RU190385U1 - THROTTLE INTERFERENCE - Google Patents

Abstract

Interference suppression choke is used to reduce the level of radio interference in the chain of devices for the suppression of electric rolling stock. The choke contains a layer-wound cylindrical winding installed on at least one insulator and is wound with an insulated wire. Moreover, the layers of the winding are separated by insulating vertical strips. Frame bars can be fixed to at least one insulating ring. The choke is placed mainly on three insulators located offset from the axis of the winding to the outer diameter. The layers of the winding are divided into vertical sections of several turns in each, while the vertical strips may have grooves to accommodate each section. Outside on the winding impose a bandage. 5 hp f-ly, 3 ill.

Description

The utility model relates to electrical engineering, in particular, to devices operating as part of a chain of interference suppression devices for electric rolling stock. The interference suppression choke serves to reduce the level of radio interference caused by the sliding contact of the current collector and is included in the electric locomotive power circuit.

To reduce radio interference generated by the operation of electric locomotives and electric trains, use reactors (chokes), filters and interference suppression capacitors. The throttles are connected to a direct current electric rolling stock in series between the current collector and the high speed switch. Behind the choke, from the side of the power circuit, connect a capacitor through which the higher harmonics of the traction current close to the case (ground), without penetrating into the contact network and without interfering with radio reception. On electric rolling stock AC reactor (choke) include between the current collector and the air switch on the locomotive, in addition between the air switch and the high voltage winding of the traction transformer also include a filter.

Such a choke suppression consists of a coil without a steel core, wound from copper tape. It is strengthened either on a porcelain insulator, using wooden strips, or on squares. The coil of the throttle D-51 is wound flat and impregnated in PE-933 lacquer, the throttle DR-027T - on a narrow rib. Throttles are made with natural air cooling, they have almost constant inductance, independent of the load. D-51 throttles are installed on the roof of an electric locomotive, and ДР-027Т - on the basis of a current collector [“Electric locomotives and electric trains”, V. Kalinin - M: Transport, 1991.- p.196], [Electric locomotive VL80. Manual. Ed. B.R. Bondarenko, M., Transport, 1977, pp. 108 - 109].

It is known to use as a general protection against the interference of trams and trolley buses of interference suppression reactors, which are flat inductors with a large diameter without a steel core. Coils are made of copper or aluminum tires with micanite interturn insulation, followed by impregnation. Two or three coils are mounted on a wooden base and on top they are covered with a wooden lid. Reactors are mounted on porcelain insulators on a pedestal in front of current collectors. Coils of reactors are connected in series with current collectors and parallel to each coil connect the trimming capacitors [Koryagina EE, Kos'kin OA, “Electrical equipment for trams and trolley buses” - M .: Transport, 1982. - 296 s, chapter 29 fig. 63]. It is also known to use a radio co-ordinator in trolley buses from a flat coil wound with an aluminum tire or sucker-wire. The radio reactor is connected in series to the circuit of current collectors, which increases the internal resistance of electrical equipment and reduces radio interference [“Trolleybus device”, ed. Zaitseva M.Yu., Shtamler AI, - Novosibirsk, p. 79, fig. nineteen].

The design of the throttle D-51 uses wood - a material that is subject to burning and rotting, as well as providing a low heat resistance class (“A” according to GOST 8865-93); the coil does not have cooling air channels, therefore it has low air permeability and a high risk of accumulation of dirt on the ends.

The flat-oval coil used to create the throttle DR-027Т is complex and low-tech, has no supporting insulation and is designed for a voltage class of 3kV. The possibility of using chokes for a higher voltage class, for example, 25 kV, has not been confirmed by available information. The described solutions for urban electric transport (trams, trolley buses) are similar to the design of the throttle (reactor) D-51 and have the same drawbacks.

