Start by selecting the transformer core
Time：2024-04-16 In recent years, the price of iron core materials and conductive materials used in electronic transformers in power supplies has risen continuously, and upstream raw materials have formed a seller's market. As a downstream electronic transformer power user, you can choose and purchase on a global scale, forming a buyer's market. In the middle of the electronic transformer industry, only by taking the road of technological innovation can we get rid of this dilemma of suffering from both ends. However, in the mature electronic transformer industry, technological innovation is more difficult. But the improvement of every small link can bring new ideas and new products.
Taking the road of technological innovation, we must always remember the purpose to be achieved. The electronic transformer in the power supply, like all products as a commodity to carry out any technological innovation, must complete the specific function under the specific conditions of use, the pursuit of performance-price ratio. The current power supply products are generally characterized by "light, thin, short and small" to miniaturization and portability. Electronic transformers must be adapted to the size and weight requirements of the user's power supply product. At the same time, the price of raw materials for electronic transformers (core materials and conductive materials) has risen. Therefore, how to reduce the volume and weight, how to reduce the cost, has become the main direction of the development of electronic transformers in recent years.
Silicon steel is the core material widely used in electronic transformers in power frequency power supply. To reduce the amount of iron core in the electronic transformer, the working magnetic flux density (working magnetic density) of the silicon steel must be increased. The working magnetic density of silicon steel is determined by the saturation magnetic flux density and the loss. Because efficiency is an important performance indicator of electronic transformers, now, in order to save energy, many power products have put forward standby loss requirements. The core loss of the electronic transformer is the main component of the standby loss, therefore, the efficiency or loss of the electronic transformer is clearly put forward strict requirements.
Since 2008, the price of oriented and non-oriented cold rolled silicon steel has risen, and the coil ring core, compared with the R type, CD type and EI type core, can save more than 20% of the core material cost due to the consumption of less material, and expand the scope of use in electronic transformers. The winding ring core can give full play to the properties of oriented cold rolled silicon steel, and the working magnetic density is much higher than that of non-oriented cold rolled steel. At the same time, unlike R type, CD type and EI type iron cores, silicon steel materials can be fully utilized, there will be no corner waste, and the material utilization rate can reach more than 98%.
