Eduardo Francis Carvalho Freitas

4 Questions 8 Answers 0 Followers

Questions related from Eduardo Francis Carvalho Freitas

Why does the power factor decrease with the increase of frequency in the AC/DC-AC (DC Link)?

In an AC/DC-AC (DC Link) with TRU 12 pulse diode, dc link and a controlled 12 pulse IGBT inverter, the power factor at the generator terminals decreases about 2% if the generator output voltage...

04 December 2015 7,727 11 View

What is the difference between Y/Y/D or D/Y/D transformers for a 12 pulse rectifier (TRU)?

For a 12 pulse diode rectifier is it necessary a transformer for a phase shift of 30 degrees. What is the difference between the Y/Y/D and D/Y/D transformers for 12-pulse rectifier?

30 November 2015 2,864 8 View

Which are the effects of THDv, THDi and PF in an AC/DC-AC converter?

THDv, THDi and PF at the generator terminals of an AC/DC-AC converter. Why is it necessary to correct these parameters at the generator terminals when these parameters are already corrected at the...

19 November 2015 768 4 View

How can I correct the power factor in the generator terminals of a AC/DC-AC converter?

What contributes to low power factor in the generator terminal? I am using a generator 40KvA, 230Vrms and 400Hz and controlling its field excitation in order to obtain 270VDC in the Dc-Link. The...

15 November 2015 6,606 4 View