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North test interpretation: power without CCC certification symptoms and hazards

2019-11-24
412 编辑: 北测集团
本文关键词:
3CCCC

1、No symptoms and damage of CCC certification power

    Players buy electronic products, in addition to the performance of the province is also concerned about the value of the security, then the mandatory domesticCCC certificationis an important reference basis. Simply put it is a product of the Chinese government to protect the personal safety of the consumer's personal safety assessment system,Only through the CCC certification power before the regular market circulation, the players should pay attention to.

    Power market dragons and fishes jumbled together,A lotThere is no CCC certification or fake CCC certified products like in the circulation, then such power in the end what harm? I believe I have readtheArticle,You'll have more to know.

     is a lot of players tend to overlook the installed hardware, especially white players often think, can't improve the performance, buy a passable improvise got, this is not desirable. Below we will talk about these no CCC authentication power, analysis of their problems, to give players a reminder to buy power, to buy power should be particularly vigilant.


2、EMI circuit is missing seriously

    General switching power supply CCC certification project is still very much and complex, but for consumer attention and more important one is Mei circuit part, no EMI power supply is generally very difficult through the CCC certification.

    And most of the power without CCC certification is no EMI circuit design.

    EMI circuit of power supply is the use of inductive components and capacitive components of some of the characteristics to filter out the electromagnetic interference in power or electronic engineering. Besides, it is simply a filter for impurities, like a filter.

    Many power supply here are yellow boxes and blue components, respectively, Y, X capacitor, so that the role is the first filter.

    The two stage EMI is often composed of two Y capacitors with a X capacitor,Insurancetube and some differential mode inductors and common mode inductors are composed.. The two types of inductors are better filtering and can resist interference..

    The two levels of EMI filter circuit, to a good filter from the power grid's high-frequency clutter and in-phase interference current. At the same time, electromagnetic radiation generated in the power supply reduced to very low limits, so that the electromagnetic radiation leakage will not cause adverse effects on the human body or other equipment.

Symptoms: EMI circuit deletion

Consequences: the radiation is greater, the current is not pure hardware damage to the serious


3、Component specifications shrink

    Power internal components of the material and power supply performance is closely related, and no power is bound to CCC certification of the power supply is bound to shrink. For example, PFC, PFC is passive and do not discuss, some copycat power PFC is simply a pile of big iron.

    The power supply of the main capacitor specifications and parameters for power is also very key, the main capacitor as a part of the rectification filter, capacity / pressure / temperature and other parameters are particularly important. However, these no CCC authentication power, most of the main capacitor is not qualified.

Mains capacitor 330F

The test shows 193F  the nominal deviation is -41%

    These are no CCC authentication power supply materials shrink part of the author did not mention is far from this, such as power PCB version, welding process, wire, heat, etc.. This has shrunk the material directly consequences players also guess, and that is the performance, we continue to see.

Graphics cards burned

Capacitance explosive slurry

Symptoms: fake PFC, heat sink, welding rough, shrinkage, etc.

Results: the low efficiency, the power stability of the easy bleeding trouble, may damage to other hardware


4、The performance test is no method to see

    In the front just a theoretical description of the hazards of the non CCC certification power, the following we look at the actual performance test. The station was recently purchased a number of cottage power, basically is without a knockoff of CCC certification, measurement results too horrible to look at below to players who demonstrate "achievement", comparing objects is Huntkey genuine 300W passive PFC power supply.

Conversion efficiency contrast

    It is in the power conversion efficiency of contrast, 50, 100, 170 for output power and the general passive PFC power supply gap has been very big, big iron PFC should is "hero".

    This is where a power supply ripple performance and contains three state output 50W/100W/170W, +12V/+5V/+3.3V high-frequency and low-frequency ripple, 12V and + 3.3V now generally, but + 5V output exceeds bid badly, initial value is beyond the norms of the Intel 50 MV nearly doubled, maintain for a long time in more than 120mV standard value of 2 times the level is above.

+12V and +3.3V ripple performance is generally

+5V ripple performance over Intel standard 2 times more

    This for connection on the motherboard USB devices, and + 5V power supply to support the hard disk /SSD/ CD-ROM and other external devices bring the most direct damage, the noise will be more direct test of the above products of life, but also a source of data basically, so players should clear the.

Symptoms: low efficiency, excessive ripple

Harm: more electric, affecting the computer hardware life


5、Pay attention to power to be improved

    TodayEditNetizens to analysis the symptoms and the harm of CCC certification power that God should have a clear picture of, but still have a lot of white players don't understand. Therefore, the author mainly is in order to let more white players understand the truth, not to be unscrupulous businessmen to deceive.

Electricity suppliers selling power Including many non certified products

    These poor qualityCCC certificationPower is able to sell, and even quite popular, in addition to their own technical threshold is relatively low, and the majority of players neglect not unrelated. For a long time players do not attach importance to the power supply, only the value of graphics processor and so on, but if the purchase such non certified power supply products, if the hardware burned but I love, only at the expense of is their. Or that sentence:

Power is very important can not be ignored, no certification products not to buy.

Several major symptoms and damage of CCC free authentication power:

1, EMI circuit missing, resulting in the enhancement of human radiation, while the current is not pure affect the hardware life;

2, components shrink (PFC, main capacitor, heat sink, wire, etc.), directly affect the power supply stability;

3, the internal variety of shrinking lead to low efficiency, excessive ripple. 

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