Three-dimensional coil core transformer and features

1. Magnetic circuit optimization transformer (1) There is no seam between the three-dimensional magnetic core layers, the magnetic circuit is distributed evenly everywhere, there is no obvious high resistance area, and there is no distortion phenomenon of the magnetic flux density at the joints.
(2) The direction of the magnetic flux is exactly the same as that of the silicon steel plate. (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 load current is completely balanced. , Low loss, significant power-saving effect (1) The direction of magnetization of the three-dimensional coil core is completely consistent with the rolling direction of the silicon steel sheet, and there is no overlap between the core layers, and the magnetic flux distribution is uniform throughout the magnetic circuit. Obvious high-resistance area, no distortion of the magnetic flux density at the joints. Under the premise of the same material, compared with the laminated core, the core loss coefficient of the core is reduced from 1.3-1.5 to about 1.05. Only this one can reduce the core loss by 10-20%.
(2) Due to the special three-dimensional structure, the iron yoke part of the iron core is reduced by 25% compared with the conventional laminated iron core, and the reduced angular weight accounts for about 6% of the total weight of the iron core.
(3) The shear treatment of silicon steel sheet deteriorates its magnetic performance. The three-dimensional three-dimensional core is vacuum-annealed at a high temperature (800°C), which not only eliminates the mechanical stress of the core but also refines the magnetic properties of the silicon steel sheet. The domain improves the secondary recrystallization ability of the silicon steel sheet, so that the performance of the silicon steel sheet is greatly superior to its performance at the time of shipment.
(4) After testing, it is found that the no-load loss of three-dimensional transformers is reduced by 25-35% compared with the national standard, and the maximum no-load current can be reduced by 92%.
3, low noise The noise source of the transformer body vibration is:
- The magnetostriction of the silicon steel sheet causes the iron core to vibrate and generate noise. - Electromagnetic attraction due to magnetic flux leakage exists between the joints of the silicon steel sheet and the laminations, causing the iron core to vibrate and generate noise. - The working magnetic flux density of the transformer is too high , Close to or reach the saturation point, magnetic leakage is too large, resulting in noise Because the three-dimensional three-dimensional coil core is the silicon steel strip material in a dedicated core winding machine uninterrupted, tight continuous roll, without seams, will not produce such as The noise that is caused by the discontinuity of the magnetic circuit in a hurry. At the same time, the three-phase magnetic circuit and magnetic flux are completely symmetric, and the working magnetic density design is reasonable, so the product noise is greatly reduced.
SGB10-RL-2000/10 product type test sound level measurement only 47dB, 66dB than the national standard 66dB reduction of 19dB, almost to environmental protection mute state, the most suitable for indoor and residential use.
4. Strong overload capacity (1) The heat output of the product itself is very low: The no-load loss and no-load current of the wound 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 coils are arranged in a “pink” shape, forming a central natural gas channel running up and down through the coils—“drafting chimney”. Since the temperature difference between the upper and lower iron yokes is 30-40°C, it produces strong Convection of air, cold air from the bottom to the central channel to supplement, heat radiated from the slope of the upper iron yoke out of the natural cycle quickly take away the heat generated by the transformer.
Source; List of transformers