Switched-mode power supplies (SMPS) are widely used in modern electronic equipment, providing efficient, reliable and lightweight power conversion. SMPS transformers play a critical role in this process, stepping up or stepping down the input voltage and transferring power from the primary winding to the secondary winding.
The quality of the step-down transformer directly impacts the performance and safety of the electrical system and its components. In this blog, we will discuss the factors to consider when buying a step-down transformer and where to purchase a high-quality one.
Step-down transformers are electrical devices used to lower the voltage of an alternating current (AC) power supply. Choosing the right step-down transformer is key to ensuring that the distribution of power is safe, efficient, and reliable, and it is something that can have a significant impact on the efficiency of an electrical system. If you are contemplating buying a step-down transformer, here are nine things you must take into account.
1.View the surfaces and accessories of SMPS transformers
2.Test the insulation of SMPS transformer
3.Identify and detect the end of each winding with the same name
High-frequency transformer is a power transformer with a working frequency exceeding 10 KHz. It is principally used as a high-frequency switching transformer in a high-frequency switching power supply as well as a high-frequency inverter in a high-frequency inverter welding machine.
The triple-insulated wire is a new high-performance insulated wire that has been developed in the last few years in the world. Wires of this type consist of three layers of insulation, with a core wire in the middle. The first layer of the film is a golden polyamide film, also known as golden film abroad. The thickness of this film is several microns, but it can withstand high voltage pulses of 3kV;
YES, In the same specification, the outer diameter of a triple insulated wire is larger than that of an enameled wire. There is no problem with using triple insulated wire instead of enameled wire as long as the bobbin has enough reserve space. Wires that are triple insulated are frequently used in high-frequency transformers that are subject to safety regulations, as they can produce high current densities and a small creepage distance.
It is not recommended use enameled wire plus sleeve replace triple insulation wire. It is expected that the enameled wire plus sleeve will cost less than the triple insulation wire in terms of material costs, however, the volume of the product, after including the retaining walls and sleeve, will increase considerably.
The reason for this is that the sheet laminated core can reduce another type of iron loss – eddy current loss.
Transformers classified as Class II or Class III are used for circuits classified as Class II or Class III, respectively, according to the National Electrical Code, ANSI/NFPA 70. The main purpose of these connectors is to connect sinusoidal power supplies.
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