The world has paid more and more attention to environmental protection and energy conservation. From individuals to enterprises, more and more people are beginning to realize the importance of energy conservation. The development of power supplies also follows this trend, and new products that meet this trend have been developed.
To increase income and reduce expenditure, it is also essential to reduce the power consumption of products, in addition to turning off lights and turning off electricity. PC products are very important sources of energy for both individuals and corporate users. Most people think that using low-power CPUs, memory, and chips can save power for the computer system, but in fact the real power is the "power"!
Nowadays electronic product technology is changing with each passing day, and 45-nanometer processing technology has been implemented, and even moving towards 32-nm, the power consumption of the CPU (main processor), the main power-consuming component of the IT industry, continues to decrease, requiring power output power and watts. The number also decreases. However, the reduction in wattage needs to increase the conversion efficiency at the same time, which increases the technical difficulty of power supply development. The better the conversion efficiency, the less power consumption will be. Therefore, the improvement of the power conversion efficiency will be of great help to energy conservation.
As an important part of energy use, the power industry cannot place itself outside the global environmental protection trend. The efficiency of the power supply used by the global personal computer (PC) is only increased by 1%, and it is expected to save about 10% in one year. The electricity generated by the Yuzuo Power Plant will be a very important contribution to environmental protection and resources. Therefore, in recent years, the power industry has also developed toward the direction of energy conservation and carbon reduction to meet the market demand.
Switch Power Supply (Switch Power Supply) based on the semiconductor switch, the input AC power into DC, and then output to the host equipment. If there is no loss, a notebook computer that requires 60 watts of power should have only 60 watts of power output and input, but it actually requires 100 watts of input. Because the conversion efficiency of the PC power supply in the past was only 60 to 70%, the original 100 watts of AC input only converted 60 to 70 watts of DC power, and the remaining 30 to 40 watts were all converted into heat energy and lost in the air.
The cause of power loss is related to factors such as the internal capacitance of the power supply, inductance, poor quality of the diode, poor wiring, insufficient number of turns of the coil, and small capacitance. As the power consumption of PCs increases, the power supply power also needs to be higher and higher, and the power of many power supplies on the market is already approaching 1,000 watts. Therefore, the energy waste caused by low conversion efficiency is even more serious. It is difficult for the average person to distinguish the quality of the power supply. Therefore, the third-party certification body is particularly important. The most interesting issue in the PC category is the new standard of '80 PLUS', which has become an important standard for the power industry to measure product performance.
'80 PLUS' was set up for Ecos Consulting in the United States. Its purpose is to promote the development of energy-saving technologies to move forward with this standard. Power supply is required to be 20% (light), 50% (typical), and 100% (full). Under different loads, the conversion efficiency must reach more than 80%. At the same time the power factor correction must be greater than 0.9 to obtain the '80 Plus' approval.
With the efforts of various manufacturers, the efficiency of power supply products continues to increase, and the emergence of the 80PLUS standard has forced electronic manufacturers to strive to ensure that the design quality of power supply products meets specific standards. At present, many server companies are even flaunting the power supply they carry. They have already achieved a conversion efficiency of more than 90%, and the intangible power consumption has become even less. This not only significantly reduces energy waste for the earth, but also saves consumers a significant amount of money. Considerable electricity costs.
The PFC power factor correction circuit is also designed to be used on the power supply to reduce the loss of virtual work.
The so-called power factor refers to the ratio of the effective power divided by the total power consumption. The larger the power factor value, the higher the power utilization rate. The operating principle of the power factor corrector is to control the timing and waveform of the AC current input so that it is as consistent as possible with the DC voltage waveform, allowing the power factor to approach 1.
The lower the power factor, the lower the power efficiency, that is, the more power will disappear and wear out. When the general electronic device has no power factor correction, its power factor is only about 0.5; and an electronic device with a PFC power factor correction function can increase the power system capacity, stabilize the current, and reduce power waste.
The PFC power factor correction circuit can be classified into Active and Passive. Passive PFC, a combination of inductors, capacitors and other combinations to reduce the harmonic current, the input current is low frequency 50Hz to 60Hz, requires a lot of inductance and capacitance, and its power factor correction is only up to 75% ~ 80%. Active PFC, using control circuits and power switch components, adjusts the input current waveform to be as similar as possible to the output voltage waveform, with a power factor correction value of approximately 100%.
On the whole, the power of active PFC is lighter than the passive PFC with bulky components, which is in line with the trend of lightweight design for consumer electronics products; and active PFC can increase the power factor value by more than 95%. Passive PFC is about Can only improve to 75%. Using active PFC can save more energy than passive PFC.
At present, Intel (Intel) has launched the Save the Climate Action Plan, which aims to promote the use of power and reduce power consumption. The main purpose of this project is to save energy and reduce greenhouse gas emissions, and it has been active since 2007. Energy Star 4.0 has listed 80 Plus as standard.
