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

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 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.

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 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 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 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.

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 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.