering, and the silver-based tin oxide electric contact material is prepared. The prepared silver-based tin oxide electric contact material has the advantages of being low in resistivity, high in fusion welding resistance, good in arc erosion resistance and easy to machine and shape.

The invention relates to the technical field of contact materials for high-voltage electrical equipment, and particularly discloses a contact material, a preparation method and a contact state monitoring method. The contact material includes a base material; the surface of the substrate material is combined with a porous HEAs framework, and the porous HEAs framework is provided with through holes perpendicular to the substrate material; the through holes are filled with phase change alloy, and the melting point of the phase change alloy is smaller than or equal to 200 DEG C. An integrated double-layer structure is adopted, a substrate material with excellent static electrical performance is combined with a porous HEAs framework-phase change alloy composite surface layer with dynamic response characteristics and self-adjusting performance, the contact material is endowed with the electric arc energy active dissipation, erosion self-inhibition and surface self-repairing capacity, and through doping modification of rare earth elements, the contact material can be subjected to surface self-repairing, so that the service life of the contact material is prolonged, and the service life of the contact material is prolonged. Consumption monitoring of the contact material in the working state is achieved, and the technical bottleneck that an existing contact material lacks active protection, self-adaptive repairing and state monitoring is solved.

The utility model discloses a direct current relay, comprising a contact system which comprises a movable contact piece and a static contact piece which are matched with each other, and the movable contact piece is contacted with or disconnected from the static contact piece under the driving of a magnetic circuit system of the direct current relay; the arc extinguishing magnetic assembly comprises a special-shaped permanent magnet, and at least one end of the special-shaped permanent magnet is bent towards one side, so that a magnetic field on the bent side forms a magnetic line gathering area; the contact system is configured to be located on the bent side of the special-shaped permanent magnet and arranged corresponding to the magnetic line gathering area of the special-shaped permanent magnet. When the special-shaped permanent magnet is used as a carrier of an arc extinguishing magnetic field, most of the magnetic field generated by the special-shaped permanent magnet is concentrated towards the middle, that is, magnetic lines of force on the arc-shaped inner surface of the special-shaped permanent magnet are high in concentration degree at the central position of a contact and can better correspond to the contact part, so that a good arc extinguishing effect is achieved; in other words, compared with a square permanent magnet, the arc-shaped block-shaped permanent magnet is more beneficial to achieving utilization maximization of an arc extinguishing magnetic field, the initial moving speed of the arc is increased, and the arcing time is shortened.

The application discloses an intelligent environment-friendly inflatable quick switch cabinet and a control method thereof, which comprises a gas tank and a vacuum circuit breaker pole arranged in the gas tank, and an insulation pull rod is arranged on the vacuum circuit breaker pole; the opening and closing of an arc extinguishing chamber contact is controlled through the insulation pull rod, so that the circuit is realized; a modular electromagnetic repulsion driving unit is mounted on the outer wall of the gas tank, and the modular electromagnetic repulsion driving unit is connected with the insulation pull rod through an output shaft penetrating through the gas tank; a capacitor group is connected with a coil, which is used for generating electromagnetic repulsion to push a repulsion disc after being electrified; the repulsion disc is rigidly connected with the output shaft, and is used for moving forward and backward under the action of the electromagnetic repulsion; the electromagnetic repulsion driving unit is isolated from the inside of the gas tank through the modular external hanging type setting, the physical breakpoint of the shell mounting interface blocks the conduction of high-frequency strain waves to the inside of the gas tank, the micro cracks of the insulation supporting part caused by mechanical impact in the environment-friendly gas environment are avoided, and the long-term insulation safety under the low dielectric strength is ensured.

The ground power supply system of the electric vehicle comprises a ground power supply module and a power collecting shoe. The ground power supply module is arranged between two steel rails and comprises a ground power supply positive module and a negative return contact rail. The power collecting shoe is arranged at the bottom of the electric vehicle and comprises a positive brush and a negative brush. The positive brush is in sliding contact with the ground power supply positive module, and the negative brush is in sliding contact with the negative return contact rail, so that the ground power supply module supplies power to the electric vehicle through the power collecting shoe. The negative return contact rail is grounded, so that the stray current generated when the power supply module returns to negative is limited in the ground power supply module, thereby avoiding the electric erosion damage of the stray current to the tie and the steel rail. The ground power supply system does not generate stray current to the outside through the negative module, and protects the railway facilities from being damaged.

The application relates to the technical field of circuit breakers, and discloses a small-sized DC circuit breaker which comprises a circuit breaker body, a static contact is arranged on the circuit breaker body, an operating mechanism is rotationally connected to the circuit breaker body, a dynamic contact is arranged on the operating mechanism, a first magnet and a second magnet are arranged on the circuit breaker body, the first magnet and the second magnet have the same magnetism, a first channel for separating the dynamic contact and the static contact is formed between the first magnet and the second magnet, and the first channel can repel an electric arc. The application can form a strong magnetic field region between the first magnet and the second magnet, a strong electric arc generated when the dynamic contact and the static contact are disconnected can be rapidly driven away from a contact gap, and the electric arc can be directionally stretched and cooled along the first channel, so that the electric arc can be effectively prevented from stagnating in the contact region, gathering energy and continuously burning, the degree of burning of a contact surface is reduced, the extinction efficiency of the electric arc is improved, and the breaking capacity, electrical life and working stability of the circuit breaker body are improved.

