Do you know the knowledge of enameled wire?

Enameled wire coating is mainly used for coating and insulation of enameled wire cores. Since the wire will be subjected to heat, chemical and various mechanical forces in the process of winding coils and embedding wires, the enameled wire paint is required to have good coating properties (that is, uniform coating), and strong paint film adhesion.

According to the characteristics and uses of insulation, winding wires can be divided into four categories: enameled wires, wrapped wires, special winding wires, and inorganic composite winding wires.

Main Applications:
All kinds of household electric motors, vacuum cleaner motor, electric motor
All kinds of transformers, inductors, rectifiers
All kinds of fan motor
All kinds of high frequency electric appliance

Insulation description: Enamelled / Fibreglass / Nomex / Paper / Mica
Applications: high-voltage coils, relays, transformers, hand tool motors, electronic coils, etc.
Temperature resistance grade: According to the selected bottom insulation wire, there are 130, 155, 180, 200, 220 degrees and other temperature resistance grades

Direct-welding enameled wire is named after its insulating layer uses an insulating material that can be directly destroyed at 360~420¡ã, and it can be directly welded without removing the insulating layer in advance during welding. Direct welding enameled wire is currently widely used in various industries of electromagnetic coils (motors, electroacoustics, inductance, etc.). As for whether it can be used to wind the motor coil, it mainly depends on the motor power or the working environment of the coil, and there is no problem within a certain temperature range.

Winding wires used in electrical equipment are usually called magnetic wires. In other words, “magnetic wires are used to exchange electrical energy and magnetic energy.” Magnetic wire is roughly divided into enameled wire (insulation coated) and coated wire (fiber/film insulation) and their combinations. The two types of magnetic wires and their performance are very different. ASTM (American Society for Testing and Materials) B193, no more than 0.017241 ohm (square millimeter/meter), the film or coating should meet the latest version of ANSI, ASTM or NEMA applicable standards, and modify the specified resin. The modified resin is Chemically changed resin, or containing one or more additives to retain the basic chemical characteristics of the original resin to enhance certain performance or application characteristics, the coated conductor needs to meet all the required test requirements of the appropriate NEMA standard (UL certification project) .

In the long-term thermal aging test, three or more temperature points are usually selected for accelerated aging, commonly known as “three-point aging”.

The samples for the aging test are stranded enameled wire pairs. The production of the stranded pairs should meet the requirements of ASTM D2307 or NEMA 1000 standards, including the weight to be applied when making the stranded pairs, the number of twisted turns, the effective length of the stranded area, and The length of the two ends of the twisted pair, etc. When making a twisted pair, the required force and the number of twist turns will vary depending on the diameter of the wire. The effective length of the stranded area has nothing to do with the wire diameter, the effective length is 121¡À6 mm, and the two ends are at least 50 mm long. At least 10 twisted pairs per temperature point and mounted on twisted pair racks for high temperature aging test.

1. Polyester enameled wire (P.E.W.)
Polyester enamel-covered wire is made of heat-resistant Terephthalic Polyester resin as the main grease as the insulating film and baked on the conductor. Its characteristics are as follows:
¡ñThe heat resistance is superior to synthetic tree (P.V.F.) enameled wire and U.E.W. enameled wire.
¡ñExcellent chemical resistance (except alkaline) and solvent resistance.
¡ñThe mechanical strength is comparable to synthetic resin (P.V.F.).
¡ñThe force rate and dielectric rate are comparable to U.E.W. enameled wire.
¡ñAlkali resistance and moisture resistance are better than synthetic resin enameled wire (P.V.F).

The paper covered wire is a type of enameled wire that is extruded or pulled by an oxygen-free copper rod or an electrical circular aluminum rod, and then annealing the wire, and then winding two layers or two layers of insulating on the copper (aluminum) conductor.Paper (including telephone paper, cable paper, high voltage cable paper, turns], suitable for oil immersion transformer coils and other similar electrical windings.Electrical bare copper (aluminum) wires produced by extrusion process are the most ideal materials for the production of cable paper wraps.

The space factors of magnet wires are compared in the right figure. The space factors of enamelled wires are superior to those of other wires for winding, as are their electrical properties. However, more careful examination must be made of the following properties as compared with other wires.

The lacquered wire is composed of two of the conductor and the insulating layer. After the bare wire is deck, after multiple painting, baking.The enameled wire can be used in transformers, motors, motors, electrical, ballasts, inductance coils, disadvantages, audio coils, microwave coils, electric fans, instrumentation, and the like.

