Principle of transformer core transformer assembly machine
Hui Yue Technology transformer core assembly machine is the electronic products transformers, high-frequency transformer cores automatic assembly encapsulated functionality. The following principles with you dwell on what transformer transformer core assembly machine. (about the Magnetic core Assemble machine)
The size of the transformer core depends on the output power and temperature rise. Transformer design formula is as follows: P = KfNBSI × 10-6T = hcPc + hWPW
Wherein, P is the electrical power; K is a coefficient related to the waveform; f is the frequency; N is the number of turns; S is the area of the core; B is the magnetic induction work; I is the current; T is temperature; Pc iron loss; PW for copper loss; hc and hW coefficient determined by experiment.
As can be seen from the above equation: high operating magnetic induction B can obtain a large output power or to reduce the volume by weight. However, increasing the value of B is limited by the value of Bs material. The frequency f can be several orders of magnitude, and thus has the potential to significantly reduce the volume and weight. The low core loss can reduce the temperature rise, rise, in turn, affect the frequency of use and the selection of the work of magnetic induction. In general, the switching power supply is the main requirement of the material: high-frequency loss as low as possible, a sufficiently high saturation magnetic induction, high permeability, high enough Curie temperature and good temperature stability, and some use requirements more high squareness ratio, is not sensitive to stress, good stability, low prices. Because single-ended transformer core work in the first quadrant of the hysteresis loop of magnetic material requirements different from said main transformer. It is actually a single side of the pulse transformer, thus requiring a large B = Bm-Br, i.e., the difference between the remanence Br and the magnetic induction of Bm to be large; while requiring high pulse permeability. Especially for single-ended flyback switching the main transformer, or transformer, said energy storage, to consider storage requirements.
The number of energy storage coil is determined by two factors: one is the working value of magnetic induction Bm material or inductance L, and the other is operating magnetic field Hm, or the operating current I, the storage W = 1 / 2LI2. This requires that the material have a sufficiently high Bs value and a suitable permeability, often for a constant width of the permeable material. For work in the transformer between ± Bm, it requires its hysteresis loop area, loop area especially at high frequencies to be small, as well as reduce the load loss, reduced excitation current, should be a high magnetic conductivity, the most suitable for enclosed annular core, its hysteresis loop shown in Figure, this core for dual-end or full-bridge work status of the device.
Core assembly machine reference chart:
