Coil

A coil usually refers to a wire winding in a ring shape. Common applications of coils include: motors, inductors, transformers and ring antennas, etc.

The coil in a circuit refers to an inductor. It refers to the winding of wires one by one, with the wires insulated from each other. The insulating tube can be hollow or contain an iron core or a magnetic powder core, which is simply called an inductor.

An inductance coil is a device that operates based on the principle of electromagnetic induction. When current flows through a wire, a certain electromagnetic field will be generated around the wire, and the wire itself within this electromagnetic field will induce other wires within its range.

The effect on the wire itself that generates an electromagnetic field is called "self-induction", that is, the changing current produced by the wire itself generates a changing magnetic field, and this magnetic field further affects the current in the wire. The effect exerted on other wires within this electromagnetic field range is called "mutual inductance".

Inductors can be further classified into fixed inductors and variable inductors. A fixed inductor coil is simply called an inductor or coil. Denoted by L, the units are Henry (H), millihenry (mH), and microhenry (uH). 1H=10^3mH=10^6uH.

Coils can be classified into single-layer coils and honeycomb coils.

The wire excitation coil is a coil through which the current changes. There are magnetic field lines passing through the center of the coil. The greater the current, the more magnetic field lines there are. Until saturation, when the current is cut off, the magnetic field lines disappear.

The current-carrying coil used to excite the magnetic flux in the magnetic circuit is called the excitation coil (or excitation winding), and the current in the excitation coil is called the excitation current (or excitation current). If the excitation current is direct current, the magnetic flux in the magnetic circuit is constant and does not change over time. Such a magnetic circuit is called a direct current magnetic circuit. The magnetic circuit of a DC motor falls into this category. If the excitation current is alternating current, the magnetic flux in the magnetic circuit changes alternately over time. Such a magnetic circuit is called an alternating current magnetic circuit. The magnetic circuits of AC core coils, transformers and induction motors all fall into this category.

In the production and manufacturing of industries such as electronics and electrical engineering, coils, as core components, their production yield directly affects the production costs and market competitiveness of enterprises. With years of technical accumulation and practical experience in the field of automated winding equipment, Yeyi Automation Technology (Suzhou) Co., Ltd. has provided a systematic solution for improving the production yield of coils throughout the entire process from raw material selection to finished product output, and has become a trusted partner of many enterprises.

First, strictly control the quality of raw materials to consolidate the foundation of production

The quality of raw materials is the primary factor determining the yield of coil production. Yeyi Automation Technology assists enterprises in establishing a strict raw material screening mechanism and conducts comprehensive inspections on wires, insulating materials, etc. used for coil winding. Take enameled wire as an example. Yeyi ensures that the material purity, wire diameter tolerance, varnish film thickness and adhesion performance of the wire materials all meet the high standards by establishing long-term cooperative relationships with high-quality suppliers. By introducing advanced testing equipment, the electrical and mechanical properties of raw materials are precisely tested to eliminate problems such as coil short circuits, broken wires, and poor insulation caused by raw material defects from the source, laying a solid foundation for high-yield production.

Second, advanced equipment empowerment enables high-precision production

The square 8-shaped continuous winding vertical winding machine and other equipment developed and produced by Yeyi Automation Technology are core tools for improving the production yield of coils. The equipment adopts a high-precision servo motor drive system and numerical control technology, which can precisely control parameters such as winding speed, tension, number of turns, and Angle. During the winding process, the servo motor can quickly and stably adjust the rotational speed according to the program instructions, ensuring uniform winding speed and avoiding coil loosening or deformation caused by speed fluctuations. Meanwhile, the intelligent tension control system monitors the tension of the wire in real time and automatically adjusts the tension size according to the material and diameter of the wire, ensuring that each coil of wire is closely adhered. This effectively reduces the interlayer gap and inconsistent tightness of the coil, significantly improving the overall quality and yield of the coil.

In addition, the high-precision positioning function of the Yeyi vertical winding machine can control the winding position error within an extremely small range, ensuring the accuracy of the coil's external dimensions and the number of turns. Take the winding of transformer coils as an example. Traditional equipment may cause the coil size to exceed the tolerance due to positioning deviation, thereby affecting the performance and assembly of the transformer. However, the Yeyi vertical winding machine, with its accurate positioning precision, significantly improves the qualified rate of coil size and effectively reduces the scrap rate.

Iii. Optimize process management to ensure production stability

Yeyi Automation Technology is well aware that a scientific and reasonable production process is an important guarantee for improving the yield of coil production. The company's technical team, drawing on years of industry experience, formulates personalized production process plans for different types of coil products. From the selection of the winding mode, the design and debugging of the mold, to the optimal configuration of equipment parameters, every link has been repeatedly verified and optimized.

In terms of winding modes, the Yeyi vertical winding machine supports various complex winding modes such as square figure-eight continuous winding and multi-layer vertical winding. According to the structural characteristics and performance requirements of the coil, the most suitable winding method can be selected to ensure the electrical performance and mechanical strength of the coil. Meanwhile, the company attaches great importance to the design and manufacturing quality of molds. Through its independently developed multi-form mold technology, it enhances the universality and compatibility of molds, reduces mold replacement time and debugging costs, and lowers the coil defect rate caused by mold issues.

In addition, Yeyi also provides customers with comprehensive process management training services, helping enterprise operators master the correct equipment operation methods and process parameter adjustment skills, ensuring that the production process is strictly carried out in accordance with process specifications, effectively avoiding product quality problems caused by human operational errors, and further improving production stability and yield levels.

4. Intelligent detection and data analysis to achieve a quality closed loop

To ensure the quality of coil finished products, Yeyi Automation Technology has introduced intelligent detection equipment and data analysis systems. During the production process, the online detection device conducts real-time monitoring of key parameters such as the number of turns, resistance, and insulation performance of the coil. Once any abnormality is detected, it immediately issues an alarm and automatically stops the machine to prevent the continuous production of defective products. Meanwhile, through real-time collection and analysis of the detection data, the system can quickly locate the root cause of the problem, providing an accurate basis for process optimization and equipment adjustment.

During the finished product inspection stage, Yeyi's high-precision inspection equipment can conduct comprehensive performance tests on coils, including withstand voltage tests, inductance tests, Q value tests, etc., to ensure that every coil leaving the factory meets quality standards. By establishing a quality traceability system, information such as raw material batches, production process parameters, and test data is associated and stored, achieving full life cycle management of product quality. This enables enterprises to promptly identify and solve problems, continuously improving product quality and production yield.

From the strict screening of raw materials to the precise processing with advanced equipment, and then to the optimization of process management and intelligent detection, Yeyi Automation Technology (Suzhou) Co., Ltd. starts from every production link and provides a comprehensive and systematic solution for improving the production yield of coils. With its professional technical capabilities and complete service system, Yeyi Technology is helping an increasing number of enterprises achieve efficient and high-quality coil production, and gain an advantage in the fierce market competition.