AC mains frequency
- Thread starter cssc
- Start date
From the wikipedia article at:
http://en.wikipedia.org/wiki/Utility_frequency
In the late 19th century, designers would pick a relatively high frequency for systems featuring transformers and arc lights, so as to economize on transformer materials, but would pick a lower frequency for systems with long transmission lines or feeding primarily motor loads or rotary converters for producing direct current. When large central generating stations became practical, the choice of frequency was made based on the nature of the intended load. Eventually improvements in machine design allowed a single frequency to be used both for lighting and motor loads. A unified system improved the economics of electricity production, since system load was more uniform during the course of a day.
It has to do with the way generators were designed in the first place. From a practical perspective, the number of windings and the rpms at which these generators ran converged in the frequencies that you're mentioning. But the complete story might be a little more complicated than that.
Check this article, it provides some insight on the subject
Check this article, it provides some insight on the subject
low frequencies cause lights to blink. at the time high frequency equipment had more loss and was harder to build. while there were high frequency alternators like 18 khz at 250 kw, those were only used for radio transmission. and the 50 or 60 hz makes it easy to figure out gear ratios for clocks.
MaxHeadRoom
- Joined Jul 18, 2013
- 28,684
400Hz is used on aircraft in order to cut down the size on the magnetic devices and save weight.
Max.
Max.
