380V To 220V EI14 Step Down Transformer For Audio Equipment AC To DC 12V 24V 48V

1.Product Description

The EI14 Step Down Transformer is a specialized electrical device designed for the purpose of reducing voltage levels in electrical circuits. With its EI14 core structure, typically made from high-quality magnetic materials such as silicon steel, it provides an efficient magnetic path that minimizes magnetic losses and ensures reliable performance. The compact size of the EI14 core makes this transformer suitable for applications where space is at a premium, allowing it to be easily integrated into various electronic devices and systems.

As a step-down transformer, its primary function is to convert a higher input voltage on the primary winding into a lower output voltage on the secondary winding. This is achieved through the principle of electromagnetic induction, where the changing magnetic field in the core induced by the current in the primary winding generates a corresponding voltage in the secondary winding. The specific turns ratio between the primary and secondary windings determines the extent of the voltage reduction.

The EI14 Step Down Transformer can be used in a wide range of applications. In electronic equipment like power supplies for small appliances, it helps to safely step down the mains voltage to a level that is suitable for the internal components of the device. It can also be employed in audio systems to adjust voltage levels for different components, ensuring proper operation and protection of sensitive audio equipment. Additionally, in some industrial control systems, it plays a crucial role in providing the appropriate voltage supply for various control circuits.

Constructed with durability in mind, this transformer is built to withstand normal operating conditions, including temperature variations and electrical fluctuations. Its reliable performance makes it a trusted choice for both professional engineers and DIY enthusiasts who require a stable and efficient step-down solution for their electrical projects. Overall, the EI14 Step Down Transformer is a valuable component that combines compactness, efficiency, and reliability to meet the voltage conversion needs of diverse electrical applications.

2.Workmanship

The manufacturing process of EI14 Step Down Transformer generally includes the following steps:
1. Iron core production
Material selection: High permeability silicon steel sheets and other magnetic materials are selected to ensure good magnetic conductivity and reduce hysteresis and eddy current losses.
Punching: Silicon steel sheets are punched and cut into EI14 shaped iron chips using punching machines and other equipment. The punching process must ensure dimensional accuracy and edge quality to avoid problems such as burrs and deformation that may affect performance.
Stacking: The punched iron chips are stacked in a certain order and manner, usually using a staggered stacking method to make the magnetic circuit smoother and reduce magnetic resistance. When laminating, it is necessary to control the tightness and verticality of the laminations to ensure the overall performance of the iron core.

2. Winding production
Wire diameter selection: Select the appropriate enameled wire diameter based on parameters such as power, voltage, and current of the transformer. Generally, the primary winding has a relatively thin wire diameter, while the secondary winding selects the appropriate wire diameter based on the output current to meet the current carrying capacity and resistance requirements.
Winding: Use a winding machine to wind enameled wire onto the skeleton of the iron core. During the winding process, attention should be paid to the direction, number of turns, and tightness of the winding. Accurately control the number of turns of the primary and secondary windings according to the design requirements, ensuring that the turns ratio meets the requirements of voltage conversion. The winding should be tight and neat, avoiding problems such as looseness and crossing, and preventing short circuits and poor insulation.
Insulation treatment: After the winding is completed, the winding is insulated. Generally, insulation paint immersion or spraying methods are used to improve the insulation performance of windings and prevent leakage between windings and between windings and iron cores. After insulation treatment, it is necessary to dry and solidify the insulation paint to fully dry and form a good insulation layer.

3. Assembly
Core insertion: Insert the skeleton of the wound winding onto the E-shaped part of the EI type core, then insert the I-shaped core and combine it with the E-shaped core to form a complete core structure. Be careful during the insertion process to avoid damaging the winding and core.
Fixing and packaging: Use glue, tape, or other fixing materials to secure the iron core and winding together, ensuring that they do not loosen during use. For some transformers that require higher levels of protection, they will also undergo encapsulation treatment, using epoxy resin and other encapsulation materials to encapsulate the transformer as a whole, improving its moisture resistance, dust resistance, and seismic resistance.

4. Testing and debugging
Appearance inspection: Check the appearance of the transformer for cleanliness, obvious damage, deformation, and damaged enameled wires.
Electrical performance testing: Testing various electrical performance indicators of transformers, such as transformation ratio, no-load current, no-load loss, load loss, insulation resistance, withstand voltage performance, etc., to ensure that they meet design requirements and relevant standards.
Debugging: Based on the test results, perform necessary debugging and adjustments on the transformer. By adjusting the number of winding turns, iron core air gap, and other methods, the performance of the transformer can be optimized to achieve its optimal working state.

Shenzhen Zhixiangyuan Electronics Co.,Ltd is a high tech enterprise, specializing in customizing various types of audio transformers, high frequency transformers, low frequency transformers，switching power transformers, toroidal inductors, choke coils, SMD power inductors, supper high current inductors and wireless charging coils ,etc for customers.

Founded in 2011,our factory have two production bases in Huizhou city,Guangdong province and Guang’an city,Sichuan province which can produce 120 million inductors and transformers that meet the environmental Protection requirements of ISO every year. Our company equips with fully automatic winding,soldering,assembling,testing machines,also some reliability test equipments.

Our products are certified by UL，FCC，CE，RoHS、Reach and granted with 20 patents.These achievements mainly come from our strong R and D team,providing solutions for temperature decreasing noise cancellation and coupled radiation conductivity.

The products are widely used in high quality audio equipments, audio conference room equipments，communication, medical electronic equipments, automotive electronics, sports and fitness equipments, beauty equipments，LED lighting，and consumer electronics etc.

We are committed to providing high quality coils, inductors, transformers and other products. We can also accept OEM and ODM orders. We sincerely welcome customers at domestic and oversea to visit and cooperate with us with high-quality products, preferential prices and excellent reputation.