How Big a Gen to Run a Converter? Some Info.
EDIT: some of my earlier posts in this thread have the wrong idea. As more info came in later, things got less confusing--sort of! :) --------------------- Another look at this topic. It is n...
Forum Discussion
http://wfcoelectronics.com/wp-content/uploads/2015/04/12-1.pdf
Shows PF is "unity" 0.99, "efficiency" is 84% based on VA, input is 1620 "watts." Output would be 14.4 x 100 = 1440, so
1440/1620 = 89%
I would have thought 1440/1620 meant that PF is 0.89, but they claim 0.99. The 1620 is also VA with unity PF, so the efficiency is 89% too, but they claim 84%
Perhaps they rate it at 13.6v output? 1360/1620 = 84% Ah ha!
But then does that mean you need more generator than 1620 when at 14.4? 1440 x 100/84 = 1714. Ah ha! So forget that 1620, the truth must be more like 1714 required VA supply for the 68100 at 14.4 and 100 output.
ISTR PD rates their converters at 13.6v too, which throws things off when trying to figure PD specs for 14.4v
EDIT--I thought the PF business was about how the "supply" had to deliver the VA (higher number) to make up for the PF of the load, so the load's "watts" is the lower number and not what the generator really has to supply. So the number we want is the VA "supply" needed.
Now I am unclear on whether that rated load watts is its input required or its output.
I recall with MPPT solar controllers they take the efficiency from "watts" out/"watts"in. Converters use "power" out/"power" in
the question now is "Which 'power' are we talking about? VA or Watts?
Whatever, I am quite sure we want the VA needed from the generator to decide if it will have enough supply to run the converter.
Shows PF is "unity" 0.99, "efficiency" is 84% based on VA, input is 1620 "watts." Output would be 14.4 x 100 = 1440, so
1440/1620 = 89%
I would have thought 1440/1620 meant that PF is 0.89, but they claim 0.99. The 1620 is also VA with unity PF, so the efficiency is 89% too, but they claim 84%
Perhaps they rate it at 13.6v output? 1360/1620 = 84% Ah ha!
But then does that mean you need more generator than 1620 when at 14.4? 1440 x 100/84 = 1714. Ah ha! So forget that 1620, the truth must be more like 1714 required VA supply for the 68100 at 14.4 and 100 output.
ISTR PD rates their converters at 13.6v too, which throws things off when trying to figure PD specs for 14.4v
EDIT--I thought the PF business was about how the "supply" had to deliver the VA (higher number) to make up for the PF of the load, so the load's "watts" is the lower number and not what the generator really has to supply. So the number we want is the VA "supply" needed.
Now I am unclear on whether that rated load watts is its input required or its output.
I recall with MPPT solar controllers they take the efficiency from "watts" out/"watts"in. Converters use "power" out/"power" in
the question now is "Which 'power' are we talking about? VA or Watts?
Whatever, I am quite sure we want the VA needed from the generator to decide if it will have enough supply to run the converter.
