Hello,
I'm currently having some issues with the Power Factor of an Electronic design (please see attached image: Basic_circuit.png & SMPS_Sch.png) and I was hoping someone could aid me in
optimizing it.
Measuring the Power Facter (PF henceforth) on a power meter reveals a PF of only 0.17.
I have tried adding inductance in series with the circuit, but to no avail. PF has decreased if anything.
I tried measuring voltage and current from the wall socket to the device using an oscilloscope, to see an indication of the actual PF.
Attached file "LEDS_Volt+Cur_Ph_scope_Cap_2.png" - please be advised: Current measurement is not to scale. Power meter estimated a current of 0.4A.
Voltage and current is definitly out of phase, although a PF of 0.17 seems a bit low.
At this point I wanted to try adding active PFC to the circuit, namely a small circuit in the input of the two SMPSes. Unfortunately I
have little to no idea of what kind of circuitry/IC is best used?
Or for that matter whether it will actually do any good in optimizing PF of the system?
Do you have some recommendations on designing a small circuit that will improve the Power Factor? Or any advise on generally improving PF?
Sincerely yours,
David Larsen
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