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08-31

Preliminary study on high frequency transformer, introduction to transformer principle

As the name implies, a transformer is an electronic power instrument that changes voltage. It is a device that uses the principle of Faraday electromagnetic induction to change the AC voltage, and is mainly composed of a primary coil, an iron core, and a secondary coil. It can realize the matching conversion of input and output current, voltage and impedance, and can also realize the physical isolation of primary and secondary. According to different primary and secondary voltages, it can be divided into step-down transformer, step-up transformer, isolation transformer, etc.
Preliminary study on high frequency transformer, introduction to transformer principle
08-31

Design principles and design principles of high frequency transformers

When designing high-frequency transformers, the leakage inductance and distributed capacitance of the transformer must be minimized, because the high-frequency transformer in the switching power supply transmits a high-frequency pulse square wave signal. In the transient process of transmission, leakage inductance and distributed capacitance will cause surge currents and peak voltages, as well as top oscillations, resulting in increased losses. Usually the leakage inductance of the transformer is controlled to be 1% to 3% of the primary inductance.
Design principles and design principles of high frequency transformers
08-03

Can switching power supplies replace low frequency transformers?

Switching power supplies and transformers have a wide range of uses, and they also have different differences, both in function and use. Simply put, a transformer is an electronic component on a circuit, while a switching power supply is A circuit composed of multiple electronic components that can realize the corresponding electric energy conversion. Their differences can be distinguished from function and purpose.
Can switching power supplies replace low frequency transformers?
08-03

Briefly describe what the power transformer does!

Intelligent manufacturing companies generally choose electric power engineering as electric energy, and the electric power engineering from the power station must be able to reach the electricity consumption area through long-distance transmission. When the transmitted output power moves at a constant speed, the higher the transmission working voltage, the smaller the amount of current required. Because the current is proportional to the amount of current. So what is the role of the power transformer?
Briefly describe what the power transformer does!
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What is a power frequency transformer? What is the difference between a power frequency transformer and an ordinary transformer
What is a power frequency transformer? What is the difference between a power frequency transformer and an ordinary transformer
What is a power frequency transformer? What is the difference between a power frequency transformer and an ordinary transformer
Power frequency transformers are also called low frequency transformers to show that they are different from high frequency transformers used in switching power supplies. Power frequency transformers have been used in large quantities in traditional power supplies in the past, and the stability of these power supplies uses linear adjustment, so those traditional The power supply is also called a linear power supply. The power frequency generally refers to the frequency of the mains electricity, which is 50Hz in our country and 60Hz in other countries. The transformer that can change the voltage of the alternating current at this frequency is called a power frequency transformer.
See more information
Power frequency transformers are also called low frequency transformers to show that they are different from high frequency transformers used in switching power supplies. Power frequency transformers have been used in large quantities in traditional power supplies in the past, and the stability of these power supplies uses linear adjustment, so those traditional The power supply is also called a linear power supply. The power frequency generally refers to the frequency of the mains electricity, which is 50Hz in our country and 60Hz in other countries. The transformer that can change the voltage of the alternating current at this frequency is called a power frequency transformer.
The role of high frequency transformer_where is the high frequency transformer used
The role of high frequency transformer_where is the high frequency transformer used
The role of high frequency transformer_where is the high frequency transformer used
Now, switching power supplies generally use half-bridge power conversion circuits, which contain high-frequency transformers and transistors. When the circuit is working, the transistors are turned on in turn to generate high-frequency pulses with a frequency of 100KH, which are worthy of high-frequency pulses. Then they are stepped down by a high-frequency transformer, and finally the alternating current with a lower voltage is output. The specific voltage value is determined by each winding coil in the high-frequency transformer. The turns ratio is determined. Generally, three transformers are used, which are called the main transformer, the drive transformer and the auxiliary transformer. Each transformer has its own measurement specifications and functions, so one is indispensable.
See more information
Now, switching power supplies generally use half-bridge power conversion circuits, which contain high-frequency transformers and transistors. When the circuit is working, the transistors are turned on in turn to generate high-frequency pulses with a frequency of 100KH, which are worthy of high-frequency pulses. Then they are stepped down by a high-frequency transformer, and finally the alternating current with a lower voltage is output. The specific voltage value is determined by each winding coil in the high-frequency transformer. The turns ratio is determined. Generally, three transformers are used, which are called the main transformer, the drive transformer and the auxiliary transformer. Each transformer has its own measurement specifications and functions, so one is indispensable.

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