113results about How to "Reduce insulation distance" patented technology

An ignition coil for an internal combustion engine, including a magnetically active core, a first coil shell which is used as a support for a first coil winding made of an electrically conductive wire, and a second coil shell which is positioned so as to be concentric to the first coil shell and is used as a support for a second coil winding made of an electrically conductive wire. Situated between the first coil winding and the second coil winding is a shielding layer, which is made of an electrically conductive material and provided with a grounding contact.

This hybrid drive device separates the lubricant supplied to a clutch and to an electric motor and improves lubrication and cooling of the clutch and electric motor. Lubricant from a clutch lubrication hole (143) and an electric motor lubrication hole (145) and consisting of shaft core lubrication is partitioned by a rotor support member (126). The lubricant which lubricates the clutch (6) and flows out is separated by the cover member (187) and does not flow into the coil end (24a) on one side. The electric motor lubricant is guided to the coil end (24b) on the other side, and, passing through an oil passage (186), is guided to the coil end (24a) on the first side.

A mining explosion-proof all-insulation dry type transformer with an amorphous alloy iron core for a mobile transformer substation comprises an integral winding, the iron core, an upper clamp, a lower clamp and a shell, wherein the integral winding includes low-voltage coils and high-voltage coils. The mining explosion-proof all-insulation dry type transformer is characterized in that insulation layers are arranged among layers of the low-voltage coils, the high-voltage coils are arranged on the outer layer of the low-voltage coils, each insulation layer is arranged between each two adjacent layers of the high-voltage coils, an outer insulation layer covers the high-voltage coil, and the integral winding has the square section. The iron core is the amorphous alloy iron core, and an assembling lap joint of the iron core is arranged on the lower portion. The upper clamp and the lower clamp are non-metallic parts cast by epoxy resin and reinforced by filled glass fibers, the U-shaped sections of the upper clamp and the lower clamp cap the upper yoke and the lower yoke to press the upper end face and the lower end face of the winding and are fastened by pull bolts, and the pull bolts are symmetrically mounted on the low-voltage side and the high-voltage side to fasten the upper clamp and the lower clamp. The mining explosion-proof all-insulation dry type transformer has the advantages of long service life, low loss, low noise, no maintenance or pollution, high reliability, flame retardance, fire resistance, recyclability after being used up and the like.

A high voltage electric device attached to a cooling unit includes heating components, an electric circuit board, a case, and an insulating member. The heating components are used at high voltage and are different in size. The heating components are fixed via lead wires respectively to the electric circuit board. The case accommodates the heating components and the electric circuit board. The insulating member seals the heating components and the electric circuit board in the case. An outermost peripheral surface of the insulating member on the cooling unit-side cooled by refrigerant is referred to as a reference surface. Respective shortest distances from the reference surface to the heating components are the same as each other. An electric compressor includes the high voltage electric device, an electric motor that is operated by electric power supplied by the high voltage electric device, and a compression mechanism that is driven by the electric motor and is applied to a refrigeration cycle. The cooling unit is cooled by the refrigerant drawn into the compression mechanism.

The invention discloses a smart power grid junction station, which comprises a mobile radio unit (MRU) smart junction station measurement and control unit, an automatic sulfur hexafluoride (SF6) load switch, a smart T type plug connector, a wireless transmission module, a video monitoring all-in-one machine, a monitoring camera and a distributed direct current power supply, wherein the automatic SF6 load switch is in circuit connection with the MRU smart junction station measurement and control unit; the smart T type plug connector is connected with the automatic SF6 load switch; the wireless transmission module is in circuit connection with the MRU smart junction station measurement and control unit; the video monitoring all-in-one machine is in circuit connection with the wireless transmission module; and the output end of the monitoring camera is in circuit connection with the video monitoring all-in-one machine. The automatic SF6 load switch monitored by the MRU smart junction station measurement and control unit is adopted, a control instruction is transmitted to the automatic SF6 load switch to turn off or turn on branch cables, and influence on the running of a primary grid in regional overhauling is avoided; cost is saved, switch positions are saved for power transformer substations, the construction of the power transformer substations is reduced, additional nodes are conveniently arranged for the product, and the product is high in extensibility; and the MRU smart junction station measurement and control unit can be replaced by a feeder terminal unit or a distribution terminal unit.

