10 results about "Coil tap" patented technology

According to the inductance adjusting system of the ultrasonic generator frequency self-adaption system, a main execution component is an inductor, and the inductor comprises a magnetic core coil. The magnetic core coil is provided with a group of coil leading-out eight taps and two magnetic cores which are at least partially inserted into the magnetic core coil in advance, the two magnetic cores are symmetrically arranged, a first substrate and an adjusting plate are respectively fixed on the two magnetic cores, a second substrate is arranged beside the adjusting plate, and the first substrate and the second substrate are fixed on the adjusting plate. An electric adjuster for driving the magnetic core on the adjusting plate to move is mounted on the second substrate, and a driving part of the electric adjuster is connected with the adjusting plate. On one hand, a rotating motor is electrified to drive a rotating screw rod to rotate, so that the rotating screw rod is matched with a threaded hole to enable a magnetic core on an adjusting plate to perform lifting displacement, and then a gap between a pair of magnetic cores is adjusted, or a motor of an electric linear push rod or a linear motor is electrified to drive the magnetic core on the adjusting plate to perform lifting displacement; therefore, the gap between the pair of magnetic cores is adjusted, and the inductance value of the inductor is adjusted. On the other hand, the single-chip microcomputer minimum system module switches eight groups of taps of the magnetic core coil through the coil tap gating module, and inductance value adjustment of the inductor is achieved by changing the number of turns of the inductance coil.

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 present invention relates to a self-resonant inductance pressure measurement test device with a capacitive reactance fusion structure, which includes a support base, an insulating support cylinder, and multiple capacitive reactance fusion units arranged end to end in the vertical direction. Each capacitive reactance fusion unit includes an external support cylinder, a capacitor bank and a coil disposed inside the external support cylinder. The coil is located at the center of the external support cylinder, and the capacitor bank is arranged around the outside of the coil, between the coil and the external support cylinder. Multiple capacitors are connected by internal connection lines. Coil taps are led out from both the upper and lower ends of the coil, and capacitor taps are led out from both the upper and lower ends of the capacitor bank. Among them, two coil taps are led out from the lower end of the coil of the lowermost capacitive reactance fusion unit. The insulating support cylinder is fixed on the support base, and the lowermost capacitive reactance fusion unit is fixed on the insulating support cylinder. Compared with the prior art, the present invention has the advantages of small occupied site and can detect the equipment status, etc.

The invention relates to a connection change device and method for a transformer. A connection changing apparatus for a transformer includes: a plurality of connection points, each connection point being connected to a different coil tap of a plurality of coil taps of a high voltage side winding of the transformer; a plurality of voltage-sharing balls, each voltage-sharing ball being configured to accommodate one of the plurality of connection nodes and to be electrically connected to the corresponding connection point so as to homogenize an electric field around the corresponding connection point; each connecting line is configured to be connected with two connecting points in the multiple connecting points through the corresponding voltage-sharing ball in the multiple voltage-sharing balls, and the voltage capable of being borne by the high-voltage side winding of the transformer is changed by changing the connecting mode of the more than one connecting line and the multiple connecting points; and the insulating oil is configured to immerse each connecting line and the plurality of voltage-sharing balls so as to carry out insulating packaging on each connecting line and the plurality of voltage-sharing balls. The cost of the connection change of the transformer is thus significantly reduced.

The invention discloses an intelligent calculation method and system for arc suppression coil compensation of a 66-kilovolt system, and the method comprises the steps: naming a 66-kilovolt transformer substation provided with an arc suppression coil according to an actual operation wiring diagram of a power grid; a 66KV bus named as 66KV substation sti is named as # imgabs0 #, a line named as # imgabs1 # of the 66KV substation sti is named as # imgabs2 #, a line named as # imgabs3 # of the 66KV substation sti is named as # imgabs2 #, a line named as # imgabs3 # of an m-type arc suppression coil is named as # imgabs4 #, and a line # imgabs5 # capacitance current calculation model is established; a bus # imgabs6 # capacitor current total model is established; establishing an arc suppression coil # imgabs7 # tap gear information model and an inductive current compensation calculation model; and substituting the line # imgabs8 # capacitance current calculation model, the bus # imgabs9 # capacitance current total calculation model, the arc suppression coil # imgabs10 # tap gear information model and the inductive current compensation calculation model into the system compensation degree calculation model to obtain a compensation degree result of the 66-kilovolt system. According to the invention, tuning data calculation can be realized automatically, quickly and adaptively, and a sufficient basis is provided for regulation and control personnel to dispose arc suppression coil gears.

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.