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| What is the power factor? |
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Computer power in the PFC is a very important parameter, the full name of the computer power factor, referred to as PFC, equal to the "apparent power times the power factor", namely: Power Factor = Real Power / Apparent Power. Power Factor: Power factor characterization of the active power output capacity of the computer. Power is a measure of the energy transfer rate, it is in the DC circuit voltage V and current A and the product. In AC system will have more complicated: that is part of the AC current in the load in the cycle does not transmit power, it is called reactance current or harmonic currents, it makes apparent power (voltage Volt x Current Amps) than actual power. Apparent power and actual power of the range leads to the power factor, power factor equal to the actual power and apparent power ratio. Only electric heaters and light bulbs linear load power factor is 1, the actual power of many devices and the apparent power of the difference is very small, negligible, and as such capacitive equipment such as computers is a great difference very important. Recently, PC Magazine, a U.S. study shows that a typical computer power factor is 0.65, that is, apparent power (VA) than the actual power (Watts) is 50%! |
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