Застосування of common mode inductance in regulated power supply?
The common-mode inductor is essentially a two-way filter: on the one hand, it must filter out the common-mode electromagnetic interference on the signal line, and on the other hand, it must restrain self from emitting electromagnetic interference to avoid affecting the normal operation of other electronic devices in the the same electromagnetic environment. . �% 80�
Common mode choke coils can transmit differential mode signals, both DC and low frequency differential mode signals can pass through, and present a large impedance to high frequency common mode noise, so it can be used to suppress common mode current disturbances.
Застосування of common mode inductor in switching power supply?
Common-mode індуктори are іноді called common-mode choke coils, тому що їхня функція is to suppress, and they are переважно використовується in switching power supply circuits to form various filters EMI and suppress electromagnetic waves generated by various speed signals from going outward. Передача, as shown in the figure below, there is a group of parallel lines in the circuit, and the normal signal is is basly untouched when passing through, but when there is a common mode current flowing through, due to the isotropy of the common mode current, a magnetic field in the same direction will be generated in the coil. Increase the inducive reactance of the coil to to make the the котушка експонат високий імпеданс і продукція a сильний демпфіруючий ефект. at this time, the common mode current will be attenuated to achieve the purpose of suppressing interference.
1. Схема схема сигнал проходження через загальний режим індуктор
The схема схема of the front stage of the switching power supply, in which L1 is the common mode inductor. in order to suppress the common mode interference, we know that the common mode signal is a signal with equal amplitude and the same phase. for ground noise, if we understand the common mode noise, we will know the common mode inductor and why the common mode inductor and why the common mode inductor is connected to AC сторона.
