source:Industry News Popular:adapter release time:2021-07-27 10:51:45 Article author:sznbone
According to the elements of electromagnetic compatibility, solving the electromagnetic compatibility of the power adapter can start from three aspects:
1, reduce the interference signal generated by the interference source
2, cut off the propagation path of the interference signal
3. Enhance the anti-interference ability of the interfered body
The external interference to the power adapter, such as power line harmonic current, power line conduction interference, electromagnetic field radiation interference, etc., can only be solved by reducing interference. On the one hand, it can enhance the design of the input/output filter circuit, improve the performance of the active power factor compensation (APFC) circuit, reduce the voltage and current rate of change of the switch tube, rectifier, and freewheeling diode, and adopt various soft switching circuit extensions. Repair structure and control methods, etc.; on the other hand, strengthen the shielding effect of the case, improve the leakage of the gap of the case, and conduct a good grounding treatment.
For external anti-interference capabilities, such as surges and lightning strikes, the lightning protection capabilities of AC input and DC output ports should be optimized. Lightning strikes can be solved by a combination of zinc oxide varistors and gas discharge tubes. For electrostatic discharge, use TVS tubes and corresponding grounding protection, increase the distance between large and small signal circuits and the chassis, or select devices with anti-static interference. To reduce the internal interference of the power adapter, you should start with the following aspects: pay attention to the single-point grounding of the digital circuit and the analog circuit, the single-point grounding of the large current circuit and the small current circuit, especially the current and voltage sampling circuit, to reduce common resistance interference, Reduce the influence of the ground ring; pay attention to the distance between adjacent lines and the nature of the signal when wiring to avoid crosstalk; reduce the impedance of the ground line; reduce the high-voltage and large-current lines, especially the primary side of the transformer, the switch tube, and the power supply filter capacitor circuit. The area enclosed; reduce the area enclosed by the output rectifier circuit and the freewheeling diode circuit and the DC filter circuit; reduce the leakage inductance of the transformer and the distributed capacitance of the filter capacitor; use a filter capacitor with a high resonance frequency.
In terms of transmission, appropriately increase TUS with high anti-interference ability, high-frequency capacitors, ferrite beads and other components to improve the anti-interference ability of small-signal circuits; small-signal circuits closer to the chassis should be Add appropriate insulation and withstand voltage treatment, etc.; the radiator of the power device and the electromagnetic shielding layer of the main transformer should be properly grounded; the large-area grounding between the control units should be shielded with a grounding plate; on the rectifier rack, it should be considered between the rectifiers. Electromagnetic coupling, ground wire layout of the whole machine, etc., to improve the stability of the internal work of the power adapter.
Read recommendations:
EI-48 ADAPTER LINEAR ADAPTOR Switching Power Adapter INTERCHANGEABLE ADAPTOR Linear Adapter
MKS-1202000-36 Switching Power Supply
12W CAR CHARGER,12W USB CAR CHARGER,CAR CHARGER,12W CHARGER
Do you really understand mobile phone fast charging?
What should I do if the power adapter will get hot when summer is here?
Popular recommended products
200-500W Switching Power Supply
2020-08-2924-65W Switching Power Supply
2020-08-2912V2ASwitching Power Supply
2020-08-28MKD-571202000 ADAPTER AC ADAPTER CE ADAPTOR UL ADAPTOR Linear Adapter
2020-08-28MKA-571652420 ADAPTER AC ADAPTER CE ADAPTOR UL ADAPTOR Linear Adapter
2020-08-28EI-66 ADAPTER LINEAR ADAPTOR SWITCHING ADAPTOR Linear Power Adapter Linear Adapter
2020-08-28EI-57 ADAPTER LINEAR ADAPTOR Linear Power Adapter Switching Power Adapter INTERCHANGEABLE ADAPTOR Li
2020-08-28EI-48 ADAPTER LINEAR ADAPTOR Switching Power Adapter INTERCHANGEABLE ADAPTOR Linear Adapter
2020-08-28EI-41 ADAPTER AC ADAPTER LINEAR ADAPTOR SWITCHING ADAPTOR Linear Adapter
2020-08-28EI-35 ADAPTER AC ADAPTER SWITCHING ADAPTOR Linear Power Adapter Linear Adapter
2020-08-28ER42 High Frequency Transformer
2020-08-2712-36W POE POWER SUPPLY
2020-08-27Transformer,Power Transformer,Ring Power Transformer
2020-08-27Transformer,High Frequency Transformer,Frequency Transformer
2020-08-2712-24W Medical Switching Power Supply
2020-08-273-12W Medical Switching Power Supply 3W Switching Power Supply 12W Power Supply
2020-08-2745W PD Charger,45W Charger,PD Charger
2020-08-2736-90W Charger,36W Charger,90W Charger,40W Charger,50W Charger
2020-08-2724W USB Charger,24W Charger,USB Charger
2020-08-2724W 2USB Charger,24W Charger ,2USB Charger
2020-08-2710-24W Charger,24W Charger,10W Charger
2020-08-2730-500W LED Power Supply 30-500W Power Supply
2020-08-27Related Information
What are the unique advantages of high frequency switching power adapter
2022-04-20General Mechanism Analysis of Switching Power Adapter.ac power adapter wholesaler
2022-04-19Suppression method of low frequency ripple of switching power supply
2022-04-16Why is the power adapter making noise?