Enameled wire production water also has many uses, and similarly, the requirements for water quality are also different. According to the water quality requirements of the purpose of use, it can be divided into: annealing furnace sealing water, equipment cooling water, lubricant manufacturing water, etc.

1. Mechanical functions: including elongation, rebound angle, softness and adhesion, paint scraping, tensile strength and other items.
(1) Elongation reflects the plastic degeneration of the material and is used to check the ductility of the enameled wire.
(2) The rebound angle, the softness reflects the elastic deformation of the material, and is used to check the softness of the enameled wire.
¢ÇThe durability of the paint film includes winding and stretching, that is, the promised tensile deformation of the paint film without cracking when the conductor is stretched and deformed.
(4) The adhesion of the paint film includes snap-off and peeling. First, check the adhesion of the paint film to the conductor.
(5) The scratch resistance test of the paint film reflects the strength of the paint film against mechanical scratches.

Magnet Wire: enameled wire, winding wire, enamelled wire, magnetic wire, conductor covered
Type: copper winding wire, aluminum enameled wire
Application: motors, generators, transformers, and electric vehicles
Thermal Class: 130, 155, 180, 200, 220, 240

Telephone cable is usually thought of only as a communication medium operating at a normal 48 Vdc level. But telephone cable is regularly used by telephone operating companies to supply power to remote telephony equipment such as: PCM (Pulse Code Modulation) repeaters, FDM (Frequency Division Modulation) repeaters, telegraph and various types of control circuits. The normal talk battery voltage is regularly exceeded in the case of long subscriber loops utilizing loop extenders and on dial long line circuits which operate in the 70 to 100 Vdc range. For these applications, the referenced devices are generally current limited to approximately 150 milliamps. In all such cases, normal telephone industry practice usually limits pair-toground applied voltage to 150 Vdc, and pair-to-pair voltage is usually limited to 300 Vdc.

Inductive sensors have outstanding advantages such as simple structure, fast dynamic response, and easy non-contact measurement. They are especially suitable for acids, alkalis, chlorides, organic solvents, liquid CO2, ammonia, PVC powder, ash, oil and water. Liquid level measurement such as interface is currently widely used in metallurgy, petroleum, chemical, coal, cement, food and other industries.

In theory, any enameled wire can realize the mutual conversion between electric energy, magnetic energy and kinetic energy. However, the use of enameled wire has a processing process, and electrical products also have different working environments. Therefore, in the selection of enameled wire And when substituting, the characteristics of various enameled wires must also be considered.

Speaking of the copper enameled wire, I believe everyone should know. Today, we introduce you to a wire, ie the copper paint package. Let us simply look at the transportation and preservation of copper-clad aluminum wires, because if many wires are transported incorrect, it is very likely to be used, so let us simply understand the transportation and preservation of the copper paint wire, so you can be here.

The enameled wire manufacturer takes you to understand the high-temperature paint wrap of high-temperature paint wires, and it is necessary to judge, whether its appearance, size, and performance meet the technical standards of the product and user technical agreements. After the measurement, test, the technical standards of the product and the technical agreement of the product are compared to the requirements for qualified products, which does not meet the requirements for unqualified products.

3.1 Elongation:
The standard refers to GB/T6109, inspection method: stretch the instrument
Calculation method: ratio of (length after stretching-length before stretching)/length before stretching;

3.2 Snap off:
The standard is to pull at a speed of 2 meters per second to check that the paint film is not cracked,

3.3 Round rod winding:
Wrap the enameled wires of different specifications and the corresponding copper rods around ten times to check that the paint film is not cracked. The diameter of the copper rods refers to the requirements of GB/T6109;

3.4 Thermal shock: Put the winding enameled wire in an oven (hanging in the middle of the oven) for 0.5 hours. The temperature of the oven corresponds to the specification requirements of the enameled wire. Refer to GB/T6109. After the drying, check that the paint film is not cracked.

Correspondence table of enameled wire diameter and resistance value
The resistivity of the copper wire ρ= 0.0172, the aluminum wire ρ = 0.0283, the wire resistance calculation formula:
R=ρ×L/S
(L = wire length, unit: meter, S = wire cross section, unit: mm^2)

The current mainly passes along the copper-clad aluminum wire on the surface of the wire, which is called the skin effect. The higher the frequency, the more obvious it is. The copper-clad aluminum wire uses this feature to save material. But its resistivity is slightly higher than that of pure copper wire, and the resistivity is also different with the thickness of the copper clad.