The 80% conversion efficiency is only the basic requirement for the power supply performance. From a longer-term perspective, after overcoming technical and related components, the power conversion efficiency must reach a level higher than 80%. It is expected that the power conversion efficiency of personal computers or servers will need to reach 90% or more in the future, but this realm does not happen overnight, but gradually grows year by year. It gradually expands from 80 PLUS to 80 PLUS BRONZE (bronze) and 80 PLUS SILVER ( Silver), 80 PLUS GOLD (gold medal) and other standards (such as schedules) up to 90 PLUS standards.
At present, some products can already reach the silver level. It is believed that in the next 1 to 2 years, 90 PLUS will soon become the industry's universal standard, allowing the power industry to further improve its energy-saving and carbon reduction capabilities.
Energy-saving measures aim at improving efficiency and cost-effectiveness, and developing lower-power, more environmentally-friendly products for the IT industry. In the past, people always pursued the development of power toward high wattage. Now this has no significance. Except that some Gaming players have high wattage demand for power supplies, the current power supply is enough for most users.
Avnet Electronics Marketing Group realized this trend of power supply three years ago. It set up a power supply design center in Taiwan, began to develop and design 300W and 500W ATX80+ models, and successfully passed the United States. 80PLUS Association certification, using their own personal experience to guide customers and help them quickly put products into new markets.
Electronic products are environmentally friendly and energy-saving. They are equipped with "80PLUS" power supplies, which can increase power conversion efficiency and save power consumption. The “80PLUS†certification, or having active PFC circuits, is a power-saving indicator of power, and is a selling point for the industry to attract consumers.
The Avnet Electronics Components Power Design Center also developed a 140W to 300W LCD TV POWER solution two years ago that can directly support 26-inch to 47-inch TV power supplies. It adopts LLC architecture design, when the input 100V, the efficiency can reach 87%, if the input is 240V, the efficiency can reach more than 90%.
In addition, miniaturization is also the trend of future power supply R&D. For example, the thickness of a liquid crystal television (LCD TV) is reduced from the original 100 mm to 80 mm, so the thickness of the power supply board must also be reduced from the original 35 mm to 25 mm, which is 20% smaller than in the past. The size of the notebook computer (NB) power adapter is also getting smaller and smaller. The power supply design center of the Avnet Electronics Components Group has developed a product that is only half the size of the universal adapters currently on the market.
The power industry is developing toward the two major directions of energy conservation and miniaturization. We believe that the development direction of new products will be more readily accepted by the market and will also drive new business opportunities.
The improvement of conversion efficiency requires the development of more new technologies to support, and at the same time, the technology of power-related components also needs to be improved so that the power supply can be smoothly developed in the direction of energy saving and miniaturization. In addition to this, it is even more important to continue to reduce the cost, so that users are willing to use more energy-efficient power supply, otherwise waste of resources in the development of renewable energy-saving products, but because the price is too high, resulting in high songs, products can not be universal, energy-saving The good will flow down.
The development of new products in the field of related components such as light-emitting diode (LED) power supplies, solar energy converters, and battery storage is the future direction of power supply development. Although LED, solar energy and other industries have a relatively short history of development, LEDs have gradually been applied to street lamps, traffic lights and other fields, and are gradually applied to the daily market of lighting equipment.
The main problem with high-brightness LEDs is the fear of heat, and high heat can cause LED failure. The Avnet Electronic Components Division's various Avnet Design Centers in Asia are actively working to solve this problem. Currently, cooperative suppliers have begun to provide some products to meet the municipal government's designated demonstration roads for testing. It is estimated that 2 to 3 years may begin to see the gradual popularization of LED lighting, and the application of power in this field will surely be developed by leaps and bounds.
Providing strong design support for customers in China and in Asia, Avnet Electronics Components has established six system design and development centers for different applications in the Asia-Pacific region based on its rich experience and design strengths in different fields to provide customers with close to their needs. Design support. These include the Shanghai Center, which specializes in LED lighting, automotive, and industrial. They specialize in the Hong Kong center of FPGAs and the Shenzhen Center focusing on LCD TVs, multimedia, microprocessors, and LED lighting. Singapore Centers for wireless connectivity and high-brightness LED lighting, home appliances and power supplies. , Bangalore Center for automotive electronics, LED lighting and industrial design, and power product research labs in Taiwan. The different core competencies of each design center allow us to provide value-added services to customers in different areas of professional experience, but also to gather the advantages of various fields to achieve a complete solution.
In addition to the design center's investment, Avnet also cooperated with the independent design studio to strengthen design services. Avnet has partnered with many independent design studios with strong design capabilities in Asia to integrate their IP into product solutions that meet customer needs and accelerate the time to market for their products.
Thermal Relay is used to protect AC three-phase asynchronous motor/electric motor against overload and open phase. Korlen electrical appliances produce thermal relay switch in wholesale,being a good thermal overload relay suppliers from china. We also offers Manual Motor Startor , AC Contactor, LED Light, Circuit Breaker etc.
Thermal Relay
Thermal Relay,Latching Relay,Reed Relay,Polarized Relay
Wenzhou Korlen Electric Appliances Co., Ltd. , http://www.korlenelectric.com