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How ultraviolet sterilization works
The working principle of ULTRAVIOLET sterilization is to destroy the DNA (DEoxyribonucleic acid) and RNA (ribonucleic acid) molecular structure of microbial cells by using UVC ultraviolet radiation (mainly 240nm ~ 280nm), resulting in the death of growing cells and (or) regenerative cells, thus achieving the effect of sterilization and disinfection. So how does ultraviolet ray disinfect sterilization lamp radiate UVC ULTRAVIOLET ray? At present, there are two main light sources
How to suppress EMI of switching power supply
EMI interference sources of switching power supply are mainly reflected in power switch tube, rectifier diode, high-frequency transformer, etc. the interference of external environment to switching power supply mainly comes from grid jitter, lightning strike, external radiation, etc. For the research on EMI of switching power supply, some start from the mechanism of EMI generation, some from the impact of EMI, put forward many practical and valuable programs.
Three performance indexes of switching power supply
In terms of input anti-interference performance, due to the characteristics of its own circuit structure (multi-stage series connection), the general input interference such as surge voltage is difficult to pass through. Compared with linear power supply, the output voltage stability of switching power supply can reach (0.5-1)%. As a power electronic integrated device, switching power supply module should pay attention to the following points in the selection:
Overheat protection circuit of power adapter
The temperature resistance and fire resistance of the power adapter are not only directly related to the reliability and service life of the power adapter, but also directly related to the risk of fire and the safety of the user's life and property. The heat sources of the power adapter are mainly Schottky rectifier diodes, high frequency switching transformers, power MOS tubes, and filter electrolytic capacitors. Among them, the temperature rise of power MOS tubes, high frequency transformers and rectified Sch
Find the Correct Power Adapter and Cable for Your Mac Laptop
Learn which power adapter, cable, and plug are suitable for your Mac laptop. The power adapter for Mac notebook computers has eight power specifications
Do you know all the signs on the power adapter's name plate?
In general, each power adapter has a name plate. Do you know all the signs on the name plate? What do you mean by the nominal voltage and current of the power adapter (hereinafter referred to as the power supply)? First of all, the nominal voltage of the power supply refers to the open circuit output voltage, that is, the voltage when there is no load outside and no current output. Therefore, it can be understood that this voltage is the upper limit of
Analysis of the development overview, key technologies and future trends of switching power supplies
1. Development Overview Switching power supply is known as high-efficiency and energy-saving power supply. It represents the development direction of regulated power supply and has become the mainstream product of regulated power supply. For different equipment applications, switching power supplies are divided into two categories: (1) medium and small power switching power su
The Development Trend and Market Prospect of Power Adapter
The power adapter is a power supply conversion device for small portable electronic equipment and electronic appliances. It is generally composed of a casing, a power transformer and a rectifier circuit. According to its output type, it can be divided into AC output type and DC output type; according to the connection method, it can be divided into wall plug And desktop.
In the current hydropower project, the switch power supply is essential household supplies, switch power leakage how to do, there are many switch power supply products in the market, many functions, many brands, so, the choice also need special attention. A good brand will avoid leakage. What is the standard for leakage of switching power supply? Let's take a look at some of the troubleshooting of the switching power supply, so that we know what to do about the leakage of the switching power supply.
Analysis of the composition of notebook power adapter
There are many kinds of power adapter, so we don't understand it very comprehensively. How to understand the composition of the notebook power adapter, the following benefits come, small make-up for your professional answer notebook power adapter main composition. 1. The function of varistor is that when the external voltage is
The Era of Wireless Charging is Coming
Remember the physics lesson in junior high school that was the most headache for electromagnetism who always wanted to wander? The rule of the left and right is that other people besides Xueba are really unable to cope with it. Although electromagnetics was a big problem for us during our student years, nowadays, it has brought many conveniences to our lives. For example, wireless charging has become popular in recent years. Did you know that from the discovery of electromagnetic induction to wireless charging, has humans walked for more than 180 years?
The concept of nominal voltage and current in power adapter
Since the availability of smart portable devices, people have been inseparable from the help of power adapters. In daily life, sometimes you need to use a non-matching power adapter for charging. In this case, you need to have enough knowledge of the voltage and current externally marked on the power adapter. This article will focus on these two values Explain for everyone.
