High-frequency transformer is a power transformer whoseworking frequency exceeds medium frequency (10kHz). It is mainly used as a high-frequency switching powertransformer in high-frequency switching powersupply,and alsoused as a high-frequency inverter power transformer inhigh-frequency inverter power supply and high-frequencyinverter welding machie.According to the working frequency, it can be divided into several grades: 10Khz-50khz, 50Khz-100khz, 100kHz ~ 500kHz, 500kHz ~ 1MHz, 10MHandabove.
High frequency transformerIntroduction High frequency transformer is the main part of switchingpower supply. There are many topologies in switching powersupply. For example, in the half-bridge power conversion circuit, the two switching triodes turn on in turntogenerate 100kHzhigh-frequency pulse wave, and then the voltage is changed through the high-frequency transformer to output alternatingcurrent. Theproportion of turns of each winding coil of the high-frequency transformer determines the output voltage. A typical half bridge type transformer circuit in the most conspicuous isthree high frequency transformer, the main transformer,transformer and auxiliary transformer (standby transformer),each transformerin the regulations of the state has its own measure, such as maintransformer, as long as it is more than200 w power supply, its corediameter (level) shall not beless than 35 mm. The auxiliary transformer, when the powersupply power is not more than 300W, its core diameter of16mm is enough.