Double-top bent coil with peeled paint and soldered wire

I. Basic Structure

Conductor: The core is a high-conductivity wire, mostly enameled copper wire (single or multiple strands twisted together). In high-frequency scenarios, silver wire can be selected. The insulating coating on the surface can prevent short circuits in adjacent wires.

Support structure: Some coils are equipped with circular frames (such as plastic, ceramic or ferrite materials) to provide winding support for the wires. There are also hollow circular coils that do not require a frame and maintain a circular shape solely by the insulation and arrangement of the wires themselves.

Lead-out end: The wire extension sections at both ends of the coil, used for connecting the circuit, need to be insulated to ensure safe connection with other components.

Ii. Core Features

Uniform magnetic field distribution: The circular symmetrical structure ensures that when current passes through, the surrounding magnetic field is uniformly distributed in a ring shape. The magnetic field intensity in the central area is stable, and the coupling performance is superior to that of asymmetric coils.

Convenient processing: During winding, the trajectory can be controlled through standardized winding equipment, without the need for complex corner adaptation. The coil shape is regular, and the difficulty of mass production is low.

Flexible space adaptation: The diameter can be adjusted according to requirements, ranging from mini coils within micro-electronic components to large coils in industrial equipment, adapting to different space scenarios.

Iii. Main Uses

Energy transmission and conversion: Such as wireless charging coils (wireless charging for mobile phones and electric vehicles), transformer coils, which utilize uniform magnetic fields to enhance energy transmission efficiency; The coils of electromagnetic induction heating equipment (such as induction cookers) are also mostly circular to ensure uniform heating.

Electronic components and sensors: Used as inductive components for circuit filtering and energy storage; In the field of sensors (such as Hall sensors and magnetic field sensors), circular coils can provide a stable magnetic field and enhance detection accuracy.

Industry and scientific research: such as the coils of large electromagnets, Helmholtz coils used in laboratories (composed of two symmetrical circular coils to generate a uniform magnetic field), used in scenarios such as magnetic field generation and experimental calibration.

Iv. Differences from Coils of Other Shapes

Compared with square and polygonal coils, circular coils have more symmetrical and uniform magnetic fields and higher coupling efficiency. However, there may be a small amount of waste of corner space in square equipment.

The winding process is simpler, does not require corner adaptation, and is suitable for mass production. However, for irregular-shaped coils, custom winding parameters are often needed, resulting in higher processing costs.

The introduction of the double-top bent, bent, de-painted and tinned coil should not include a table. Keep it simple and avoid any prohibited words

Introduction to Double-top bent de-painted and tinned coils

The double-top bent de-enameled and tinned coil is a type of coil that has undergone specific shaping and end treatment. The core process involves "double-top bending" at both ends of the coil after the wire is wound into shape, and then completing the de-enameled and tinned processes. It is suitable for equipment installation and circuit connection requirements and is commonly found in precision electronic components and electrical equipment.

I. Basic Structure and Processing Points

The main body and bending structure: The main body of the coil is mostly wound with enameled copper wire. After forming the basic shape as required, pressure is applied to both ends of the coil through the pressure head module of the dedicated equipment to complete two symmetrical "double top bends". The bending Angle and arc can be set according to the installation space to ensure precise embedding into the equipment's slot or connection position.

Key to end treatment: The insulating varnish on the lead-out wires at both ends of the bent coil needs to be removed. The commonly used method is the molten tin flow immersion - immerse the ends in a molten tin flow at 300℃-500℃ for 10-40 seconds. The high temperature carbonizes the varnish layer, and at the same time, the tin material can wet the wire core, making the varnish removal more thorough without damaging the wire. After the paint is removed, a tin layer naturally adheres to the end, allowing for direct soldering without the need for additional materials.

Ii. Core Features

Strong installation adaptability: The symmetrical structure with double top bends can precisely match the installation points inside the equipment. Compared with direct lead coils, it is easier to fix and reduces displacement caused by vibration. It is especially suitable for compact and precision equipment.

High connection reliability: The contact resistance at the end after paint removal and tin coating is small. When crimping with the terminal block, the adhered tin layer can directly form a firm weld, avoiding false soldering and enhancing the stability of circuit conduction.

Superior processing efficiency: The paint removal and tin application of the molten tin flow can be completed simultaneously without step-by-step processing. Combined with automated bending equipment, it can ensure the forming accuracy and connection quality in batches.

Iii. Main Uses

Small motors and transformers: Used as winding coils, the double-top bent structure is adapted to the stator slots. After tin the ends, it is convenient to connect with the terminal blocks, ensuring the efficiency of electrical energy conversion.

Precision electronic components: such as relays, inductors, etc. The bent design saves internal space, and the tinned ends can be quickly soldered to the PCB board, enhancing the integration of components.

Automation equipment components: In small sensor devices and control modules, their stable installation and connection characteristics can meet the high-frequency operation requirements of the equipment.

Iv. Differences from Ordinary Coils

The forming and connection processing are different: Ordinary coils are mostly straight leads and require additional bending processing. This type of coil comes with double top bends and the ends are pre-de-painted and tinned, eliminating the need for subsequent processing steps.

More precise application scenarios: Ordinary coils have strong versatility, while the double-top bent, de-painted and tinned coil is specially designed for precision scenarios that require precise fixation and reliable connection, with more targeted adaptability.