The invention discloses an insulating equalizing ball for a super-high voltage or ultra-high voltage transformer and a method for manufacturing the insulating equalizing ball. The insulating equalizing ball comprises an equalizing ball, a pure insulation paper covering shell, pure insulation paper braces and a pure insulation paper cylinder body; the equalizing ball is provided with a hollow metal ball body and an annular flange plate; the pure insulation paper covering shell is tightly covered on the outer wall of the metal ball body, and the pure insulation paper cylinder body is sleeved outside the pure insulation paper covering shell; each pure insulation paper brace is arranged between the pure insulation paper covering shell and the pure insulation paper cylinder body; the inward end surface of each pure insulation paper brace is fixed with the pure insulation paper covering shell in a bonding way, and the outward end surface of the each pure insulation paper brace is fixed with the pure insulation paper cylinder body in a bonding way. The insulating equalizing ball increases the insulation used field strength of the transformers, shortens the insulation distance of the bushing outgoing line of the transformers, eliminates the hidden trouble of the partial discharge generated by the transformer product, improves the operation reliability of the transformer and prolongs the working life of the transformers.

In a stator of a linear motor having a plurality of outer core blocks, each of the outer core blocks comprises first and second side core blocks and a center core block. The center core block has an inner diameter equal to an outer diameter of a coil block. Consequently, insulation and heat transfer efficiencies are improved, and the size of the linear motor is minimized. Furthermore, the center core block is provided with a heat sink part, which is inserted in a coil block for dissipating heat from the coil block. Consequently, heat generated from the coil block is effectively dissipated.

The invention relates to a high-voltage terminal device for a transformer, which is arranged at a high-voltage terminal of the transformer and is provided with a shielding ball and an outgoing line cylinder in insert connection with the shielding ball. The external surface of the shielding ball is wrapped by heat-resistance insulated paper, an insulated layer in an internal cavity is an extended part of the heat-resistance insulated paper, and an air pocket position of the part is poured with epoxy resin. The outgoing line cylinder is sequentially provided with a shielding tube, an insulated layer and a paper cylinder from the inside to the outside, wherein the paper cylinder has a plurality of layers; supporting bars are arranged between layers; and the insulated layer is insulated paperwrapped outside the shielding tube. The whole terminal device of the invention is greatly improved in working voltage due to uniform electric field distribution and reduces local discharge quantity bysolving the gas pocket problem in the internal cavity of the shielding ball. In addition, under a condition of the same insulation level, the insulation distance between electrodes is reduced.

The invention relates to an electrically erasable, non-volatile memory device, having a memory cell of the floating gate type (16), defined by a source zone, a drain zone, a channel zone (8) and a control gate zone (6), the latter being separated from the channel zone by an insulation zone (14), said five zones being implemented in a semiconductor film formed on an insulating layer (4), said memory cell being laterally insulated by one or more insulation zones (10, 12) in contact with the insulating layer.

A device for connecting two electrical lines to essentially tubular connecting elements (1, 2) of drill pipes (32), which elements can be screwed to one another, characterized in that on one connecting element (1), a first electrical contact element (10) is located to be able to move in the direction of rotation of the connecting element (1), and that on the other connecting element (2), a second electrical contact element (23) is located in a fixed manner.

Disclosed is a wiring board which comprises: conducting plates (21, 22, 121, 122, 131, 132, 141, 142, 151, 152, 161, 162, 171, 172, 181, 182, 191, 192, 201, 202, 211, 212, 221, 222, 231, 232) including electrode parts (21a, 22a, 139b, 139c, 139d) which are connected to semiconductor elements (11, 311, 312) for power conversion, and wiring parts (21b, 22b, 131b, 132b, 139a); liquid cooling pipes (31, 32) which are disposed in the region of the conducting plates and are supplied with a liquid (33) for internal cooling; and an insulating resin material (51) which is disposed at least between the conducting plates and the liquid cooling pipes.

A magnetron for microwave ovens including a second insulator interposed between a connection part and a bottom of a yoke to form a relatively lengthened insulation distance, or a molded insulating plate attached to a bottom of the filter box to reduce a distance between the connection part and a bottom of the filter box. In the magnetron, an entire height of the magnetron is reduced, so that a miniaturization of the magnetron can be implemented and a design of a product including the magnetron, such as a microwave oven, can be freely carried out, thus allowing an appearance of the product to be variously designed.

The invention relates to a circuit breaker for improving insulating property while being capable of reducing the diameter of a metal container of the circuit breaker. The following components are arranged in the sealed container isolated by insulating clapboard of central conductor and filled with insulting gas: a fixed side conductor installed on the central conductor of insulating clapboard of one side; a fixed side contact element connected with the fixed side conductor; an electric arc contact terminal installed on the inner side of the fixed side contact element; a fixed side shielding hood allocated to surround the fixed side contact element; a movable element in contact with the fixed side contact element and the electric arc contact terminal and firstly cut off from the fixed side contact element before being turned off with the electric arc contact terminal; a spring driving the electric arc contact terminal to move along the axial direction if the movable element is cut off; and a following device of supporting framework; besides, a serially connected inductor provided with coil part or magnet is inserted between an electric arc extinguishing part of the electric arc contact terminal and the fixed side conductor.