2022-04-15When the power adapter is in normal use, what is the normal temperature?
2022-04-1490% of people use the car charger incorrectly, are you using it right?CAR POWER SUPPLY sales
2022-04-13The difference between a power adapter and a voltage regulator
2022-04-12Select the power adapter to determine these three adaptation conditions.SWITCHING POWER Vendor
2022-04-11Why is the original power adapter better than the non-original one?TRANSFORMER Production
2022-04-09What are the industries where the power adapter can be applied?CAR CHARGER wholesale
2022-04-08What is the difference between high-end and low-end power adapters? How to check after playing,CAR P
2022-04-07How to design a good power adapter,CAR CHARGER wholesaler
2022-04-07Customized desktop power adapter
2022-04-06The quality of the switching power supply determines the safety of electricity use,CAR CHARGER whole
2022-04-02What are the advantages of wireless chargers?
2022-03-30PD charger is a must-have at home
2022-03-29What are the main materials of the power adapter shell?
2022-03-26What is a PD power adapter? It can make charging ubiquitous
2022-03-25Slow charging? Try a fast charger
2022-03-24Do you understand the cause of abnormal noise in the power adapter?
2022-03-23Reasons for abnormal noise of the power adapter
2022-03-22Talking about the common problems of the power adapter
2022-03-19General manufacturer power adapter reliability test items
2022-03-18More energy efficient and safe power adapter
2022-03-17Five ways to solve the power adapter overheating?
2022-03-16What are the common connection faults of cottage shared chargers on the market?
2022-03-15How to use the car charger and matters needing attention!
2022-03-14Do you know the difference between a power adapter and a charger,CAR CHARGER Processor
2022-03-12The power adapter has a very wide range of applications,Audio Transformer
2022-03-11What is the development trend of the power adapter industry,AC ADAPTER
2022-03-10Popular recommended products
500W Charger,Charger
2020-08-28EI Power Transformer Power Transformer
2020-08-2736-90W Charger,36W Charger,90W Charger,40W Charger,50W Charger
2020-08-2724V21A LED Power Supply 24V Power Supply 21A Power Supply
2020-08-273-12W Medical Switching Power Supply 3W Switching Power Supply 12W Power Supply
2020-08-2710-24W Charger,24W Charger,10W Charger
2020-08-27MKS-120200EU-36 Switching Power Supply
2020-08-2960W 6USB Charger,60W Charger,6USB Charger,Charger
2020-08-2740W 4USB Charger,40W Charger,4USB Charger
2020-08-27Inductance & Coil
2020-08-27MKS-1203000EX Switching Power Supply
2020-08-2930-500W LED Power Supply 30-500W Power Supply
2020-08-2736-65W Switching Power Supply
2020-08-293-100W PCBA power supply 3-100W Customized power supply 3-100W power supply
2020-08-2724W USB Charger,24W Charger,USB Charger
2020-08-27EI-28 AC ADAPTER LINEAR ADAPTOR Linear Power Adapter Switching Power Adapter Linear Adapter
2020-08-2812W POWER SUPPLY,12W CAR POWER SUPPLY,POWER SUPPLY,CAR POWER SUPPLY
2020-08-2712W CAR CHARGER,12W USB CAR CHARGER,CAR CHARGER,12W CHARGER
2020-08-2719V2A 36W Switching Power Supply
2020-08-2824W 2USB Charger,24W Charger ,2USB Charger
2020-08-2712-36W POE POWER SUPPLY
2020-08-2724-65W Switching Power Supply
2020-08-29Transformer,Power Transformer,Ring Power Transformer
2020-08-2730W PD Charger,30W Charger,PD Charger
2020-08-2718-25W Switching Power Supply
2020-08-28EI-57 ADAPTER LINEAR ADAPTOR Linear Power Adapter Switching Power Adapter INTERCHANGEABLE ADAPTOR Li
2020-08-28Transformer,High Frequency Transformer,Frequency Transformer
2020-08-27MKS-1202000-36 Switching Power Supply
2020-08-29EI-35 ADAPTER AC ADAPTER SWITCHING ADAPTOR Linear Power Adapter Linear Adapter
2020-08-2812VDC8A 96W power supply
2020-08-28