A single phase control transformer

Abstract

The utility model discloses a single -phase control transformer, including first isolation insulation protection shell, second isolation insulation protection shell, iron core, iron core post, winding, isolation insulation board and wiring terminal, first isolation insulation protection shell and second isolation insulation protection shell set up respectively on the two side walls of iron core, and iron core post sets up in the middle of iron core, and winding is wound on the outer peripheral wall of iron core post, and isolation insulation board sets up respectively on the front and rear two side walls of winding, and wiring terminal sets up respectively on the end wall of first isolation insulation protection shell and second isolation insulation protection shell. The utility model discloses a technical scheme can effectively promote the long -term reliability and energy efficiency of transformer, and the heat dissipation capacity is strong, and the assembly is firm and reliable, and the anti -vibration ability is strong, and the insulation performance is excellent, can effectively avoid transformer electric leakage risk, can ensure the safe operation of transformer.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a single-phase control transformer. Background Technology

[0002] A single-phase transformer is a device that changes AC voltage using the principle of electromagnetic induction. It consists of a primary coil, a secondary coil, and an iron core. The iron core is made of laminated or wound silicon steel sheets. The windings are divided into two types: concentric and interleaved. It is characterized by its simple structure and small size. Single-phase transformers have a simple structure, small size, and low loss, mainly low iron loss, making them suitable for application and promotion in low-voltage distribution networks with low load density.

[0003] However, most ordinary single-phase transformers on the market currently use aluminum wire or copper-aluminum hybrid windings. These windings have low conductivity and high losses, which can significantly increase energy waste during long-term operation. Furthermore, their insulation performance, temperature resistance, vibration resistance, and thermal expansion and contraction resistance are not ideal, which can easily affect the safety and service life of the transformer. Utility Model Content

[0004] The main objective of this invention is to propose a single-phase control transformer, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention proposes a single-phase control transformer, comprising a first isolation and insulation protective shell, a second isolation and insulation protective shell, an iron core, an iron core column, a winding, an isolation and insulation plate, and terminals. The first and second isolation and insulation protective shells are detachably disposed on the two side walls of the iron core. The iron core is formed by stacking silicon steel sheets, and the outer surface of each silicon steel sheet is coated with an organic resin insulation layer. The iron core column is disposed in the middle of the iron core, and the winding is wound on the outer peripheral wall of the iron core column. The isolation and insulation plates are respectively disposed on the front and rear side walls of the winding, and the isolation and insulation plates abut against the inner side wall of the iron core. Both ends of the winding and the isolation and insulation plates are located inside the first and second isolation and insulation protective shells. The terminals are respectively disposed on the end walls of the first and second isolation and insulation protective shells, and the terminals are electrically connected to the winding. The winding is formed by enameled wire, and the enameled wire includes a pure copper conductor. The outer peripheral wall of the pure copper conductor is coated with an insulating varnish layer.

[0006] Optionally, it also includes fastening screws and nuts. The first isolation insulating protective shell, the second isolation insulating protective shell, and the four apex corners of the iron core are each provided with a through hole. The fastening screws are respectively installed through the through holes, and the nuts are respectively screwed on both ends of the fastening screws.

[0007] Optionally, the sidewalls of the first and second isolation insulating protective shells are provided with a plurality of first heat dissipation grooves, and the bottoms of the first and second isolation insulating protective shells are respectively provided with an air inlet.

[0008] Optionally, the lower ends of the first and second isolation insulating protective shells are respectively provided with U-shaped mounting holes on both sides.

[0009] Optionally, the pure copper conductor is made of T2 copper.

[0010] Optionally, the diameter of the pure copper conductor ranges from 6.5 mm to 10 mm.

[0011] Optionally, the insulating varnish layer is formed using polyesterimide varnish.

[0012] Optionally, both the first and second insulating protective shells are made of glass fiber reinforced plastic.

