A way to increase the operating frequency of a switching power supply. Have you heard of it? The key to power miniaturization is the miniaturization of power supply, so the loss of power supply circuit can be reduced as much as possible. When the switching power supply such as the power supply of industrial control equipment is in the switching state, there is an unavoidable switching loss of the switching power supply such as the power supply of industrial control equipment, and the loss increases with the increase of switching frequency. On the other hand, the loss of magnetic and capacitive elements in switching power supplies (e.g., transformers and reactors) increases with frequency.
In the current market, most of the power transistors in the switching power supply such as industrial control equipment power supply are dual-type transistors, and the switching frequency can reach dozens of kHz, while the switching frequency of the switching power supply can reach hundreds of kHz. Use high speed switchgear to increase switching frequency. For power supplies with switching frequencies higher than MHz, a resonant circuit can be used, known as the resonant switching mode. Can greatly increase the switching speed. In principle, the switching loss is zero and the noise is low. This is a way to increase the operating frequency of the switching power supply.
