An electromagnetic heater is a device that uses the principle of electromagnetic induction to convert electrical energy into thermal energy. When the current in the coil passes through, it creates an alternating magnetic field. When conductive materials (such as metal) are placed near the coil, the magnetic field will induce eddy currents in the conductor. Eddy currents form a loop current circuit in the conductor, causing energy loss due to the resistance of the eddy currents, thereby converting electrical energy into thermal energy.

The manufacturing method and technical points of electromagnetic heating coils:

1. Determine design parameters: Determine the design parameters of the heating coil, including heating load, size and shape of the heating area, working temperature range, etc. These parameters will guide the design and manufacturing process of the coil.

2. Material selection: Select appropriate conductive and insulating materials based on heating needs and working environment. Commonly used conductive materials include copper, aluminum, nickel based alloys, etc., while insulation materials can choose from polyimide, polytetrafluoroethylene, etc.

3. Draw coil drawings: Based on design parameters and the shape of the heating area, use computer-aided design (CAD) software or manually draw coil drawings. The drawing should include the geometric shape, number of turns, size, and winding method of the coil.

4. Preparation of wire: Calculate the number of turns and size on the coil drawing to prepare the wire. The length and cross-sectional area of the wire should be determined based on current and resistance to meet heating needs.

5. Winding coil: Use a winding machine or manual method to wind the wire according to the design requirements on the drawing. According to the shape and size of the coil, spiral winding, circular winding, or other special winding methods can be selected.

6. Insulation treatment: During the winding process of the coil, insulation materials are used to insulate the wires as needed. This can ensure insulation performance between wires and between wires and surrounding components.

7. Connection wire processing: According to the design of the coil, the connection wire can be connected through welding, socket connection, or other methods. Ensure the reliability and conductivity of the connecting wire.

8. Testing and adjustment: After completing the coil production, conduct testing and adjustment. Ensure that the performance and quality of the coil meet the requirements through methods such as resistance testing, insulation testing, and heating testing.

It should be noted that the production of electromagnetic heating coils can be adjusted and improved according to specific needs and conditions. For larger or complex coil production, professional equipment and technical support may be required. It is recommended to consult a professional manufacturer or engineer when making electromagnetic heating coils to ensure that the production process and results of the coils meet practical needs and provide efficient and reliable heating effects.