Selecting High-Quality Materials to Manufacture Transformers
Transformers change the network voltage through electromagnetic induction, and the main materials are silicon steel sheets and electromagnetic wire. The quality of these two materials directly affects the loss characteristics of the transformer. The loss formed by the transformer core during operation is called no-load loss. The loss value is constant and has little to do with the transformer's load rate, and it is unavoidable. However, the quality of the magnetic material can change the magnitude of the loss. The first generation of energy-saving transformers selected high-quality Q11 and Q10 cold-rolled grain-oriented silicon steel sheets, eliminating hot-rolled D44 and other silicon steel sheets. Combined with improvements in structural design, the no-load torque loss was reduced by 40%.
(2) Optimizing Design and Improving Process
Improving the loss characteristics of transformers by starting with structural design and manufacturing process is a major research topic for manufacturers. The application of electronic computers to transformer design has opened up broad prospects for design work. Under the ideal copper ratio, the design goal is to minimize losses and copper and iron consumption. The curves of high-quality materials and optimized design intersect at one point, thereby obtaining the best effect. The core structure has been changed from the original direct seam to a semi-straight, semi-oblique, and fully oblique seam, which is a breakthrough improvement in structural design. This can mitigate the magnetic conduction direction of the grain-oriented silicon steel sheets in the core seam area and reduce no-load loss.