What is the significance of 80plus certified power supply in 2020?

In the field of power supply equipment, especially in the field of PC power supply equipment, after years of publicity from manufacturers, 80plus certification has become an important standard for you to purchase power supply. < / P > < p > however, in the domestic market, unlike only a few high-end products with certification when it first emerged, it is very common to have 80plus certified power supply products. Both the number of products certified and the overall level of certification have been significantly improved. However, with the development of power technology in recent years, the limitations of 80plus certification are gradually exposed. Today, let’s talk about the significance of 80plus certification in today’s market. < p > < p > 80plus certification was born in 2004, which is different from 3C, UL, CSA and other mandatory certification standards. It is a voluntary efficiency certification scheme. The name of this certification comes from its original certification standard: under the conditions of 20% load, 50% load and 100% load, the minimum conversion efficiency is not less than 80%, and the power factor under 100% load condition is not less than 80% 9. < / P > < p > the most important parameter of the certification is the conversion efficiency. Assuming that our power supply provides 300W power to the system, but actually the power obtained from the input is 375W, which means that the conversion efficiency of this power supply is 300W △ 375W = 0.8 or 80%, and the extra 75W only generates heat. < / P > < p > this means that as long as the conversion efficiency of the power supply is lower, the heat generated inside the power supply will be more. The heat generated will affect the performance of the power supply and the service life of the internal parts, and increase the load on the power cooling system. Therefore, in addition to energy consumption, conversion efficiency also affects the stability, reliability and silence performance of the power supply. < / P > < p > in the process of the implementation of the standard, in addition to the majority of consumers aware of the importance of power conversion efficiency, it also makes APFC and other efficient conversion technologies get rapid popularization, and greatly improve the overall conversion rate of the power supply product market today. With the passage of time, the standard of 80plus certification is very different from that of its initial stage. < / P > < p > the first is the conversion rate standard for certification. With the progress of power supply technology and technology, the standard required in the original version of 80plus specification is not too high. In addition, there is only one certification level, and there is no differentiation, so manufacturers naturally lack the motivation to participate in certification. Therefore, in the later development, 80plus has successively added five new certification standards, namely bronze, silver, gold, platinum and titanium gold, and the certification standards have been improved to varying degrees compared with the original version. < / P > < p > in addition, there are many adjustments in the certification method. In the original version of 80plus certification, the non redundant power supply needs to meet the specification requirements under 115V input voltage to pass the certification. < / P > < p > in China and other countries and regions using 220 V AC power, the initial certification results of 80plus will have certain deviation compared with the actual use, because according to a large number of experimental data, the overall efficiency of the same wide power supply using 230V input will be reduced by 1% ~ 1.5% compared with 115V input, and some non wide band power supply which only supports 200 ~ 240V input is more difficult Therefore, in 2014, 80plus added a separate 230V input certification program. < / P > < p > when we want to query the 80plus certified power supply sold in China, the relevant information can be found in the 115V internal category of the 80plus official website, while the corresponding information can be found under the 230V EU internal category for non wide power supply. < p > < p > in 115V input mode, the current starting standard is still 80%, and the most basic 80plus is still retained. At present, this set of standards is used by all the wide range power supplies on the market, and it is also the most commonly used set of standards by manufacturers. < / P > < p > in 230V input mode, although the certification name is the same, the entry standard has been raised to 82% / 85% / 82%. In other certification links, except for the titanium gold medal certification at 10% load, the other certification standards are higher than 115V, and the product requirements are higher. Therefore, only non wide power supply can use this standard for certification. < / P > < p > as a latecomer of 80plus certification and higher certification standards, the total number of products that have passed 230V certification is only one eleventh of that of 115V certified products, and none of the high-end household products can pass the 230V titanium gold medal certification. < / P > < p > in the current situation, basically no new power supply products will choose the original version of 80plus certification, and the gold and bronze certification products are the most common in the mainstream market. The silver medal between the gold medal and the bronze medal is more embarrassing, because the entry-level copper certification is cheaper, and the gold medal certification at the higher point has higher cost performance. The silver medal is in a position where the higher the price is, and the manufacturers are not willing to launch relevant products. However, in the high-end market, platinum gold medal is the main product at present, and the power supply that can meet the gold standard of titanium is still in a small number. < / P > < p > 80plus titanium gold standard not only adds the conversion efficiency requirement when the rated load is 10%, but also increases the power factor requirement under low load level. Moreover, this standard reaches a very exaggerated 0.95. It is very difficult to maintain a high power factor for its APFC converter when the load in the power supply is lower. To realize this standard, the power factor of the APFC converter will be very difficult The internal materials and design of the source have very high requirements. < / P > < p > this is also the most important change in titanium gold certification, because considering the power consumption level of CPU and graphics card, and the increasing rated power of power supply products, the performance