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Magnet Wire – Zhengzhou LP Industry Co.,Ltd
  • Home
  • magnet wire
  • enameled aluminum wire
    • round aluminum wire
    • rectangular aluminum wire
  • enameled copper wire
    • round copper wire
    • flat copper wire
  • exhibition
  • factory
  • Contact
Online inspection of paint film continuity

Paint film continuity testing has used some offline testing methods, such as voltage mercury method, Japanese salt water method, low-pressure electrolyte method, etc., which are not suitable for online testing of enameled wire in the production process.

Online inspection of paint film continuity
Water fuel hydrogen-oxygen enameled wire welding machine

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”

Water fuel hydrogen-oxygen enameled wire welding machine
Popular application and classification of enameled wire

Enameled wire is a main type of winding wire. It is made of a metal conductor as a conductive inner core and coated with a polymer insulating layer. It is mainly composed of these two parts; it is the conversion of electromagnetic energy into mechanical energy, heat energy, sound energy, light energy or machinery Functional materials that convert energies such as heat, heat, chemistry, sound and light into electromagnetic energy.

Popular application and classification of enameled wire
How to cut and use the enameled wire?

1. Cutting
The enameled wire is composed of a conductor and an insulator, and the hardness of the two parts is very soft, so it can be cut by using a TabCUT-200 precision cutting machine with a general SiC cutting chip. Since the insulator is coated on the conductor, and its hardness and ductility are quite different, and the insulating layer has a certain degree of peeling, it is better to use some soft materials such as tin foil, rubber, etc. to wrap the cutting part when cutting. Up to prevent the insulation layer at the fracture from peeling off after cutting.

How to cut and use the enameled wire?
How to judge quality of Enameled wire?

After the product is manufactured, whether its appearance, size and performance meet the requirements of the technical standards of the product and the technical agreement of the user must be judged by the inspection beam and measured; the test shall be compared with the technical standard of the product or the technical agreement of the user and meet the requirements If it is qualified, otherwise, it is unqualified. Passing the inspection can reflect the stability of the enameled wire product quality, the material and the rationality of the process. Therefore, the quality inspection has the function of checking, preventing and identifying.

How to judge quality of Enameled wire?
Enameled wire characteristic test

¡ñ Conductor resistance. Measure with a conductor resistance tester, and then change to the value at 20¡ãC for comparison.
¡ñInsulation destruction voltage. Twist two enameled wires, apply voltage between the conductors, and judge by the damage voltage of the paint film. This performance is analyzed and judged through two tests of normal state and cold state breakdown voltage.
¡ñPaint film continuity (pinhole). Check the small holes of the paint film with a certain length of the test material. The project is tested by a high-pressure paint film continuity tester.

Enameled wire characteristic test
The hazards of pinholes on enameled wires

Enameled wire is the most widely used electromagnetic wire in the production of low-voltage products. A key performance requirement of this electromagnetic wire is the continuity of the paint film, which is to check the number of pinholes in the paint film under a certain length. When checking the number of pinholes, use a professional paint film continuity tester. The fewer the number of pinholes, the better the paint film integrity of the magnet wire.

The hazards of pinholes on enameled wires
Enameled wire welding paint removal

To weld the lead aluminum enameled wire, it is necessary to remove the paint (there are very few household electric fans with very low requirements, and the ballast manufacturer does not remove the paint). The paint removal methods are listed below.
(1) It can be scraped with a blade,
(2) It can be peeled with a centrifugal knife,
(3) The paint can also be rubbed off with a grinding wheel,
(4) Of course paint remover is also available,
(5) You can also use high-temperature tin to burn the paint,
(6) Some people burn with fire
(7) Of course you can also use paint remover to remove paint

Enameled wire welding paint removal
Paper insulated enameled transposition wire

Paper insulation enameled transposition conductor characteristics:
1. There is no circulating current, the eddy current loss in the coil is small, and the current density can be improved;
2. Simplify the winding process;
3. The full rate is higher than that of the paper-covered wire slot.

Paper-insulated enameled transposed wires are mainly used in the coils of large transformers.

Paper insulated enameled transposition wire
Withstand voltage 4kV double layer polyimide-fluorine 46 composite film wrapped round copper wire

Model
MYFE-4, a 4kV double-layer polyimide-fluorine 46 composite film wrapped round copper wire with a withstand voltage of 4kV.

Use characteristics
1. Excellent voltage resistance;
2. Excellent oil resistance;
3. Excellent high and low temperature resistance;
4. Excellent oil and water resistance under sealed conditions;
5. Excellent radiation resistance;
6. Excellent drag resistance.

Withstand voltage 4kV double layer polyimide-fluorine 46 composite film wrapped round copper wire
Selection of enameled wire

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.

Selection of enameled wire
Heat-bonded or solvent-bonded thick film polyurethane enamelled round copper wire

Model
QAN-2B, heat-bonded or solvent-bonded thick film polyurethane enamelled round copper wire.

Use characteristics
1. Under high frequency conditions, the dielectric loss tangent value is small.
2. It can be welded directly without scraping off the paint film.
3. Good colorability and can be made into enameled wires of different colors.