[0013] Optionally, the insulating plate is formed of polyimide board, and multiple second heat dissipation grooves are provided at both ends of the insulating plate.

[0014] Optionally, the inner sidewalls of the first and second isolation insulating protective shells are respectively provided with a limiting groove adapted to the iron core, and the two ends of the iron core are respectively embedded in the limiting groove.

[0015] The technical solution of this utility model has the following beneficial effects: The technical solution of this utility model involves a first and a second isolation insulating protective shell detachably mounted on the two side walls of the iron core. The iron core is formed by stacking silicon steel sheets, and the outer surface of each silicon steel sheet is coated with an organic resin insulating layer. The iron core column is located in the middle of the iron core, and the winding is wound around the outer peripheral wall of the iron core column. Isolation insulating plates are respectively mounted on the front and rear side walls of the winding, and the isolation insulating plates abut against the inner side walls of the iron core. Both ends of the winding and the isolation insulating plates are located inside the first and second isolation insulating protective shells. Terminals are respectively located within the first and second isolation insulating protective shells. On the end wall, the terminals are electrically connected to the windings. The windings are formed using enameled wire, which includes pure copper conductors. The outer peripheral wall of the pure copper conductors is coated with an insulating varnish layer, thereby effectively improving the long-term reliability and energy efficiency of the transformer. Long-term use can reduce unnecessary energy waste, and it has strong heat dissipation capacity, good high-temperature stability, and firm and reliable assembly. It also has strong vibration resistance. The windings are not prone to breakage or loosening during assembly, transportation, and long-term operation, which enables the transformer to have excellent electrical insulation and aging resistance. It can effectively avoid the risk of transformer leakage and ensure the safe operation of the transformer. It can be applied to industrial control and low-voltage equipment power supply fields, providing safe control power for PLCs, frequency converters, relays, contactors, solenoid valves, etc. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a single-phase control transformer according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of a single-phase control transformer according to an embodiment of the present invention from another perspective. Figure 3 This is a schematic diagram of the overall structure of a single-phase control transformer according to another embodiment of the present invention. Figure 4 This is an exploded structural diagram of a single-phase control transformer according to an embodiment of the present invention. Figure 5 This is another exploded structural diagram of a single-phase control transformer according to an embodiment of the present invention.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] This utility model proposes a single-phase control transformer.

[0023] like Figures 1 to 5As shown, in one embodiment of this utility model, the single-phase control transformer includes a first isolation and insulation protective shell 101, a second isolation and insulation protective shell 102, an iron core 103, an iron core column 104, a winding 105, an isolation and insulation plate 106, and terminals 107. The first isolation and insulation protective shell 101 and the second isolation and insulation protective shell 102 are detachably disposed on the two side walls of the iron core 103. The iron core 103 is formed by stacking silicon steel sheets, and the outer surface of the silicon steel sheets is coated with an organic resin insulation layer. The iron core column 104 is disposed in the middle of the iron core 104, and the winding 105 is wound on the outer peripheral wall of the iron core column 104. The isolation and insulation plate 106 is disposed on the front and rear side walls of the winding 105, and the isolation and insulation plate 106 is respectively disposed on the inner side of the iron core 103. The winding 105 and the insulating plate 106 are both located inside the first insulating protective shell 101 and the second insulating protective shell 102. The terminals 107 are respectively disposed on the end walls of the first insulating protective shell 101 and the second insulating protective shell 102. The terminals 107 are electrically connected to the winding 105. The winding 105 is formed by enameled wire, which includes a pure copper conductor. The outer peripheral wall of the pure copper conductor is coated with an insulating varnish layer. The pure copper conductor winding has high conductivity, and the copper loss (Joule loss) when current passes through is much lower than that of the aluminum winding, which can reduce energy waste and improve the operating efficiency of the transformer. In addition, copper has good thermal conductivity, and the heat generated by the winding can be quickly transferred to the iron core or heat dissipation structure, avoiding local overheating that leads to insulation aging and extending the service life of the transformer.