The invention discloses a high-voltage frequency converter with serially connected power units, which is composed of a rectifying transformer at electric network, 3*N power units, and a control system. The rectifying transformer is provided with 3*N secondary windings, which each secondary winding is connected with the input of one power unit. The maximum output voltage of each power unit is V. The invention is characterized in that the secondary windings of the rectifying transformer are divided into three groups, while each group has N windings, as Wa1 to WaN, Wb1 to WbN, and Wc1 to WcN, which are arranged sequentially. The connection sequence between one group of secondary windings and the power units is reverse to the connection sequence between other two groups with the power units. The three secondary windings connected with the power units A1, B1, and C1 have two ones nearby. Two insulation voltages between two nearby secondary winding groups have one not smaller than V and one not smaller than N*V.

The invention belongs to the field of high-voltage electric device sets and in particular relates to a high-voltage switch cabinet. The high-voltage switch cabinet comprises a cabinet shell, a bus room, a circuit breaker handcart room, a cable room and a relay meter cabinet, wherein the bus room is provided with a bus, a bus sleeve covers the bus, the circuit breaker handcart room is provided with a circuit breaker handcart, an arrester, a cable and a grounding switch are arranged in the cable room, and a current transformer is arranged on the back wall of the cable room. The high-voltage switch cabinet disclosed by the invention has the advantages that the bus sleeve covers the bus so that the insulation distance between buses and the insulation distance between each bus and the cabinet shell are reduced, and the size of the high-voltage switch cabinet is shortened; a cable room cabinet door is changed from a traditional clapboard type into a rotary shaft type, so that the cable room cabinet door can be conveniently opened and the cable room can be conveniently overhauled; and in addition, the safety performance of the high-voltage switch cabinet is increased through components, such as a voltage leaking device and the arrester.

Three-phase TSCs are delta-connected to three-phase AC buses. Each TSC includes a reactor, a capacitor, and a thyristor switch that are electrically connected in series. The thyristor switches of the three phases are arranged so that the terminal-to-terminal distance between respective thyristor switches of respective phases are not uniform. The three-phase TSCs are configured so that the TSCs of two of the three phases having a shortest terminal-to-terminal distance therebetween are opposite to each other in terms of connection order in which the thyristor switch and the capacitor are electrically connected along a loop path made up of the delta-connected TSCs.

The invention relates to an electrically erasable, non-volatile memory device, having a memory cell of the floating gate type (16), defined by a source zone, a drain zone, a channel zone (8) and a control gate zone (6), the latter being separated from the channel zone by an insulation zone (14), said five zones being implemented in a semiconductor film formed on an insulating layer (4), said memory cell being laterally insulated by one or more insulation zones (10, 12) in contact with the insulating layer.

The invention discloses a double-split epoxy resin insulation dry type boosting transformer for wind power and photovoltaic power generation, and belongs to the field of transformers. Each of three phases of windings comprises two groups of high-voltage coils and two groups of low-voltage coils, wherein the two groups of high-voltage coils are arranged vertically on the same axis, the winding direction of each upper high-voltage coil is opposite to the winding direction of each lower high-voltage coil, the adjacent ends of the two groups of high-voltage coils in one winding are connected in an equipotential way, the three groups of high-voltage coils at the upper part are connected in a Y shape, the three groups of high-voltage coils at the lower part are also connected in a Y shape, the two groups of low-voltage coils in each winding are also arranged vertically on the same axis, the low-voltage coils are coaxially arranged in the inner sides of the high-voltage coils, the three groups of low-voltage coils at the upper part are connected in a triangle way, and the three groups of low-voltage coils at the lower part are also connected in a triangle way. The transformer has the advantages that the short-circuiting current is small, the two paths of input power sources can be simultaneously and independently connected, and the running of a power grid is safe. The transformer is applied to the wind power and photovoltaic power generation systems.

