History of Inverters

What kind of street lights and how many?

Here is one possible solution.

Convert your streetlights over to the high powered compact fluorescents! I see they are making them running wattages over 200 watts now. (1000 watt incandescent equivalent light output) The larger ones have similar light output ratings as most HID type bulbs of the same wattage!

They may not be listed as being DC operable but I have yet to find a brand or model that doesn't work on a DC voltage a little higher than its AC voltage rating. Many will work well on even far less too! They use a small inverter circuit that takes the incoming AC power rectifies it to DC and then changes that DC back into high frequency AC that powers the bulb itself.

For reference, If your line power is say 120 volts they will typically run at full output from 130 -185 volts without problems. Just set up your battery system to run above 130 volts at its lowest charge voltage and below about 185 while charging and you would be good to go!

Plus by skipping the low frequency inverter and ballast system that would be needed to run typical street lights you will pick up a considerable amount of system efficiency as well!

Its just a thought!

The only reason I can see why you would want to use a SG3524 pulse width modulating control chip as a step up DC to AC inverter for this particular application is because this is a school project (hence making this a homework question).

explain with circuit diagram?

The information is readily available off the manufacturer website(s).

If this isn't a homework question, don't bother using this chip (especially if it is for standard high pressure sodium street lights), instead buy a simple, reliable and inexpensive switch mode DC to AC converter suitable for the application.

tell me the history of how and where inverters started?

Is this general interest or another part of the homework assignment?

Google 'inverter history', also http://en.wikipedia.org/wiki/Inverter_(electrical)

dekkyiane; inverters were used back in the 1930's to raise 6 volts Direct current to 375 volts for car radios at a frequency of 115, or what ever voltage you wanted. perry

Hello dekkyjane,

What details have you found yourself? Inverters were invented a long while ago you know. You should really do a search before asking here about your inverters etc. It is amazing what you find on-line. Just a gentle leg-pull, OK?

Take care and good luck.