Common-mode inductances in switching PSUs?
Common mode inductor is essential a a dvosmjerni filter: on the one hand, to filter out common mode electromagnetic interference on the signal line, on the other hand, to inhibit itself from sending out electromagnetic interference, to avoid affecting the normal operation of other electronic equipment in the same electromagnetic environment.
Common mode choke can transmit diferencijal mode signali, DC and very low-frekvencija diferencija diferencijal mode signali can be passed, while for high-frequency common-mode noise presents a large impedance, so it can be used to inhibit common-mode current harassment.
Common Mode induktori Prebacivanje Napajanje Pomagala?
Common mode inductor is sometimes called common mode choke, because it plays a role in inhibiting, more used in switching power supply circuits, constituting a variety of filters for EMI filtering, inhibit a variety of high-speed signals generated by electromagnetic waves emitted to the outside, the following chart, the circuit has a set of parallel lines, the normal signal through the basic unaffected, but when there is a common-mode current flow through, due to the isotropy of the common-mode current will be generated inside the coil isotropic magnetic field, which is the same direction. When there is a common mode current flowing through, due to the isotropic nature of the common mode current, it will generate a homogeneous magnetic field in the coil and increase the inductive resistance of the coil, which will make the coil behave as a high impedance and produce a strong damping effect, and then the common mode current will be attenuated, so as to achieve the purpose of suppressing the interference.