The invention discloses an insulating equalizing pipe for a super-high voltage or ultra-high voltage transformer and a method for manufacturing the insulating equalizing pipe. The insulating equalizing pipe comprises an equalizing pipe, a pure insulation paper covering shell, pure insulation paper inner ring braces, a pure insulation paper inner cylinder body, pure insulation paper outer ring braces and a pure insulation paper outer cylinder body; the pure insulation paper covering shell is tightly covered on the outer wall of the equalizing pipe, and the pure insulation paper inner cylinder body is sleeved outside the pure insulation paper covering shell; and the pure insulation paper outer cylinder body is sleeved outside the pure insulation paper inner cylinder body. The insulating equalizing pipe greatly increases the insulation used field strength of the transformers, shortens the insulation distance of the bushing outgoing line of the transformers, eliminates the hidden trouble of the partial discharge generated by the transformer product, improves the operation reliability of the transformer, prolongs the working life of the transformer, and fills a domestic gap in the production of insulating equalizing pipes simultaneously.

The invention discloses a double-ring on-load tap changer with the ultrahigh impedance of 110 kV, comprising an iron core, a low-voltage coil, a high-voltage tap coil and a high-voltage coil. The low-voltage coil, the high-voltage tap coil and the high-voltage coil are sequentially arranged outside the iron core, and the high-voltage coil adopts middle wiring. The invention realizes the performance of ultrahigh impedance and low loss at a lower cost.

The invention discloses an outdoor dry-type transformer which comprises a high-voltage coil, a low-voltage coil, an iron core, gap walls and an outer wall. Resin is cast to the space between the high-voltage coil and low-voltage coil and the space between a coil and the iron core to form the gap walls, the gap space is filled with the gap walls, resin is cast to form the outer wall wrapping the high-voltage coil, the low-voltage coil and the iron core, the three coils are connected into a whole by the outer wall, and the iron core is a closed three-dimensional wound core. Insulation between the high-voltage coil and the low-voltage coil and insulation between the low-voltage coil and the iron core are all solid insulation of the resin. As the dielectric constant of the resin is far larger than that of air, insulation distance can be greatly shortened, namely, the distance between the high-voltage coil and the low-voltage coil can be shortened, and the overall dimensions of the transformer coils are decreased. The high-voltage coil, the low-voltage coil and the iron core are cast together, deformation of the coils can be prevented, the short circuit resistance of the transformer is enhanced, the influence of external wind, sun and rain can be resisted, severe environments can be resisted, and the outdoor dry-type transformer can be used as an outdoor transformer.

A mining explosion-proof all-insulation dry type transformer with an amorphous alloy iron core for a mobile transformer substation comprises an integral winding, the iron core, an upper clamp, a lower clamp and a shell, wherein the integral winding includes low-voltage coils and high-voltage coils. The mining explosion-proof all-insulation dry type transformer is characterized in that insulation layers are arranged among layers of the low-voltage coils, the high-voltage coils are arranged on the outer layer of the low-voltage coils, each insulation layer is arranged between each two adjacent layers of the high-voltage coils, an outer insulation layer covers the high-voltage coil, and the integral winding has the square section. The iron core is the amorphous alloy iron core, and an assembling lap joint of the iron core is arranged on the lower portion. The upper clamp and the lower clamp are non-metallic parts cast by epoxy resin and reinforced by filled glass fibers, the U-shaped sections of the upper clamp and the lower clamp cap the upper yoke and the lower yoke to press the upper end face and the lower end face of the winding and are fastened by pull bolts, and the pull bolts are symmetrically mounted on the low-voltage side and the high-voltage side to fasten the upper clamp and the lower clamp. The mining explosion-proof all-insulation dry type transformer has the advantages of long service life, low loss, low noise, no maintenance or pollution, high reliability, flame retardance, fire resistance, recyclability after being used up and the like.

The invention discloses an impact voltage generating device. The impact voltage generating device comprises a host computer, a body, a DC high voltage power source and an impact generation loop, wherein the DC high voltage power source comprises a transformer, a silicon stack and an output end, and the host computer is fixed in the body. The impact voltage generating device is characterized in that the DC high voltage power source employs the closed structure, the transformer and the silicon stack are fixed in the body, the DC voltage is transmitted by the output end to the impact generation loop, the impact generation loop is a modular structure composed of multi-level modules, and the modules in each level are fixed and connected in series through supporting insulators and fixing supports. The impact voltage generating device is advantaged in that the transmission overvoltage in the high voltage environment can be enhanced, and safety performance can be improved.

