-
What is The benefits of Power Factor Correction
[2012-05-07]
The benefits of power factor correction including; 1. PFC power supply save energy. 2. Increased system capacity 3. Improved voltage Low power factor means poor electrical efficiency. The lower the power factor, the higher the apparent power drawn from the distribution network. When low power factor is not corrected, the utility must provide the nonworking reactive power in addition to the working active power. This results in the use of larger generators, transformers, bus bars, wires, and other distribution system devices that otherwise would not be necessary. Electronic equipment with PFC could promote it-self energy utilization to help cut consumer bill in percentage , also PFC is a environment friendly technology, reducing the harmonics that creat electrical polluation to benefits the society as a whole.
-
What are the characteristics of passive PFC
[2012-05-07]
The passive PFC usually adopts the method of inductance compensation to promote the power factor through reducing the phase shift between the fundamental current and voltage of AC input, but the power factor of the passive PFC can reach 0.78，and the thermal value is relatively bigger.
-
What are the characteristics of active PFC
[2012-05-07]
The input voltage of the active PFC ranges could be from 90VAC to 264VAC; the high power factor is higher than 0.999, and it is featured in low-loss; the ripples of the output DC are quite small.
-
What is PFC (Power Factor Correction)
[2012-05-07]
Power factor is the relationship between working (active) power and total power consumed (apparent power). The ratio of true ac input power to the apparent ac input power. Essentially, power factor is a measurement of how effectively electrical power is being used. A higher power factor represents a more effective use of electrical power. Power Factor Correction on a switching power supply controls the timing and wave shape of the input current drawn to maintain the current waveform approximately in phase with and of the same shape as the line voltage. This results in a power factor of approximately 1.0. This is important when electronic equipment consumes a significant amount of power, since otherwise the facility power system could exceed its current ratings for the power consumed and potentially impact other equipment on the same power system.
-
What is the primary function of EMI circuit
[2012-05-07]
The primary function of EMI circuit is to remove undesired noise and ripple from the electric network, and prevent the high frequency generated by the power switch circuit from influencing the electric network.
-
The power and PFC
[2012-05-07]
With the computer components' performance improving, customers pay more attention on the power supply. In the market, about the real and maximum watts,which is also a concept more even been speculated. However, the computer's power supply as the "heart", it is not only the importance of strong and stable power output, but also some of the important factors can not be ignored,for example,the PFC(Power Factor Correction). There are two main PFC, one called Active PFC, another is passive PFC. Active PFC itself is equivalent to a switching power supply, driven by controlling the chip switch on the input current modulation, and make it as far as possible simultaneously with the voltage,the value of Power Factor Correction can reach more than 98%, so often used the power supply with Active PFC circuit ,its energy conversion efficiency is in more than 80%, it is far more than the general passive PFC circuit, but its costs are relatively high, accounting for almost the entire power supply to the overall cost of 2-3%. Passive PFC,the value of Power Factor Correction just can reach about 75%, and the energy conversion efficiency is about 50%. For example,one 300watts power supply with active PFC, its energy conversion efficiency is 80%, then it requires 375watts Alter Current;On the contrary, a low efficiency 300watts power supply with passive PFC,the energy conversion efficiency is Only 50%, then it needs 600watts Alter Current can be to output 300watts Direct Current to the computer, exactly a waste of 325watts. Therefore, We recommend that you buy energy-saving power supply which must be first adopt active PFC power circuit design.our products such as the 1U、2U series used active PFC circuit design,it is popular in the industrial computer area for its strong stability and energy-saving now.
News Categories
