I have questions about transformers and frequency converters. First, I think I have a decent knowledge of how transformers work, but there is one thing I'm still unsure about. Transformers are rated as either step up or step down as described by the primary versus the secondary ratings. For example, 440/110 would be a 4:1 step down transformer. This makes sense since 440/110 = 4. However, I've seen various other ratings, such as 440/120, 240 X 480, 230 X 460 primary and 120/115/110 secondary which don't make sense to me. For example, 440/120=~3.67, not 4, so would this still be considered a 4:1 transformer? And what about the 240 X 480? Does the "X" denote the options at that particular terminal point?
Let's take this a step further and say, as an example, I want to go from a 440VAC to a 120VAC, 60 Hz, single phase with a 3kVA carrying capacity. What are my options? Would every primary rating equal to or above 440VAC with a secondary equal to or below 120VAC work? Why or why not?
Note: I'm aware of the transformer section available on allaboutcircuits. I'm looking for specific information though. I browsed through the first few pages of the e-book material but didn't find the answers I was seeking.
Now let's shift focus to my next question about frequency converters. First off, how does one even perform a simple frequency conversion using discrete components? Say I want to go from 60Hz to 400Hz, without changing my voltage, current, phase, etc... If I just want to change the frequency, would I use an LC network? I've looked at frequency converters online and they mostly appear to be expensive and very large units intended for not only changing frequency but also voltage and current. Would it be easy to build my own frequency converter if I only wanted to increase the frequency (single phase)?
Thanks in advance!
Let's take this a step further and say, as an example, I want to go from a 440VAC to a 120VAC, 60 Hz, single phase with a 3kVA carrying capacity. What are my options? Would every primary rating equal to or above 440VAC with a secondary equal to or below 120VAC work? Why or why not?
Note: I'm aware of the transformer section available on allaboutcircuits. I'm looking for specific information though. I browsed through the first few pages of the e-book material but didn't find the answers I was seeking.
Now let's shift focus to my next question about frequency converters. First off, how does one even perform a simple frequency conversion using discrete components? Say I want to go from 60Hz to 400Hz, without changing my voltage, current, phase, etc... If I just want to change the frequency, would I use an LC network? I've looked at frequency converters online and they mostly appear to be expensive and very large units intended for not only changing frequency but also voltage and current. Would it be easy to build my own frequency converter if I only wanted to increase the frequency (single phase)?
Thanks in advance!