The invention discloses a high-voltage and direct-current quick disconnecting switch. The high-voltage and direct-current quick disconnecting switch comprises a sealing tank body, a high-voltage electrode and a low-voltage electrode. Two disc insulators, four moving contacts, four static contacts, four conductive button contacts, five insulating supports, three conducting rods, four operating mechanisms, four keeping units and four buffering units are arranged in the sealing tank body. The moving contacts are driven by the operating mechanisms to make contact with or to be separated from the static contacts. When the moving contacts make contact with the static contacts, the three conducting rods are connected in series so that an electrically-conductive path can be formed between the high-voltage electrode and the low-voltage electrode. When the moving contacts are separated from the static contacts, multiple fractures are formed between the three conducting rods to bear the high voltage between the high-voltage electrode and the low-voltage electrode. The high-voltage and direct-current quick disconnecting switch has the advantages that all the components are arranged in the tank body, the lengths of insulating pull rods are reduced, and therefore loads of the operating mechanisms are reduced, and multi-fracture synchronous rapid separating and combining can be achieved on the premise of the permitted mechanical strength. The high-voltage and direct-current quick disconnecting switch can be applied to 200kV high-voltage situations.

An ignition coil for an internal combustion engine, including a magnetically active core, a first coil shell which is used as a support for a first coil winding made of an electrically conductive wire, and a second coil shell which is positioned so as to be concentric to the first coil shell and is used as a support for a second coil winding made of an electrically conductive wire. Situated between the first coil winding and the second coil winding is a shielding layer, which is made of an electrically conductive material and provided with a grounding contact.

The invention relates to an epoxy resin pouring shielding cylinder of a transformer, belonging to the technical field of dry type transformers. The epoxy resin pouring shielding cylinder of the transformer is characterized by adopting a structure in the shape of a pouring shielding cylinder; and grounded shields inside the shielding cylinder are a plurality of open type metal straps in winding structures. The invention has the advantages of simple structure, reliable property, high insulating withstand voltage, reduced eddy-current loss, good heat-radiating effect, convenience in operation and assembly, manufacturing cost saving, reliable grounded shielding, safety operation of the transformer, and the like.

A solid insulated bus switchgear, comprising: a cabinet having unit rooms defined by a ground metal plate on a front side thereof and a bus room defined by a ground metal plate on a rear side thereof; a first switching unit and a second switching unit, each of which has a circuit breaker, a current transformer, a zero-phase sequence current transformer, and an instrument voltage transformer, the first switching unit and the second switching unit being vertically stacked in the cabinet; main buses, which are solid-insulated, placed in the bus room in the cabinet in the width direction of the cabinet; a communication bus, which is solid-insulated, linked to the main buses, and connected to one end of the first switching unit at one end and to one end of the second switching unit at another end; and a first leader bus and a second leader bus, which are solid-insulated, the first leader bus being connected to another end of the first switching unit, the second leader bus being connected to another end of the second switching unit; wherein each of the first switching unit and the second switching unit has a movable cart, the circuit breaker mounted on the cart, and a frame assembly, to which the current transformer, the zero-phase sequence current transformer, and the instrument voltage transformer are attached, and standing on the cart to cover the outer circumferences of three planes (front and both sides) of the circuit breaker; and two terminals are vertically disposed upside or downside on the back of the circuit breaker, one being connected to a fixed electrode of the circuit breaker and the other being connected to a movable electrode of the circuit breaker, the two terminals being connected to the communication bus and to the first leader bus or second leader bus through air bushings provided on the cabinet so as to move away from and toward the communication bus and the first leader bus or the second leader bus.

The invention discloses an outdoor primary and secondary fusion isolation knife built-in intelligent post switch, which comprises an aluminum alloy base and an aluminum alloy housing matched with thealuminum alloy base, The aluminum alloy housing is fastened on the aluminum alloy base to form an outer enclosure box, a plurality of isolation knife main circuit driving structures are arranged in the outer enclosure box, a left current sensor is arranged at the inner end of the left outlet terminal, and a right current sensor is arranged at the inner end of the right outlet terminal; The inner end of the outer enclosure is provided with a hollow chamber, A power operating mechanism is installed in the hollow chamber, The power operation mechanism comprises a front panel and a rear panel, a component mounting chamber is formed between the front panel and the rear panel, and an isolation power mechanism for controlling the separation knife to separate and close, a circuit breaker power mechanism for controlling the circuit breaker to be on and off, and a circuit breaker closing energy storage mechanism for circuit breaker to be on and off for energy storage are installed in the component mounting chamber; The whole power operation mechanism can provide power source to the circuit breaker and the isolating knife separately or simultaneously.

The invention relates to a winding structure of a transformer, particularly to a foil low-voltage winding structure for high voltage of a rectifier transformer. The winding structure comprises a high voltage winding and at least two parallelly connected low voltage windings arranged between an iron core and the high voltage winding, wherein the low voltage windings are made of copper foil or aluminum foil through winding, and a plurality of low voltage windings are in parallel connection and arranged along the axial direction of the transformer. According to the winding structure of the transformer, the production process is simple, wire outlet is convenient, the insulation distance is small, materials are saved, and consumption is reduced.