A clamping type contact system comprises a moving contact assembly and a static contact, the static contact is provided with a static contact main contact part and a static contact second breakdown part, and the moving contact assembly is provided with a moving contact assembly main contact part and a moving contact second breakdown part at positions corresponding to the static contact main contact part and the static contact second breakdown part. In the process that the moving contact assembly rotates to leave the static contact, the moving contact assembly main contact part and the static contact main contact part are separated first, and then along with rotation of the moving contact assembly, the distance between the moving contact assembly main contact part and the static contact main contact part becomes larger and larger. And the distance between the second breakdown part of the moving contact and the second breakdown part of the static contact becomes smaller and smaller. According to the moving contact system, the second breakdown points are arranged on the moving contact and the static contact, so that the electric arc is quickly led out from the main contact part, the ablation of the moving contact and the static contact is reduced, and the electrical service life of the switch is prolonged.

The invention belongs to the technical field of power supply management, and particularly provides an alternating current and direct current power supply isolated output switching device, which comprises a power supply input and preprocessing module used for accessing an alternating current main power supply and a direct current standby power supply and performing preprocessing protection on the two power supplies respectively; the power supply detection and control module is used for acquiring electrical parameters of the alternating-current main power supply and the direct-current standby power supply in real time, judging a power supply state of the power supply according to an acquisition result and outputting a control signal; the relay isolation switching module comprises two relays respectively corresponding to the main power supply branch and the standby power supply branch, and realizes physical isolation and automatic switching of the AC / DC power supply based on the control signal; the output adaptation and protection module is used for providing a corresponding output branch according to the load type and protecting an output power supply; wherein the two relays adopt an interlocking design to ensure that the two relays are not conducted at the same time.

The present invention discloses a three-state micro-rotation positioning mechanism, including a housing, a motor, a shaft cylinder, and a load bracket. The housing is a cylindrical barrel-shaped structure with an opening at the top, a through hole at the center of the bottom, fixing ears on the left and right sides, and a wire outlet hole on the front side. The motor is a rotary motor with a stator inside an outer rotor, fixed inside a closed space inside the housing, and the rotation axis of the rotor coincides with the light-transmitting axis. The shaft cylinder is a hollow cylindrical structure, which is a part of the motor rotor. Threaded holes are designed around the top, and there are two limiting protrusions at the bottom. The load bracket is a flange-shaped structure, and screw holes are arranged on the surrounding raised parts. The present invention has the characteristics of small size, light weight, low power consumption, and fast switching, and can achieve state switching with lower power consumption in a smaller space.

This invention discloses a rotary multi-contact isolating switch, comprising an operating part, a positioning part, a switching part, and a driving part. The operating part includes an upper housing, a handle, and a rotating shaft. The positioning part includes a positioning housing, a positioning gear, and a telescopic positioning assembly. The positioning gear is fixed to the bottom end of the rotating shaft, and the telescopic positioning assembly cooperates with the positioning gear to achieve position locking. The switching part includes a lower housing, a stationary contact, and a moving contact assembly, with the moving contact assembly slidably installed within the lower housing. The driving part includes a driven ring and a connecting shaft. The connecting shaft transmits the rotational motion of the rotating shaft to the driven ring, which drives the moving contact assembly to quickly disconnect from the stationary contact. This invention achieves accelerated disconnection of the moving and stationary contacts through the cooperation of the driven ring and the contact support block, effectively shortening the arcing time. The moving contact assembly adopts a double-spring structure, separating the contact pressure of the raised driven wheel from the contact pressure of the contact point, improving the contact stability and vibration resistance reliability during long-term operation. The overall structure is stable and highly reliable.

The present invention discloses a reciprocating transition circuit and voltage regulation method for an on-load tap changer, the circuit comprising: a first main through-current switch, a second main through-current switch, a first switch element, a second switch element, a third switch element, a fourth switch element, a first transition resistor and a second transition resistor; the second end of the first switch element, the first end of the second switch element and the first end of the first transition resistor are connected; the second end of the third switch element, the first end of the fourth switch element and the first end of the second transition resistor are connected; the second end of the first main through-current switch, the second end of the second switch element, the second end of the first transition resistor, the second end of the second main through-current switch, the second end of the fourth switch element and the second end of the second transition resistor are all used to connect to the neutral point lead-out terminal of the on-load tap changer. The present invention realizes on-load switching and voltage regulation entirely by switch elements and transition resistors; and no mechanical track-changing mechanism is required.

The invention relates to the technical field of power equipment detection, in particular to a controlled terminal full life cycle health state reconstruction method, which comprises the following steps: S1, designing a controlled terminal adaptive detection device controller; s2, designing and realizing a self-adaptive unit module; s3, designing a state monitoring and display system; s4, state monitoring and display implementation; and S5, operation and management in practical application. By designing and applying the self-adaptive detection device controller, accurate evaluation and efficient fault diagnosis of the health state of the controlled terminal (including the pole-mounted switch and the FTU feeder terminal) are achieved, the detection method refers to the non-power-failure detection principle, the adverse effect on the power supply reliability in the traditional detection process is avoided, and the detection accuracy is improved. And mechanical loss caused by multiple operation of the circuit breaker is reduced, so that the mechanical and electrical service lives of equipment are prolonged.