Heat-bonded or solvent-bonded thick film polyurethane enamelled round copper wire
fiberglass covered wire

The main advantages of fiberglass covered wire are:
1. The quality factor Q value is large;
2. Because it is twisted by multiple enameled wire bundles, it has good flexibility and can reduce the skin effect;
3. Because it is composed of polyurethane enameled wire, the dielectric loss angle is small, and it has direct solderability.
The disadvantage is: poor moisture resistance.

fiberglass covered wire
Constant voltage transformer

The constant voltage transformer integrates voltage stabilization, isolation, and transformation. It has a two-way filtering function that can eliminate noise from the power grid. It has good anti-interference ability. The output is sine wave or quasi-square wave. It is an ideal stabilized power supply for precision electronic instruments, microcomputers and numerical control equipment. There is a “day”-shaped iron core in the constant voltage transformer, the primary coil is in one window, and the secondary coil and resonant coil are in the other window. The resonant coil is connected to a resonant circuit whose resonant frequency is close to the frequency of the power supply.
When the primary power supply is connected, the resonant circuit oscillates to shallowly saturate the secondary iron core and form a constant alternating magnetic field. The magnetic induction intensity is within a certain range and is basically not affected by the input voltage change. The induced electromotive force remains unchanged. In this case, the primary input current only plays a role in supplementing energy.

Constant voltage transformer
Do you know the knowledge of enameled wire?

Enameled wire is a main type of winding wire. It consists of a conductor and an insulating layer. After the bare wire is softened by annealing, it is painted and baked many times. However, it is not easy to produce products that not only meet the requirements of the standard, but also meet the requirements of customers. It is affected by the quality of raw materials, process parameters, production equipment, environment and other factors. Therefore, the quality characteristics of various enameled wires are different, but they all have Mechanical properties, chemical properties, electrical properties, and thermal properties are four major properties.

Do you know the knowledge of enameled wire?
Heat resistance grade of enameled wire

The heat resistance class of enameled wire is the ambient temperature where the enameled wire can work normally for a long time (above 20000h).

Heat resistance grade of enameled wire
Various properties of copper wire

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.

Various properties of copper wire
How to connect copper wire and aluminum wire?

Aluminum wire is easy to oxidize in the air, forming a layer of oxide on its surface. In addition, aluminum is less hard than copper, which will greatly increase the contact resistance between the aluminum wire and the copper wire.

How to connect copper wire and aluminum wire?
Mechanical properties of enameled winding wire

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.

Mechanical properties of enameled winding wire
Performance and use of enameled wire

Enameled wires are widely used in industrial production, household appliances and other industries. The main properties and uses of various enameled wires are as follows: Various machines, communication equipment, meters, relays, small transformers, etc.

Performance and use of enameled wire
What is meant by winding wire?

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.

What is meant by winding wire?
Oxide film wire

Advantages of oxide film wire
1. The oxide film is not sealed by insulating paint, and the temperature resistance can reach 250¡æ. The heat resistance of the oxide film sealed with insulating paint depends on the temperature index of the insulating paint;
2. High slot full rate, light weight and good radiation resistance.

Oxide film wire
Composite Enamel Insulated Wire

The temperature resistance of composite enameled wire can reach above 520 degrees.
Composite enameled wire is an ideal wrapping wire for large-scale low-voltage and high-current electrical appliances such as power oil-immersed, dry-type, special transformers, electric welding machines, reactor rectifiers, electromagnetic separators, etc., with excellent electrical performance and stability.

Composite Enamel Insulated Wire
What are the requirements for the function and quality of the insulating paint used in the motor?

The insulating paint used in the motor can be divided into six types according to its purpose: impregnating paint, enameled wire paint, covering paint, silicon steel sheet paint, anti-corona paint and surface anti-rust paint.

What are the requirements for the function and quality of the insulating paint used in the motor?
Electrical performance of enameled winding wire

Resistance:
Take 1m of the enameled wire to be inspected, scrape off the paint film at both ends, measure the resistance of the enameled wire, the resistance measurement value should be within the resistance range of GB/T6109; the standard temperature is 20 degrees, the conversion formula: 20 degrees resistance/234.5+standard Temperature = actual measured resistance/234.5 + measured temperature;

Electrical performance of enameled winding wire
Production process of enameled copper wire

Pay-off (link pull) ¡ú annealing ¡ú painting ¡ú baking ¡ú cooling ¡ú lubrication ¡ú take-up

Production process of enameled copper wire
QZ-1/130 thin paint film polyester enamelled round copper wire

The 130L thin paint film polyester enameled round copper wire (QZ-1/130) belongs to the enameled wire under the winding wire classification.

Model and name
QZ-1/130, 130L thin paint film polyester enamelled round copper wire.

QZ-1/130 thin paint film polyester enamelled round copper wire
Working principle of electromagnetic coil

The electromagnetic coil is built by using the magnetic field around the wire, winding it into a spiral to strengthen the magnetic field, that is, using the smallest space to achieve the highest magnetic field strength, and replacing the ordinary wire with a wire covered with a layer of insulating paint is also to save space .

Working principle of electromagnetic coil
Specification measurement of enameled wire

Enameled wire is a kind of cable. The specifications of the enameled wire are expressed in terms of the diameter of the bare copper wire (in mm). The measurement of the enameled wire specification is actually the measurement of the diameter of the bare copper wire. It is generally used for micrometer measurement. The accuracy of the micrometer can reach 0.01mm. There are direct measurement methods and indirect measurement methods for the measurement of enameled wire specifications (wire diameter).

Specification measurement of enameled wire
Aluminum core magnet wire

Aluminum core magnet wire can be classified according to its basic composition, conductive core and electrical insulation layer. Usually according to the insulating material and manufacturing method used in the electrical insulation layer, it is divided into aluminum core enameled wire, aluminum core wound wire, aluminum core enameled wire and inorganic insulated wire.

Aluminum core magnet wire
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