Advantages of triangular three-dimensional coil core

1. Magnetic circuit optimization

(1) There is no joint between the three dimensional coil core layers, the magnetic circuit is evenly distributed everywhere, there is no obvious high resistance area, and there is no distortion of the magnetic flux density at the joint.

(2) The direction of magnetic flux is completely consistent with the crystal orientation of the silicon steel sheet.

(3) The length of the three-phase magnetic circuit is completely equal, and the sum of the length of the three-phase magnetic circuit is the shortest.

(4) The three-phase magnetic circuit is completely symmetrical, and the three-phase no-load current is completely balanced.

2, low loss, power saving effect is significant

(1) The magnetization direction of the three-dimensional coil core is completely consistent with the rolling direction of the silicon steel sheet, and there is no bypass connection between the core layers 槰, the magnetic flux distribution is uniform across the magnetic circuit, and there is no obvious high resistance zone and no distortion of the magnetic flux density at the joint. Under the premise of the same material, compared with the coil core and the laminated core, the iron loss process coefficient is reduced from 1.3-1.5 to about 1.05, and this alone can reduce the core loss by 10-20%.

(2) Due to the special three-dimensional structure, the material amount of the iron yoke part of the core is reduced by 25% compared with the traditional laminated core, and the reduced angular weight accounts for about 6% of the total weight of the core.

(3) The shear treatment of the silicon steel sheet will worsen its magnetic permeability, three-dimensional coil core by high temperature (800℃) vacuum nitrogen annealing treatment, not only eliminate the mechanical stress of the core, but also refine the magnetic domain of the silicon steel sheet, improve the secondary recrystallization capacity of the silicon steel sheet, so that the performance of the silicon steel sheet is much better than its factory performance.

(4) After testing, the no-load loss of the three-dimensional transformer is reduced by 25-35% compared with the national standard, and the no-load current can be reduced by up to 92%.

3, low noise

The source of noise generated by transformer body vibration is:

1) The magnetostriction of the silicon steel sheet causes vibration of the core and produces noise.

2) There is an electromagnetic attraction between the joint of the silicon steel sheet and the laminated sheet due to magnetic leakage, causing vibration of the core and noise.

3) The working magnetic density of the transformer is too high, close to or reach the saturation point, and the magnetic leakage is too large, resulting in noise.

Because the three-dimensional coil core is made of silicon steel sheet and strip material in a special core Winding Machine without interruption and tight continuous winding, there is no seam, and it will not produce noise caused by magnetic discontinuity such as laminated rush. At the same time, the three-phase magnetic circuit and magnetic flux are completely symmetrical, and the working magnetic density is reasonable, so the product noise is greatly reduced.

The type test sound level of SGB10-RL-2000/10 product is only 47dB, which is 19dB lower than the 66dB stipulated by the national standard, and almost reaches the environmentally friendly silent state, which is most suitable for indoor and residential use.

4. Strong overload ability

(1) The heat output of the product itself is very low: the no-load loss and no-load current of the coil core transformer are very small, and the heat output of the product itself is very low;

(2) As shown in the figure, the three-phase coil is arranged in a "product" shape, forming a central natural gas channel through the upper and lower between the coils -" exhaust flue ", due to the temperature difference between the upper and lower iron yoke 30-40℃, resulting in strong air convection, cold air from below to the central channel, heat from the upper iron yoke inner slope radiation out, the natural circulation quickly took away the heat generated by the transformer.

5, compact structure, small footprint

The special three-dimensional core makes the product compact structure and reasonable layout, the body plane occupation area is reduced by 10-15% compared with the traditional product, the body height is reduced by 10-20%, and the box variable volume can be reduced by nearly 1/4 if installed in the box-type substation