Yangzhou Kaihong Power Technology Co., Ltd. (Yangzhou Headquarters)
Sales phone: 0514-87979963
Sales Straight 1: 13773587351
Sales line 2: 18932373905
Sales line 3: 15190420406
Company Fax: 0514-87580922
Sales email: firstname.lastname@example.org
Company address: Xi'an Jiaotong University Pioneer Park, East Wuzhou Road, Yangzhou
High-power DC stabilized power supply filter, which is a passive network structure, is suitable for both AC and DC power supplies, and has bidirectional suppression performance. Inserting it between the AC power grid and the power supply is equivalent to adding a blocking barrier between the two EMI noises. Such a simple passive filter plays a role of bidirectionally suppressing noise, and thus in various electronic Widely used in equipment.
For common-mode interference currents, the magnetic fields generated by the two coils are in the same direction, and the common-mode choke coils show a larger impedance, thereby attenuating the interference signals; while for differential-mode signals (here, low-frequency power supply current ), The magnetic field generated by the two coils cancels, so it does not affect the power transmission function of the circuit.
The power filter is designed for the characteristics of electromagnetic interference at the power port. It is generally a frequency-selective two-port network composed of inductors, capacitors, resistors or ferrite devices. It is actually a kind of filter. According to the working principle, It is a reflective filter.
It can provide high series impedance and low parallel impedance in the filter stopband, which makes it severely mismatch with the impedance and load impedance of the noise source, thereby transmitting unwanted frequency components back to the noise source.
When we choose a power filter, we should mainly consider three indicators: voltage and current, followed by insertion loss, and then the size of the structure.
Since the inside of the filter is generally potted, environmental characteristics are not a major issue. However, the temperature characteristics of all potting materials and filter capacitors have a certain effect on the environmental characteristics of the power filter.
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