under low load conditions is obviously more important than that under full load power. The emergence of this standard can encourage manufacturers to improve the performance of their products under low load conditions, which is also more in line with today’s actual application Use the scene. < / P > < p > although after years of development, the 80plus certification standard seems to be very perfect, and it is reasonable to take into account the development of other hardware, and it is reasonable to obtain consumer trust. However, many problems in this certification system have not been solved, and even become more and more common, which also leads to the problem that 80plus certification is gradually losing its value. < / P > < p > when we test the power conversion efficiency, we usually carry out the test with every 10% load rate as the interval. However, in the 80plus certification test, in addition to the titanium gold medal certification, other certification only needs to meet the corresponding standards under the scenarios of 20%, 50% and 100% load. Even for the titanium gold certification, it only increases the conversion rate requirement under 10% load These specific load conditions to comprehensively evaluate the performance of a power supply conversion efficiency, is obviously not comprehensive enough, but also for manufacturers to do “small action” left operation space. < / P > < p > if you really care about the overall conversion efficiency of the power supply, you should also check the detailed load tests carried out by evaluation agencies including pconline before purchasing. < / P > < p > because the products certified by 80plus are the test version provided by the manufacturer directly, rather than the retail version purchased directly from the retail market, the certification structure itself does not monitor whether the retail products on the market are consistent with the test delivery. This is equivalent to indirectly allowing manufacturers to take the optimized “gold products” as test samples. Even if the overall performance of the products is ordinary, they can also improve the performance under these three specific load rates through the “optimization” of software and hardware, so as to obtain better certification results. < / P > < p > this situation is more common in non first-line brands, especially those gold certified power supplies with “ultra-high cost performance”. There may be differences between the products certified by the manufacturer and the products you buy from retail channels. A basic troubleshooting method is to check the model on the power supply nameplate with the technical information in the 80plus certification report. If the name plate letter This problem may exist if there is a big difference between the product and its appearance. < / P > < p > according to the public information, the test and certification of 80plus will be carried out by external laboratories. They will conduct more than 20 tests, which can be divided into several parts, including AC and DC tests, two different voltage environment changes of 115V and 230V, fan test, load test, etc. These test items are not very different from the test items we generally know Big difference. < / P > < p > but the biggest slot point of the whole test is the test temperature. The test environment temperature of 80plus is controlled within the range of 23 ± 5 ℃, which means that their test temperature span is 18 ~ 28 ℃. Even if they are tested at 18 ℃, they are in accordance with the regulations. However, the results obtained in this test environment are not in line with the actual use environment of the vast majority of people. < / P > < p > as a reference, the operating temperature of the bare power supply will basically exceed 30 ℃ at 25 ℃ in our daily test. However, when the power supply is installed in the chassis, its operating environment temperature will easily exceed 40 ℃. When the power supply is running at a higher temperature, its theoretical conversion efficiency will also be relatively reduced, which means that the conversion efficiency of 80plus certification is generally It is slightly higher than the actual situation, which is also an important reason why we still need to test the conversion efficiency of the power supply with 80plus power certification report. < / P > < p > different from the certification standards specified by Chinese regulators, such as 3C certification, energy efficiency certification and PFC certification, there are no mandatory regulatory measures for 80plus certification in China. It is basically a “self-conscious” standard. Even if you have pasted the label but failed to pass the corresponding certification, it can still be sold on the market. Except that it may affect word-of-mouth after being found out, it is basically not true International risk, in the past, even a well-known manufacturer was found to be “false mark”, and then to supplement the certification, such as “first get on the train and then make up the ticket”. < / P > < p > in that year, Zhenhua hx450wsf-450p14xe was sold with 80plus gold medal certification under the name that the old product had been sent for test and passed certification, and the new power supply scheme did not change and did not need to be sent for test again. In the absence of certification, the consumer found that there was a difference in the certified model, and the internal materials and design of the new and old products were completely inconsistent, then the certification was completed. < / P > < p > these phenomena have been common since the emergence of 80plus certification, not to mention some “pheasant” brands listed at random, and even produced “original” certification such as 85plus, 90plus and 80plus small gold medals. However, over the years, no organization can supervise these counterfeiting behaviors, and 99% of consumers will not enter the 80plus certification list before purchasing Line related inquiries, it is even more impossible to get the opportunity to disassemble the power supply for comparison before purchase, and it is difficult to expose the products with problems. < / P > < p > if the above behaviors are “dishonest” of power supply manufacturers, the “OEM” phenomenon widely existing in 80plus certification is that the authentication program has obvious loopholes. As part of the brand power supply manufacturers adopt the public version scheme of OEM directly, the standard of 80plus certification is also the standard of “tailor-made” for this product. < / P > < p > in this standard, if the OEM factory ships to the brand manufacturer according to the power supply scheme that has passed a certain level of 80plus certification, but the new power supply has

Author: zmhuaxia