British Standard Wire Gauge (often abbreviated to Standard Wire Gauge or SWG) is a unit for denoting wire size given by BS 3737:1964 (now withdrawn). It is also known as the Imperial Wire Gauge or British Standard Gauge. Use of SWG sizes has fallen greatly in popularity, but they are still used as a measure of thickness in guitar strings and some electrical wire. Cross sectional area in square millimetres is now the more usual size measurement for wires used in electrical installation cables. The current British Standard for metallic materials such as wire and sheet is BS 6722:1986, which is a solely metric standard.

Thermal Class: 130-220C
Conductor Material: Copper
Standard: IEC,NEMA,GB,JIS
Delivery time: 7-30 Days
Brand Name: LP Magnet Wire
Insulation: PEW, PIW, EIW, AIW, EI/AIW

1. Conductor resistance ¡ª The resistance of a conductor is proportional to its length and inversely proportional to its cross-sectional area.
2. Conductivity¡ªBased on the resistance 1/58ohm (0.017241 ohm) of a standard soft copper wire with a length of 1m and a cross-sectional area of 1mm2 at 20¡æ, it is called 100% conductivity. The greater the resistance, the lower the conductivity, and the two are inversely proportional.
3. Bending resistance¡ªfix one end of the single wire, add weight to the other end to make it vertically downward, and then bend it back and forth 180 times until the wire breaks. The more bending times, the stronger the bending resistance.
4. Tensile breaking force¡ªthe maximum load weight or force applied to the specimen to break it during a tensile test.
5. Tensile strength¡ªthe breaking force per unit area to bear when the sample is broken during the tensile test.
6. Elongation ¡ª the ratio of the length of the sample after being stretched until it breaks to the original length at the specified standard distance. Conductors have different impedances at different temperatures.
Generally, 20¡ãC or 25¡ãC is the standard. The higher the temperature, the greater the impedance.

3M paper covered aluminium wire feature :
* High dielectric strength/Excellent therm alstability/Wrapped tightly;
* Paper covered Aluminum wire is a special kind of magnet wires. Its conductors is electrical round aluminum rods which squeeze
and draw by the certain size of mold. And its insulations is special material;
* Our 3M paper covered aluminum wire uses two layers or several layers as the insulation layer;
* The wrapping direction of paper is same. And every layer paper twines conductors continually and compactly without wrinkles;
* Uses for oil-immersed transformers, reactors and other windings;

Principle: Water molecule (HHO) decomposes water into oxygen and hydrogen through electrolysis. Hydrogen is combustible. Oxygen supports combustion. These two gases are ignited to form a hydrogen-oxygen flame. In layman’s terms, “water turns into fire”

The enameled wire paint coats up to 30 layers of copper and aluminum wires to provide electrical insulation and help avoid short circuits in the coil. Such enameled wire paint must also have excellent chemical resistance and high temperature resistance, must have excellent adhesion with copper or aluminum wires, and also have excellent mechanical stability.
In some cases, such as for motors driven by frequency converters, a suitable insulation layer should be able to resist partial discharges that may cause short circuits and malfunctions in the engine.

Flat enameled wire is a type of enameled wire. It is a winding wire made of oxygen-free copper rods or electrical aluminum rods that are drawn, extruded or rolled by a certain specification die, and then coated with insulating paint for many times. The thickness is from 0.025mm To 2mm, the width is generally less than 5mm, and its aspect ratio ranges from 2:1 to 50:1. Flat enameled wire has a wide range of uses, especially in the windings of various electrical equipment such as telecommunication equipment, transformers, motors and generators.

Paper covered wire by Electrical Aluminium Pole extrusion die by a certain size or drawn wire after annealing, and then in the aluminum conductor wrapped more than two or two insulating paper (including paper, telephone, cable paper, high voltage cable paper, turn insulation paper) of the winding wire, suitable for oil-immersed transformers and other electrical winding with a similar wire. Produced by the extrusion process electrical bare aluminum wire is wrapped production of the cable wire is the best material.

ISO Certificated Polyimide Round Enamel Coated Magnet Wire has better performance than all other types of enameled wires. Polyimide paint film has only abrasion resistance slightly worse than polyester and polyvinyl acetal enameled wires. In order to improve this performance, most of the current Use polyester imide and polyamide imide to prepare enameled wire, which can increase the solid content of the paint, but the heat resistance is somewhat reduced.