News

15

2020

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03


Switching power supply manufacturers share how to choose and buy?

In fact, for customers, the price that is more concerned about the purchase of switching power supply manufacturers is. But at present, this kind of market is relatively serious, and the price of two models of the same wattage may differ by 50% or more. When we choose a product, we can not only measure it by price, but also look at its brand, material, quality, after-sales service and other aspects. Now there is some vicious competition in this industry on the market, so it will also have an impact on the development trend of our products, and the price is not relatively low. However, customers prefer to compare the prices of small processing plants with regular brands or manufacturers. Usually manufacturers will make some concessions so that they will have some order information, but this will also affect their own image. of. So what is the difference between the two? Generally speaking, switching power supply manufacturers are composed of many electronic components, but because of the potential danger of electrical equipment, this is also a closed product that does not allow the shell to be opened. This has caused many customers to only measure according to the trademark and wattage on it, as well as a relatively intuitive price. Actually, this is not as simple as we thought. In fact, the material can affect 70% of its quality, but the circuit principle, processing technology and other factors need to account for a lot of proportions. In terms of raw materials, it can be divided into three levels, the lower ones are leftover materials or fake materials. The middle is the secondary material. Better is good stuff. Many small manufacturers will choose side materials and fake materials to make up the number, and non-brand manufacturers will use better secondary materials, and only brand companies will choose better materials. Then in order to ensure that users can get better switching power supply manufacturers need good quality, each step will be more important, which is often overlooked by customers when choosing products, so everyone must choose Watch out.

18

2020

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03


Switching power supply manufacturers talk about the soft start process?

The switch tube is a more important device in the switching power supply manufacturer, and it has also received more attention in the debugging process of the power supply. This turn-off and turn-on action is actually a more complicated process, but we can also analyze it simply. For example: when it is turned on or off, it can be regarded as an ideal switch, and then when it is working, there are only two states, on or off. When people needed to test their characteristics before, they just stopped at the multimeter to measure the static current and voltage, and then needed to use the calculator to perform complex calculations. But now the oscilloscope has become the measurement platform of choice for many engineers. Some cost-effective oscilloscopes also come with power analysis software that simplifies setup and makes dynamic measurements easier. To put it simply, it takes time to turn on or off. This on-time is generally divided into extension time or rise time, but the off time is also divided into delay and fall. The switching power supply manufacturer is in the beginning of a cycle. Because the output voltage needs to charge the filter energy storage capacitor, the current is also very large, so it is generally necessary to use soft-start measures, and the space occupied at the beginning is relatively small. , and then it will gradually return to normal. This is why the working voltage is relatively low at the beginning, and then slowly rises back to normal. This time is usually relatively long, and some may reach hundreds of milliseconds. At this time, the storage capacity of the oscilloscope is very tested. Generally, the power-on waveform of the output terminal can be seen within 1.64 seconds of the power supply, or there will be two buffer rise processes. The above is the introduction of some soft-start processes of switching power supply manufacturers. I hope you can learn more about them.

21

2020

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03


Do you know how to judge the quality of the iron core of the power transformer manufacturer?

Many people know that power transformer manufacturers are mainly composed of iron cores and coils, but the quality of the iron cores will also directly affect the product quality. The three methods of visual observation are: 1. Look at its color and texture: Generally, a good iron core can be made of oriented cold-rolled silicon steel sheet seamless coils, which are usually gray, and the stripes are relatively fine, and this has no orientation. It is white and has a large gap. 2. Secondly, look at the thickness of the iron core: because a good iron core is made without seam coils, compared with silicon steel sheets, the thinner the quality is better, so the eddy current loss will be relatively Low. 3. Then we have to look at the production process of the iron core: see if it is smooth, flat, and uniform in thickness, and there is no burr in the front incision. Of course, if you want to more accurately judge the quality of the iron core of the power transformer manufacturer, you can also use it to test together to see if the no-load current and load conditions are more accurate. Both of these will be introduced below. 1. No-load test: A coil with a certain number of turns is wound on the iron core, and then there will be alternating current of the corresponding size. Measure the size of the current to judge whether it is good or bad, and if the no-load current is smaller, That means the quality will be better. 2. Load test: Observe the temperature change during the operation of the product during the test. If the temperature rises quickly, it means that its loss is relatively large, and the quality is not very good. On the contrary, it can be understood in this way. There are still many merchants in the market who use defective products as good products for sales, but it is difficult for customers to judge whether they are good or bad. I believe that through the above introduction, everyone has a certain understanding of the judgment, and I hope it can help you. .