[0024] Specifically, it also includes fastening screws 108 and nuts 109. The first isolation and insulation protective shell 101, the second isolation and insulation protective shell 102 and the four apex corners of the iron core 103 are respectively provided with through holes 110. The fastening screws 108 are respectively installed through the through holes 110, and the nuts 109 are respectively screwed on both ends of the fastening screws 108. This makes the assembly, disassembly and maintenance of the transformer convenient and quick, and the assembly is reliable and secure, thereby improving the transformer's vibration resistance.

[0025] Specifically, the side walls of the first isolation and insulation protective housing 101 and the second isolation and insulation protective housing 102 are provided with a plurality of first heat dissipation grooves 111, and the bottom of the first isolation and insulation protective housing 101 and the second isolation and insulation protective housing 102 are respectively provided with an air inlet (not shown). The structural design of the first heat dissipation grooves and the air inlet can guide the natural convection of air. Hot air is dissipated along the first heat dissipation grooves, and cold air is replenished from the air inlet at the bottom, forming a continuous air circulation, thereby accelerating the transfer of heat from the inside of the transformer to the air, ensuring that the heat generated by the transformer during operation can be discharged in time, and avoiding the degradation of insulation performance due to excessive temperature.

[0026] Specifically, the lower ends of the first isolation and insulation protective housing 101 and the second isolation and insulation protective housing 102 are respectively provided with U-shaped mounting holes 112 to facilitate the installation and fixing of the transformer.

[0027] Specifically, the pure copper conductor uses T2 copper, which has excellent electrical and thermal conductivity, low loss, high heat dissipation efficiency, and strong reliability. It can reduce energy waste during transformer operation, directly improve transformer efficiency, and the efficient heat dissipation can prevent insulation aging caused by local overheating of the windings, while reducing the risk of failure caused by overheating. It has strong oxidation and corrosion resistance. In a dry environment or at normal operating temperature, a dense cuprous oxide protective film will form on the surface of pure copper, which can prevent further oxidation of the internal metal and effectively extend the service life of the transformer. Copper has better tensile strength and fatigue resistance than aluminum, and the windings are less prone to breakage, loosening, and deformation during assembly, transportation, and long-term operation, resulting in a longer service life.

[0028] Specifically, the diameter of the pure copper conductor ranges from 6.5mm to 10mm. The pure copper conductor winding ensures good conductivity and heat dissipation, which can effectively reduce the temperature of the transformer during operation and improve the service life and stability of the equipment.

[0029] Specifically, the insulating varnish layer is formed using polyesterimide varnish. Polyesterimide varnish has strong high-temperature resistance, excellent insulation performance, and high mechanical strength. It can maintain stable insulation performance in the high-temperature environment of transformer operation and will not fail due to high temperature. Compared with ordinary alkyd varnish and epoxy varnish, its thermal aging rate is slower, and the increase in dielectric loss (dielectric loss tangent) at high temperatures is smaller, resulting in stronger long-term operational reliability. The varnish film formed after curing has high dielectric strength (typically ≥40kV / mm) and high volume resistivity (≥10¹). 4 (Ω・cm), which can effectively isolate current leakage between winding conductors and avoid short circuit faults. Even in humid or slightly polluted environments, the insulation performance decays slowly and can still maintain a stable electrical isolation effect.

[0030] Specifically, both the first isolation and insulation protective shell 101 and the second isolation and insulation protective shell 102 are made of glass fiber reinforced plastic (FRP). FRP has excellent electrical insulation and aging resistance, which can effectively avoid the risk of transformer leakage. Unlike metal parts, it does not require regular rust removal and painting maintenance. Daily cleaning is sufficient, which greatly reduces the later maintenance costs.

[0031] Specifically, the insulating plate 106 is made of polyimide board, which has excellent dielectric properties, stable dielectric constant, low dielectric loss, and good insulation properties, which can ensure the safe operation of the transformer.