The power adapter is a conversion device for small portable electronic equipment and electronic appliances. It is widely used in telephone equipment, game machines, language repeaters, walkmans, notebook computers, cellular phones and other equipment. The power adapter is generally composed of a housing, a power transformer and a rectifier circuit. According to its output type, it can be divided into AC output type and DC output type; according to the connection method, it can be divided into wall-plug type and desktop type. The power adapt
How does the power adapter store energy?
With the development of electronic technology, more and more electronic products are used, and more and more energy storage batteries are used, which means the power adapter is indispensable. Now power adapters are everywhere in our lives. Common are 12V charger, 24V charger, 36V charger, 48V charger and so on. Of course, there is a higher battery voltage, with the corresponding voltage power adapter.
How to maximize the fast charging effect?
Question 1: What is fast charging technology? Fast charging can be understood very literally, that is, to increase the charging speed of mobile phones. So what is the way to achieve it? The principle is also very simple and easy to understand. Quick charge adjusts the input voltage and current value of the mobile phone through the chipset, thereby shortening the charging time. And it is common to increase the
LED switching power supply selection and use matters needing attention
The high frequency of LED switching power supply is the direction of its development. The high frequency makes the switching power supply miniaturized and makes the switching power supply enter a wider application field, especially in the high-tech field, which promotes the miniaturization of high-tech products. Lightweight. In addition, the development and application of switching power supplies are of great significance in saving energy, saving resources and protecting the environment. So what should we pay attention to when selecting and
QC3.0 Fast Charging Solution (Charger)
The battery capacity of smart phones is getting larger and larger. In addition to the power saving ability, charging speed has become a feature that users pay more and more attention to. Qualcomm's Quick Charge technology has become one of the industry's models. Following the Quick Charge 2.0 specification, the latest Quick Charge 3.0 technology (referred to as QC3.0), the average mobile phone only needs to charge about 35 minutes, the power is It can be increased from 0% to 80%; while traditional mobile devices that do not use Quick Ch
What is the cause of notebook power noise?
In daily life, have you ever encountered this kind of situation?What is the cause of the noise when you use the laptop power adapter? Next, I will explain the reason in detail for you, hoping to help you.
The future development direction of chargers and adapters
In any industry, if you do not want to be eliminated by the market, you must keep up with the industry's development direction. The former industry giant Nokia was directly slashed because it failed to keep up with the development of smart phones. So where is the development direction of switching power supply? Charger manufacturers believe that the future development trend of power supply is green, miniaturized, digital, and integrated.
What is an aging test? why do power adapters need to do an aging test?
The burn-in test simply means that the power adapter is working at full capacity over a period of time to see what problems the power adapter may have. Of course, one has to ask, how long is a period of time? 1 day? 2 days? It is common practice to age for at least a few hours, depending on the quality and cost of the adapter. In fact, a little more popular understanding, the aging test is actually a very cruel destructive test, because only by doing so, flow to the client is the product of the perfect product, good power adapter manufactur
Classification The only artificial mercury (alloy) lamp light source that can output enough UVC intensity for engineering disinfection. Ultraviolet germicidal lamps are made of quartz glass. Mercury lamps are divided into three types according to the difference in mercury vapor pressure and the intensity of ultraviolet output in the lighted lamp: low-pressure low-intensity mercury lamps, medium-pressure high-intensity
What are the specifications of commonly used power adapter DC plugs?
The connector between the power adapter and the electronic product it supplies is called the DC head. Because the output of the power adapter is DC, the DC connector is called the DC head. There are many specifications of the power adapter DC head. The power adapter The most common DC interface specifications are generally circular interfaces, which are divided into tuning forks and straight plugs.Let's introduce what are the commonly used DC plug specifications.
What you don't know about the power adapter
Generally speaking, the function of power adapter is transformer and rectifier. Home AC is 220V, and our computer is 12V DC (as if), so we can be sure that the power adapter is a transformer and rectifier. The adapter is a transformer, so we should all know that AC 220V is transformed into DC through the transformer and the rectifier. There is consumption here, and these consumption will be converted into heat, so it is normal that the power adapter will generate heat.
Use and precautions of ultraviolet disinfection lamp
Ultraviolet (UV) is a kind of low-energy electromagnetic radiation. The ultraviolet used for disinfection is C-wave ultraviolet. Its wavelength range is 200~275nm, and the wavelength with the strongest sterilization effect is 253.7nm. Ultraviolet rays can damage the DNA and RNA of microbial cells, break their structural bonds or undergo photochemical polymerization reactions, thereby losing their reproductive and surviving power, and achieve the purpose of sterilization and disinfection.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.