Welcome to website of Boluo County Jiazhi (Jiashengyuan) Electronics Co., Ltd.!
0752-6768788 6768755
0752-9768799
LJY@jse.com.cn
NEWS

NEWS

Check category

CONTACT US

Add:Opposite Guanghui Gas Station, Jiewo Village, Longxi Street, Boluo County, Huizhou City
Tel:0752 - 6768788
Fax:0752 - 6768799
E-mail:LJY@jse.com.cn

xuxuegu@jse.com.cn

Your location:
Homepage
/
/
Design principles and design principles of high frequency transformers

Design principles and design principles of high frequency transformers

  • Categories:Company News
  • Author:
  • Origin:
  • Time of issue:2020-08-31
  • Views:0

Design principles and design principles of high frequency transformers

  Design principle of high frequency transformer

  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.

  The leakage inductance of the primary coil-the leakage inductance of the transformer is caused by the incomplete coupling of the magnetic flux between the primary coil and the secondary coil, layer to layer, and turn to turn.

  Distributed capacitance-the capacitance formed between the turns of the transformer winding, between the upper and lower layers of the same winding, between different windings, and between the winding and the shielding layer is called distributed capacitance.

  Primary winding-the primary winding should be placed in the innermost layer, so that the wire length for each turn of the transformer primary winding can be the shortest, so that the entire winding wire is the least, which effectively reduces the distribution of the primary winding itself capacitance.

  Secondary winding-After winding the primary winding, add (3 ~ 5) layers of insulating pads and then wind the secondary winding. In this way, the capacitance of the distributed capacitance between the primary winding and the secondary winding can be reduced, and the insulation strength between the primary and the secondary can be increased, which meets the requirements of insulation withstand voltage.

  Bias winding----whether the bias winding is wound between the primary and the secondary or the outermost layer depends on whether the switching power supply is adjusted according to the secondary voltage or the primary voltage.

 

Professional transformer, inductor manufacturer

CONTACT US

Add:Opposite Guanghui Gas Station, Jiewo Village, Longxi Street, Boluo County, Huizhou City

NEWS

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
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.

MESSAGES

Username used for comment:
客户留言
Description:
验证码图片

Copyright @ 2020 BO LUO XIAN JIA ZHI ELECTRONICS CO.,LTD 粤ICP备20064393号 Powered by www.300.cn