[0032] Specifically, the two ends of the isolation insulation plate 106 are provided with multiple second heat dissipation grooves 1061, which play a role in accelerating heat dissipation and ensuring that the heat generated by the transformer during operation can be discharged in a timely manner.

[0033] Specifically, the inner sidewalls of the first isolation and insulation protective shell 101 and the second isolation and insulation protective shell 102 are respectively provided with a limiting groove 113 adapted to the iron core 103. The two ends of the iron core 103 are respectively embedded in the limiting groove 113, which plays a good limiting role for the iron core, avoids displacement and loosening of the iron core, and improves the vibration resistance of the transformer.

[0034] Specifically, the working principle of this utility model is as follows: By using pure copper windings, compared to copper-clad aluminum and pure aluminum windings, the physical and electrical properties of pure copper directly improve the long-term reliability and energy efficiency of the transformer. The copper loss (Joule heat loss) when current passes through the windings is significantly reduced, which can reduce unnecessary energy waste in the long term. It also has strong heat dissipation capacity, good high-temperature stability, and the heat generated by the windings can be quickly conducted to the iron core to avoid local overheating. Furthermore, the assembly is firm and reliable, and the vibration resistance is strong. The windings are not prone to breakage or loosening during assembly, transportation, and long-term operation. Through the first isolation insulation protective shell, the second isolation insulation protective shell, and the isolation insulation plate, the transformer can have excellent electrical insulation and aging resistance, which can effectively avoid the risk of transformer leakage and ensure the safe operation of the transformer.

[0035] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A single-phase control transformer, characterized in that, The device includes a first insulating protective shell, a second insulating protective shell, an iron core, an iron core column, a winding, insulating plates, and terminals. The first and second insulating protective shells are detachably mounted on the side walls of the iron core. The iron core is formed by stacking silicon steel sheets, and the outer surface of each silicon steel sheet is coated with an organic resin insulating layer. The iron core column is located in the middle of the iron core. The winding is wound around the outer peripheral wall of the iron core column. The insulating plates are respectively mounted on the front and rear side walls of the winding, and the insulating plates abut against the inner side walls of the iron core. Both ends of the winding and the insulating plates are located inside the first and second insulating protective shells. The terminals are respectively mounted on the end walls of the first and second insulating protective shells and are electrically connected to the winding. The assembly is formed using enameled wire, which includes a pure copper conductor. The outer peripheral wall of the pure copper conductor is coated with an insulating varnish layer. It also includes fastening screws and nuts. The first insulating protective shell, the second insulating protective shell, and the iron core each have a through hole at their four apex corners. The fastening screws are respectively inserted through the through holes, and the nuts are respectively screwed onto the two ends of the fastening screws. The side walls of the first insulating protective shell and the second insulating protective shell have multiple first heat dissipation grooves. The bottom of the first insulating protective shell and the second insulating protective shell each have an air inlet hole. The lower ends of the first insulating protective shell and the second insulating protective shell each have U-shaped mounting holes on both sides. The inner side walls of the first insulating protective shell and the second insulating protective shell each have a limiting groove that matches the iron core. The two ends of the iron core are respectively embedded in the limiting groove.

2. The single-phase control transformer according to claim 1, characterized in that, The pure copper conductor is made of T2 copper.

3. The single-phase control transformer according to claim 2, characterized in that, The diameter of the pure copper conductor ranges from 6.5 mm to 10 mm.

4. The single-phase control transformer according to claim 1, characterized in that, The insulating varnish layer is formed using polyesterimide varnish.

5. The single-phase control transformer according to claim 1, characterized in that, Both the first and second isolation and insulation protective shells are made of glass fiber reinforced plastic.

6. The single-phase control transformer according to claim 1, characterized in that, The insulating plate is made of polyimide and has multiple second heat dissipation grooves at both ends.

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