Main heating components in the switching power supply for high frequency transformer power diode semiconductor switch tube filter inductance and different components have different way to control the heat power tube is one of the calorific value larger device in the high frequency switch power supply, reduce its calorific value, not only can improve the reliability of power tube, but also can improve the reliability of switch power supply, improve MTBF (MTBF) of the switch tube heat is caused by the loss, the wastage of the switch tube by the switching process loss and loss of state of two parts, reduce the loss of state can choose low resistance of the switch tube to reduce the loss of state;Switching process loss is caused by the switching time and the size of gate charge, reduce the loss of switch process can choose switch faster recovery time shorter device to reduce but more important is through the design more optimal control method, and buffer technology to reduce the loss, such as the soft switch technology, can greatly reduce the loss of reducing power diode calorific value, the ac rectifier and buffer diode, usually don't have a better control technology to reduce wear and tear, can be reduced by selecting high quality diode loss for rectifier transformer secondary side can choose efficient synchronous rectifier technology to reduce the lossFor loss caused by high-frequency magnetic materials, skin effect should be avoided as far as possible. For the effect caused by skin effect, multiple thin enameled wires can be wound together to solve the problem.
High-frequency power transformer is a power transformer whose working frequency exceeds the intermediate frequency (10kHz). It is mainly used as the high-frequency switching power transformer in the high-frequency switching power supply, as well as the high-frequency inverter power supply transformer in the high-frequency inverter power supply and the high-frequency inverter welding machine. According to the working frequency, it can be divided into several grades: 10kHz ~ 50kHz, 50kHz ~ 100kHz, 100kHz ~ 500kHz, 500kHz ~ 1MHz and above 1MHz. If the transmission power is relatively large, the operating frequency is relatively low; The transmission power is relatively small, the working frequency is relatively high. In this way, there are not only the difference of working frequency, but also the difference of power supply.