The influence of the orientation of cold rolled silicon steel iron core of transformer

Orientation of cold rolled silicon steel core effect the performance of the transformer is 2019 - 03 - 30 15:05:12 orientation of cold rolled silicon steel used in power transformer, the main technical requirements are high saturation flux density, low loss, in improving the performance of power transformer with the orientation of cold rolled silicon steel technical progress are: (1) to reduce the thickness of the steel strip and power transformer with orientation of cold rolled silicon steel thickness is from 0. 35 mm reduced to 0. 30mm、0. 27mm、0. 23 mm, individual even reduced to zero. 15mm。 Domestic production of 23 q110 0. 23 mm thick cold rolled silicon steel, saturation flux density is 1. 8 t, in 1. 7 t and unit weight loss under 50 hz P1. 7/50 to 1. 10W/kg。 (2) make the silicon steel strip surface is smooth, not forming magnesium silicate layer, remove the pinning position when magnetized, 180 & deg; Domain wall mobility and magnetized uniformity, and then apply the tension of the coating. After this treatment, 0. 23 mm thick P1 orientation of cold rolled silicon steel consumption. 7/50 drop to zero. Below 7 w/kg. (3) in the silicon steel adding 0. 008-0. 02% of the Bi or Pb, can increase the saturation flux density to 1. 96-1. 98T。 (4) change the annealing process, refine the magnetic domain, can make the orientation of the wastage of the cold rolled silicon steel down 0 again. The wastage of the 23 mm thick P1. 7/50 floor dropped to zero. 55 w/kg, even to zero. 45W/kg。 As you can see, still in thickness of 0. 23 mm, will use the technical improvement measures in recent years, orientation of cold rolled silicon steel strip performance is greatly improved, loss of 40 ~ 50% lower than domestic 23 q110, 20 ~ 35% lower than Japanese 23 zdkh80. Electronic transformer with the orientation of the technical requirement of cold rolled silicon steel, in addition to the longitudinal ( Orientation) High saturation flux density, low loss, but also the characteristics of electronic transformer, such as E plate core, in E rushed in and the length of one 5 and longitudinal orthogonal, transverse magnetic field, therefore also calls for transverse magnetic can be good, but the orientation and orientation, loss is much lower. So in the requirements of high efficiency of power transformer, the orientation of cold rolled silicon steel more and more.