24

2020

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03


Which winding material is the best for toroidal power transformer manufacturers?

Users who are familiar with toroidal power transformer manufacturers know that there are three types of winding materials, namely copper wire, aluminum wire, and copper-clad aluminum wire. So the question is, do you know which material it uses will be better? Follow along with me to find out! 1. Copper wire: If all copper wires are used, then its loss is very low, the heating will be faster, the power will be sufficient, and the conversion rate will be high. It can be used for highways, but it is This price will be higher than the aluminum wire. 2. Aluminum wire: This kind of wire is relatively light in weight. Although the price is much cheaper than that of copper wire, this kind of ductility is not very good, and it is very easy to break or thin during use. Although it heats up very high, the electrical conductivity is not very good, and it can't make enough power. Also, it will be very talkative during production, and the processing technology level is also very critical. 3. Copper-clad aluminum wire: For toroidal power transformer manufacturers, this price is also relatively good, but its temperature rise is also very high, the conductivity is relatively poor, and the loss is also very large, so it cannot make enough power. According to the above analysis, I believe that everyone knows copper wire, aluminum wire, and copper-clad aluminum wire. It is better to use pure copper wire for good products. This is also very easy to see in the market. Now, those with insufficient power in the market are generally made of aluminum wire or copper-clad aluminum wire. When users choose, in addition to looking at the price, the editor recommends that they can look at the quality of the product and the effect of use.

29

2020

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02


What is the role of the power transformer?

Nowadays, intelligent enterprises usually use power engineering as the power source, but the long-distance transmission of power engineering from the power station can reach the electricity. When the output power is transmitted at a constant speed, if the working voltage is very high, a small amount of current is required. So the current is proportional to the amount of current. So what is the role of power transformer manufacturers? Follow me below to find out. 1. The key role of household appliances is to protect the transmission of output power, then communicate with AC high-voltage transmission, convert the working voltage of the primary and secondary levels to the secondary, and then carry out the transmission of output power. 2. In the conversion of the working voltage and the conversion of high voltage and low voltage in the power line, the latter voltage is used. However, on the power transformer manufacturer, the working voltage can be input and then the working voltage of different levels can be selected according to the conversion for the customer, as well as clothing, food, housing, transportation and industrial production to provide different application environments. 3. There is also the transmission of data signals. The magnetic protection in power transformer manufacturers means that the signals used to transmit data are relatively stable and reliable. 4. This is mostly used to protect the driver, and then the driver is presented to different rated voltages according to the protection. There are also many applications of this kind, and this is also the point seen in the perspective. Presumably, this can also change the operating voltage so that the AC current can be stationary without magnetic induction of household appliances. Its influence in the power supply system is also relatively critical. This kind of characteristic is very good, and it is relatively safe to operate. The above is some of the detailed introduction of this time, I hope you can learn more after reading it.

04

2020

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03


What are the functions of power transformer manufacturers

I believe many people know that its main function is to help transmit power, voltage conversion and isolation of insulation, so it has been widely used in power supply technology and power electronics technology. The basic form of power transformer manufacturers mainly consists of two sets of coils with wires wound together, and the way of inductive inductance is usually called together. Whenever an alternating current is applied to one set of coils, the other set of coils will experience an alternating voltage of the same frequency, but the magnitude of the induced voltage depends on the coupling of the two coils and the degree of magnetic interlinkage. Usually the coil connected to the AC power source is called the primary coil, but the voltage across the coil is also called the primary voltage. Under the induction of the secondary coil, the voltage may be larger or smaller than the primary voltage, which is also determined by the possible turns of the primary coil and the secondary coil. Therefore, power transformer manufacturers will have two types of step-up and step-down. Many have fixed iron cores, including primary and secondary coils in Shangrao. For the high permeability of iron materials, a lot of magnetic flux is confined in the iron core, so the two sets of coils can obtain a relatively high degree of magnetic coupling. In the above, the coil and the iron core are combined with each other, and the ratio of the primary and secondary voltages is basically the same as the number of coil turns between the two. Therefore, in terms of the number of turns, it can usually be used as a parameter index for boosting or bucking. This is also a more important appendage in the modern power system. Increasing the transmission voltage will make long-distance transmission of power very good. For the step-down, you can also use a variety of power. The above are some related introductions this time, I hope you can learn more about them.

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