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1. different power products, the conversion efficiency of different;
2. the same power products, under different working conditions, the conversion efficiency is also changed.
The first point is easily understood, because different power products, their inherent transformer circuit, current converter circuit and function will be different, coupled with their power should not the same, different conversion efficiency It granted. But why the conversion efficiency of the same product which will change it from the first power supply output voltage to start:? Power supply input voltage is rated 220V, and the output voltage will have + 12V, + 5V, + 3.3V different specification, which means that the power supply has at least three different years ( "coil winding ratio", "magnetic induction leak rate" different) of the transformer, the transformer due to the three kinds of power are not the same, it means + 12V, + 5V and + 3.3V voltage output corresponding to their respective transformer conversion efficiency is not the same.
In general, + 12V voltage output and is responsible for the CPU and the drive motor-powered hard drive, + 5V output voltage is responsible for the hard disk and optical drive PCB circuit board power supply, + 3.3V voltage output circuit module is a memory-based board powered by. When the computer is in a different working conditions, frequency of use and the workload of each member will be different, resulting in different voltage output circuit workload fluctuations, under different working conditions, the power conversion efficiency is also changing.
Through the above analysis we know that the power consumption of their own float is not great, and the power output of the external floating relatively large, so that the power output is generally the larger the load, the unit load "share" power consumption on its own The smaller, then the conversion efficiency is higher.
Power conversion efficiency requirements specification
Conversion efficiency difference between PFC circuit power factor recently, some nominal own power conversion efficiency up to 98%, but careful studies have found what they call "conversion efficiency" is actually a power factor of active PFC circuit, this factor is characterized How much power is the power utilization (actual energy input power / energy power supply grid), in terms of the active PFC circuit, the power factor can reach 98% or even 99% of the level; and we call the conversion efficiency, the power supply should be other equipment supplied energy / input energy supply, both characterized the object is not the same.
However, there also needs to be noted that "power factor" is not equivalent to "efficiency." Now some businesses will be 0.99 active power factor can be interpreted as a 99% power conversion efficiency, it is clear that this is not right. Although the two concepts are described in power, but for the individual meanings of the two concepts are not the same. PFC "Power Factor" is high for the country to save money, and the "conversion efficiency" is higher for users to save money.
Initially, the power conversion efficiency of only about 60%; in Intel's ATX12V 1.3 power specification, the provisions of the power conversion efficiency of not less than 68% at full load; and in the ATX 12V 2.01, the conversion efficiency of the power put forward higher requirements - not less than 80%.
Therefore, when purchasing power, it follows from the power supply specifications we can get a general understanding of their power conversion efficiency level. The reason why both before and after the power supply specification has such a big difference to the power conversion efficiency of the provisions, for three reasons:
1.the new ATX 12V 2.01 specifications based on new electrical manufacturing technology, can achieve higher conversion efficiency;
2. because a significant increase in power consumption host, if the power conversion efficiency is not increased, then the whole huge power and heat will seriously affect the normal use;
3. higher environmental and energy requirements.
Hanfong New Energy Technology Co., Ltd. is a professional power inverters manufacturer and solar inverter manufacturer, our products enjoy an excellent reputation in the market, if you need quality inverter, please contact us.