6 results about "Coil tap" patented technology

The invention relates to the technical field of transformers, and discloses an energy-saving dry-type transformer which comprises a transformer body, the transformer body is provided with a high-voltage winding, the high-voltage winding is provided with two blocking hole sets, and each blocking hole set comprises three blocking holes which are arranged on the circumferential face of the high-voltage winding in a regular triangle shape. The two groups of gear hole groups jointly define five voltage regulating gears, the distance between every two adjacent gear holes is consistent, during operation, only an input shaft of the transfer case needs to be rotated, the two conductive columns can be driven by the linkage piece to be synchronously and accurately inserted into or withdrawn from the corresponding gear holes, and electrical connection with a high-voltage winding coil tap is completed. According to the structure, a traditional bolt connection mode is abandoned, the operation process is remarkably simplified, time and labor are saved, the rapid gear shifting requirement in the test process is particularly met, and the test efficiency and the production progress are effectively improved.

The utility model discloses a network transformer coil tap shaping mechanism, and belongs to the field of shaping mechanisms. A network transformer coil tap shaping mechanism comprises a rack and a positioning frame detachably installed on the rack, and further comprises an installation rod fixedly installed on the rack, a fixing piece used for positioning a coil is arranged on the installation rod, and a linkage piece used for fixing a tap is arranged on the installation rod; according to the utility model, through the arrangement of the fixing piece, the coil can be fixed, and meanwhile, in the process that the coil is fixed by the fixing piece, the linkage piece moves along with the piston rod in the fixing piece, and the tap close to one side of the coil can be fixed, so that the tap is prevented from falling off from the coil due to overlarge force in the process of stranding the tap, and the quality of shaping and processing the tap is improved.

The application relates to the technical field of transformers, and discloses an energy-saving dry-type transformer which comprises a transformer body, the transformer body is provided with a high-voltage winding, two groups of blocking hole groups are arranged on the high-voltage winding, each group of blocking hole groups comprises three blocking holes arranged in a regular triangle on the circumferential surface of the high-voltage winding, the two groups of blocking hole groups jointly define five voltage regulating blocking positions, the spacing between two adjacent blocking holes is consistent, and the energy-saving dry-type transformer further comprises a regulating unit; during operation, only the input shaft of a distributor needs to be rotated, two conductive columns can be synchronously and accurately inserted into or withdrawn from corresponding blocking holes through linkage members, and the electrical connection with the high-voltage winding coil tap is completed. The structure discards the traditional bolt connection mode, significantly simplifies the operation process, saves time and effort, is especially suitable for the quick regulating demand in the test process, and effectively improves the test efficiency and production progress.

The present application relates to the technical field of power grid fault diagnosis, and particularly relates to a method and system for diagnosing single-phase grounding fault of arc suppression coil distribution network. The method comprises the following steps: collecting bus zero sequence voltage and arc suppression coil bias current, and combining threshold value to determine whether single-phase grounding fault occurs; after the fault occurs, suspected grounding line is verified and positioned by segmenting and isolating according to the change amplitude of each bus zero sequence voltage, and the grounding point and fault point position are further accurately determined by zero sequence voltage and zero sequence current change; finally, the arc suppression coil tap is adjusted according to the fault point position, the best compensation position is selected and verified by adjusting the number of turns, so that the single-phase grounding fault is quickly diagnosed and compensated. Through multi-stage zero sequence voltage / current analysis, topological segmenting and isolating verification, time sequence curve comparison judgment and tap intelligent adjustment and compensation, the present application realizes accurate positioning and efficient arc suppression compensation of single-phase grounding fault, and improves the diagnosis accuracy and the operation reliability of distribution network.

The utility model relates to the technical field of underground coal mine equipment, in particular to a permanent magnet synchronous variable-frequency coal mining machine roller, which is characterized in that a coal mining machine body is rotatably connected with one end of a rocker arm through a rotating shaft, the other end of the rocker arm is fixedly connected with one end of a stator, the other end of the stator is provided with a stator slot, a pole coil is wound on the stator, and a rotor is semi-open; one end face is in an open state, the other end face is in a semi-closed state, a rotor groove is formed in the center of the end face in the semi-closed state, the rotor is buckled on the outer side of the stator, the inner surface of the rotor can rotate around the outer surface of the stator through rotating connection of the stator groove and the rotor groove, and the pole coils are connected with a frequency conversion system through coil taps.

The utility model relates to a connection change device for transformer. A connection change device for transformer comprises: a plurality of connection points, each connection point is connected with different coil tap in a plurality of coil taps of the high voltage side winding of transformer;A plurality of voltage equalizing balls, each voltage equalizing ball is configured to accommodate one of a plurality of connection nodes and is electrically connected with the corresponding connection point, so that the electric field around the corresponding connection point is homogenized;One or more connecting lines, each connecting line is configured to connect two connection points in a plurality of connection points via a corresponding voltage equalizing ball in a plurality of voltage equalizing balls, wherein the voltage that can be borne on the high voltage side winding of transformer is changed by changing the connection mode of one or more connecting lines and a plurality of connection points;And insulating oil is configured to immerse each connecting line and a plurality of voltage equalizing balls to insulate each connecting line and a plurality of voltage equalizing balls. Thus, the cost of connection change of transformer is significantly reduced.