Known choke, which is part of the filter suppression of radio interference generated during the operation of electrical equipment [Interference suppressor DR-150U2 electric locomotive 2ES6, Electric locomotive 2ES6. Mechanics, engines, vehicles (A. Malgin) - 2010, Access Mode: http://zinref.ru/000_uchebniki/05301_transport_jd_elektrovozi/002_ 00_elektrovoz_2ES6mekhanika_raspolozhenie_apparatov_malgin_2010 / 016.httm The throttle contains two coils of strip copper tape, connected in parallel and secured to the two frames with studs and fasteners. Insulators, tubes and washers are used to isolate the coils from the frame. The choke is installed behind the fence in the high-voltage chamber, inside the body and is connected in series to the power circuit of the locomotive. One output choke is connected to the current collector through a disconnector, and the second to a high-speed switch. Metal parts have anti-corrosion protective and decorative coating, except for parts that are not subject to corrosion. Together with the capacitors, a suppressor filter of radio interference generated by an electric locomotive during the flow of power current is formed in the power circuit.

Also known choke noise suppression of rolling stock [Patent RU168706, Prior. 10/19/2016, publ. 16.02.2017, H01F 27/32 (2006.01)], containing a breathable inductance coil with initial and final leads, installed with the help of supporting and fixing fittings in the supporting structure. The inductor is made in the form of a screw sectioned coil. The supporting structure consists of two flat rectangular frames interconnected through an inductance coil supporting fixture, and the initial and final conclusions of the sections of the coil inductance are connected in pairs by a U-shaped jumper with the formation of a parallel connection with a horizontal arrangement of the axes of the sections of the coil inductance, while in the jumper holes for connecting to the electric rolling stock electrical circuit are made.

The throttle DR-150U2 and the design of the choke, known by the patent RU168706, are similar in their essence, are designed to work in an alternating current network with a voltage of 3 kV, and therefore are insufficient for operation in networks with a large voltage class, for example, 25kV, inter-turn and support insulation.

In addition, all the described analogs are united by one constructive solution - making coils (windings) with an uninsulated conductor with insulation applied either in the manufacture of gaskets between coils, or after production in the form of a lacquer coating. These solutions, on the one hand, due to the presence of additional operations, reduce the manufacturability of products, and on the other, reduce its reliability, since it is very difficult to control the uniformity and quality of insulation applied during manufacture or after manufacture.

The technical problem addressed by the utility model is the creation of a noise suppression choke with a reliable and technological design, designed to work in the power circuit of a current collector of an electric locomotive at any voltage class known for electrified railways. The technical result is to ensure the reliability of the device, necessary for the operation of the device under the specified conditions.

The inventive interference suppression choke contains a layer-wound cylindrical winding installed on at least one insulator and is wound with an insulated wire. Moreover, the layers of the winding are separated by insulating vertical strips, which are fixed in order among themselves, forming the common framework of the winding. The slats allow you to securely fix the wire, increasing the rigidity of the winding, as well as to form cooling channels, increasing the resistance of the device to overheating.

Additionally, the reliability of the device during its operation can be ensured as follows.

The framework bars can be fixed on at least one insulating ring, which allows them to be evenly distributed around the circumference and securely fixed. To increase the resistance of the supporting insulation to external influences will allow the placement of the choke on three insulators located offset from the axis of the winding to the outer diameter. The layers of the winding to reduce the mechanical forces on the insulation of the coils are performed with the division into vertical sections of several turns in each, while the vertical strips have grooves to accommodate each section. Outside, a bandage may be applied to the winding to provide additional rigidity.

The essence of the claimed utility model is illustrated by drawings, which depict a choke in the preferred embodiment:

in fig. 1 - throttle front view,

in fig. 2 - view of the throttle from above,

in fig. 3 - sectional winding.

To confirm the possibility of the implementation of the utility model of its purpose and achieve the stated technical result, we consider the version of the interference suppression choke.

The interference suppression choke (see Fig. 1) is installed on the roof of an electric locomotive and contains a layered cylindrical winding 1 (inductance coil) wound on a frame and fixed on insulators 3.

