Do you know which electrical appliances in daily life use R-type power transformers?

In our daily life, electrical appliances that we can see everywhere use R-type power transformers, ranging from mobile phone chargers, televisions, air conditioners, rice cookers, etc. to elevators, automation equipment, factory machine tools, medical equipment, mining equipment, etc. However, the transformers they use are different depending on the electrical equipment. The voltage used by general household appliances is a low-voltage DC power supply, which usually requires a power transformer 220v to convert AC mains power into low-voltage AC power through diode rectification and capacitor filtering to form a DC power supply. Let's take a closer look at what different power transformers are used for voltage transformation in small household appliances and large equipment?

R type power transformer

Generally speaking, household appliances are relatively small in size, and they are usually satisfied by using high-frequency power transformers. What is the difference between a high-frequency transformer and an ordinary transformer? Under the same power, the higher the operating frequency, the smaller the core cross-section and the smaller the number of winding turns. However, the operating frequency of a high-frequency transformer is usually tens of kHz, so the transformer can be made very small and can also meet the use of most household appliances.

Ordinary low-frequency transformers are usually directly connected to the mains 220V, and their operating frequency is usually 50-60Hz. They are large in size and made of iron core and linear winding inside. Therefore, their size and weight are larger and heavier than high-frequency transformers. Therefore, their application scenarios are usually used for slightly larger equipment, such as factory equipment and some instruments and equipment.

What are the advantages of high-frequency transformers and low-frequency transformers? Although low-frequency transformers are large and relatively heavy, through continuous updating of design processes, the efficiency of R-type low-frequency transformers has been greatly improved, and the efficiency can reach more than 98%. The waveform of low-frequency transformers is not distorted, the circuit is simple, and the failure rate is much lower. Although high-frequency transformers are small, light, and efficient, they are distorted when restored to sine waves, the circuit is complex, and the failure frequency is high. In general, they all have their own advantages. Although technology is constantly innovating, no one can completely replace the other and play their own advantages in their respective fields.