According to the specific main use of power transformer and its specification to carry out classification, with a variety of classification methods. First, according to the driver method of power transformer classification, power transformer can be divided into other excitation type, self-encouraging type two. According to the input/output type of switching power supply, it can be divided into AC /DC converter and DC/DC converter. In order to complete the accurate control of the power transformer, according to the operation method and its main use is not the same, the power transformer can be divided into PFM hybrid teaching, PWM pulse width deployment of these. The power transformer can be divided into series resonant type power transformer and non-series resonant type power transformer.
The application of high frequency switching power supply can realize the conversion of AC power supply and meet the power supply requirements of electrical equipment. When the high frequency switching power supply is running, the current passes through the inverter circuit of the high power switching element to carry on the low voltage conversion, and finally forms the stable output voltage. In general, modern high-frequency switching power supply has the obvious characteristics of light weight and small volume. High frequency switching power supply in use do not need to use power frequency transformer, high frequency switching power supply quality and volume than other switching power supply light, small, easy to install and use. The size and weight of the HIGH-FREQUENCY switching power supply is less than half of other switching power supply, but the high-frequency switching power supply has a large power coefficient, and the silicon guide Angle can be used to control the actual power of the phase change rectifier. The change of load of HIGH frequency switching power supply also affects the change of power coefficient. When the load change is small, the corresponding coefficient will be smaller. In addition, low noise of high-frequency switching power supply is also a feature . The noise of high-frequency switching power supply in operation is less than 50dB. In contrast, the noise during operation of high-frequency switching power supply is reduced by more than 35% compared with the noise during operation of control rectifier equipment. Moreover, the high frequency switching power supply has low energy consumption at the moment of switching, which is conducive to energy saving and emission reduction, and can effectively improve the operation efficiency of the whole machine.
The application of power electronics technology in switching power supply can improve the operation efficiency of switching power supply, make switching power supply more intelligent, efficient, energy saving. With the development of science and technology, the application scope of power electronic technology will be expanded and the application field will be deepened. The research and development of high frequency power transformers not only means the technical improvement of electronic components in China's power engineering, but also means that the technology of power transformers industry in China has already moved to maturity. In the future, high-frequency intelligent switching power supply will become the main development direction of power electronics technology in the field of switching power supply, and power electronics technology will achieve a technological breakthrough in the field of switching power supply.