Five small power EMC and energy efficiency evaluation

Before the "five small power supply safety depth evaluation", we understand the five small power drive, power supply in the safety aspects of the next, let's take a look at how the performance of the five samples of EMC and energy efficiency in the.

The test sample information is as follows:

Let's take a look at the sample:

Valley sample

Niu Bao sample

Intellectual sample

Precursor sample

Collar sample

EMC

In the field of lighting, LED products with its energy saving and efficient product characteristics, in recent years has gradually become the mainstream lighting products. We are entrusted by the light of the market on the LED driven products conducted a random sampling, analysis of the electromagnetic compatibility of such products. To test our past experience, EMC LED driver is mainly concentrated in the conduction and radiation disturbance (30MHz-300MHz), the three EMC surge test items, so the random sample we use EMC standard of the national standard from the above 3 test items for testing and evaluation.

Conduction test analysis

Conduction interference refers to the interference signal generated by electronic equipment through the conductive medium or common power line interference. The 6 samples of power are less than 25W, according to the current requirements of the latest version of the domestic standard GB17743-2007 lamps, the test voltage in strict accordance with the standard requirements, all models meet the test requirements of conduction. Wisdom of all frequency points of the worst frequency margin of -5.88dB, all points of view of the frequency of the worst point margin of -9.18dB, from the maximum to reduce the intensity of conduction interference point of view, the optimal design of the valley section.

Analysis of radiated disturbance (CDN method)

Radiation interference refers to the interference signal generated by an electronic device, which is used to transfer the interference signal to another electric network or electronic device through the space coupling. The power of the 6 samples is less than 25W, according to the latest version of the international standard GB17743-2007 lighting standards, test voltage in strict accordance with the requirements of the standard. The lowest frequency point margin of all the frequency points of the valley is -17.50dB, from the point of view of minimizing the intensity of the radiation interference, the optimal design of the valley.

Surge analysis

Analysis: the measurement of the 5 samples are less than 25W, according to the latest international standards for the light of the GB/T version of the 18595-2001 requirements, these 6 samples are to meet the requirements of the current GB/T 18595-2001 version of the surge.

Summary

Relative to the traditional concept of security, electromagnetic compatibility security is easily overlooked. With the development of electrical equipment, electromagnetic pollution is increasing. As one of the most common use of lighting equipment and equipment can be said to be almost everywhere, how to ensure the electrical safety of LED products, improve energy efficiency and highlight, pay attention to the design of electromagnetic compatibility, in order to reduce the electromagnetic hazard, also need to pay attention to and solve the problem.

Energy efficiency

With the development of economy and the improvement of living standards, energy consumption continues to grow. Lighting electricity consumption accounts for about 13% of the country's total electricity consumption. LED light source lighting products for its energy-saving and efficient product characteristics, in recent years, the development of leaps and bounds. Countries around the world have issued a number of relevant energy efficiency certification indicators to assess the specific characteristics of energy-saving products.

Description: according to the product of the nominal electrical parameters, some models increased the 115V/60HZ test data for reference.

The test is determined by reference to the ERP directive 278/2009, as shown below:

The relevant test data are as follows:

According to the national energy efficiency standards, the V level is lower than 0.3W (no-load power nominal output power <50w), and the IV level for the no-load power efficiency is lower than that of 0.5W; with an average value of 25%, 50%, 75%, 100% to contrast, but now all the samples are 25% cannot load, so the test results 50%, 75%, 100% can only refer to the energy efficiency of the average power factor and the corresponding comparison. Among them, the energy efficiency of the crown is the best, reaching 82.49, followed by the source, energy efficiency of 81.8.

In short, the higher the Efficiency value of the product, the better the energy efficiency.

epilogue

From this test, 5 samples have some defects, especially in dismantling safety, some driver failed the test, suggested that enterprises in the production process, should pay attention to the relevant provisions of the safety regulations, strictly control product quality.

Integrated all the data, Aladdin evaluation room believes that the 5 samples involved in the test, Branch Valley and collar performance is better than other samples.

Related reading: five small and medium power source evaluation can be too safe?

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