How to wire the high frequency transformer?

High-frequency transformer is a special kind of transformer, which is mainly used in high-frequency electronic circuits. Different from ordinary transformers, the operating frequency of high-frequency transformers usually ranges from tens of kilohertz to hundreds of megahertz. At such high frequencies, conventional transformers cannot function properly. Therefore, the production and use of high-frequency transformers are more complicated than traditional transformers.

High frequency transformers usually consist of two or more windings and an iron core. One of the windings is called the primary winding and the other or more windings are called the secondary windings. The primary winding usually consists of a smaller number of turns, while the secondary winding consists of a larger number of turns. In operation, the primary winding is usually connected to the power source, while the secondary winding is connected to the load. There are several aspects that need to be paid attention to when wiring.

1. Determine the polarity of the windings

Before assembly and wiring, we need to determine the polarity of each winding. Since the currents in high frequency transformers are alternating, they are constantly changing. Since the voltage of the secondary winding is caused by the primary winding, the polarity relationship between the windings is very important. If the polarity is wrong, the resistor and winding will heat up and possibly burn out. Therefore, before wiring, we must carefully check the polarity of the windings and ensure correct connections.

2. Grounding

Circuits in high-frequency transformers usually require ground wires. Because electromagnetic interference can occur in high-frequency circuits, "barren ground" techniques are needed to suppress these interferences. In barren ground technology, each circuit block has its own ground, and these grounds are typically not connected to ground on the circuit board. Instead, they are connected to a common "quiet ground" point, which is connected to the power ground wire. High-frequency transformers usually consist of two or more windings, with one winding connected to the ground of the power supply and the other winding connected to the quiet ground. This ensures that any noise generated by the transformer is concentrated on the quiet ground and does not interfere with the circuit.

3. Insulation

Since high-frequency transformers operate in the high-frequency range, their insulation is very important. Without proper insulation between windings, high voltage can pass through the gap between the windings and core and possibly breakdown the transformer. To avoid this, proper cable selection is required. More importantly, the windings should be covered with appropriate insulating material to ensure that the windings have no electrical contact with each other.

In short, the wiring of high-frequency transformers is much more complicated than that of ordinary transformers. Proper connections not only help ensure proper operation of the transformer but also help eliminate interference and noise. Therefore, before wiring, we must carefully check the polarity, grounding and insulation of the transformer, and select appropriate cables and insulation materials.