Layer cylindrical winding is one of the most technologically advanced, in terms of winding, along with, for example, disc windings. But at the same time, the layered cylindrical winding is more reliable from the point of view of cooling due to the presence of air layered channels, and also has better mechanical strength, since it has the ability to ensure the fastening of each layer separately.

The layers of winding 1 are made of insulated rectangular wire. The presence of insulation on the wire eliminates the need to apply insulation during manufacture, while monitoring the quality of the insulation can be made prior to the manufacture of the product. Insulated wire improves the reliability of the winding 1 of the choke when operating at high voltages, for example, in the short circuit mode, when the voltage drop across the winding 1 is almost equal to the linear voltage of the current collector.

The layers of the winding 1 are separated by insulating vertical strips 2 (see Fig. 2, 3), thereby providing axial cooling channels, good winding permeability, which increases the reliability of the device in terms of resistance to overheating. Winding is performed on strips 2, the rows of which are tightened between each other by fasteners. Slats 2 can be made with grooves to ensure the division of layers into sections, which improves the manufacturability of the device.

The bars 2 of the frame can be fixed on at least one insulating ring 4 (see Fig. 2, 3). Preferably, two rings 4 are used on the upper and lower ends of the frame on which the insulating strips 2 are installed. The rings 4 during winding allow to distribute the strips 2 evenly around the circumference and set them in rows, which gives additional rigidity to the winding frame 1 and facilitates assembly. The use of rings 4 increases the reliability of the device in terms of resistance to external mechanical factors, vibration, single blows.

Thus, the frame consists of axial vertical insulating strips 2, fixed to the insulating rings 4. Preferably, a fiberglass laminate frame is used, which provides the necessary level of mechanical strength for winding 1 and an increased class of heat resistance (class "F" or "H").

To reduce the mechanical forces on the insulation of the turns, the layers of the winding 1 can be divided into vertical sections, several turns each, which increases the reliability of the device in the modes of flow of short-circuit currents. Sections can be formed, for example, by placing insulating gaskets between them or, more technologically, by using insulating vertical strips 2 with pre-formed grooves for each section.

The use of insulators 3 (for example, polymer) provides a given level of electrical strength of the reference insulation for a nominal voltage, for example, 25 kV. The choke can be placed on three insulators 3 at their location offset from the axis of the winding 1 to its outer diameter (see Fig. 1). This increases the allowable effort for bending and stretching from external mechanical factors - vibration and single shocks, which increases the reliability of the device.

Outside, a bandage, for example, made of glass tape, can be applied to the winding 1, which gives the structure additional rigidity and also protects it from dust and dirt entering the channels between sections of the winding layers 1. Thus, an increase in the reliability of the device can be achieved and climatic factors, as well as resistance to dynamic forces in winding 1 during the flow of short circuit currents.

The number of turns in winding 1 is chosen in such a way as to provide the required nominal inductance, for example, (250 ± 8) µH. The number of wires and their cross-section is chosen so as to provide the required long-term rated current, for example, 550 A. When dividing the layers into sections, the number of turns in each section is chosen so that the mechanical voltage in the wire insulation from the action of the total force in the turns of each section did not exceed the allowable mechanical stress to isolate the selected wire.

Thus, the utility model ensures the reliability of the device, which allows to operate the choke in the power circuit of the locomotive of the locomotive at any voltage class.

Claims (6)

1. A choke suppressor containing a layer-wound cylindrical winding installed on at least one insulator wound by an insulated wire, the winding layers being separated by insulating vertical strips fixed in order between themselves and forming a common winding frame. 2. The choke according to claim 1, characterized in that the frame of the frame is fixed on at least one insulating ring. 3. The choke according to claim 1, characterized in that the choke is placed on three insulators located offset from the axis of the winding to the outer diameter. 4. Choke according to claim 1, characterized in that the layers of the winding are divided into vertical sections of several turns in each. 5. The choke according to claim 4, characterized in that the vertical strips have grooves to accommodate each section. 6. Choke according to claim 1, characterized in that a bandage is applied to the outside of the winding.

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