Timeline for power factor correction and switched power supply efficiency
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
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| Apr 17, 2016 at 1:03 | comment | added | user80875 | I understand. That is the efficiency of the power supply. Adding a PFC circuit inside the power supply adds to the losses inside the power supply and reduces its efficiency. In a SMPS, the PFC is not simply a capacitor, but even if it was it would use some power because it has internal resistance it is not an "ideal" capacitor. | |
| Apr 17, 2016 at 0:10 | comment | added | VMMF | And I'm talking about this efficiency http://www.hardwaresecrets.com/understanding-the-80-plus-certification/ | |
| Apr 16, 2016 at 23:56 | comment | added | VMMF | Thanks, I understand what PFC is. My question is, how it is related to the switched power supply efficiency? | |
| Apr 16, 2016 at 16:28 | comment | added | user80875 | Some power is lost (converted to heat) in the power factor correction circuit. That means that the total input power to the power supply is increased by the addition of power factor correction. Power losses are reduced in the power distribution wires, transformers etc. all the way to the power generating station. The user of the power supply gains mostly a "cleaner" AC source and lower AC circuit current allowing. | |
| Apr 16, 2016 at 15:26 | comment | added | VMMF | What do you mean by "reduces the efficiency of the equipment", that after introducing the PFC circuit the amout of real power consumed is higher? How is this related to the efficiency when working under several loads, i.e the efficiency of the switched power supply? From what you're saying can I imply that it decreases as now the denominator of the efficiency ratio is higher? | |
| Apr 16, 2016 at 13:37 | history | answered | user80875 | CC BY-SA 3.0 |