lsls00@iliad.kodak.com (Ilia Levi) (03/07/91)
As many of you probably heard, Rochester, NY area had a very bad ice storm and many houses were left without electrical power for several days. Does anybody know of any circuits for a 12VDC to 110VAC converters? If they were published in any magazines? I am sure that by the time I'll get a reply, the emergency will be over, but it's always good to be prepared for the next time. Thanks, Ilia levi@kodak.com
commgrp@silver.ucs.indiana.edu (BACS Data Communications Group) (03/07/91)
lsls00@iliad.kodak.com (Ilia Levi) writes: >...Does anybody know of any circuits for a 12VDC to 110VAC >converters? If they were published in any magazines? >I am sure that by the time I'll get a reply, the emergency will be over, >but it's always good to be prepared for the next time. > >Thanks, Ilia levi@kodak.com See _Radio Electronics_, April 1991, p.43. (I got my subscription copy 2 days ago; should be on newsstands soon.) This interesting design has "modified sine-wave" output (actually, 4-step square wave), uses paralleled power FETs to drive a conventional 12-volt filament transformer in reverse. It's regulated by feedback from the output. It runs at 75 instead of 60 Hz to avoid saturating the transformer; the frequency won't matter in most applications. It's only 40 watts but could probably be scaled up by using more FETs and a bigger transformer. Most or all of the parts are available from Radio S***. -- Frank Reid reid@ucs.indiana.edu
grege@gold.gvg.tek.com (Greg Ebert) (03/08/91)
In article <1756@eastman.UUCP> lsls00@iliad.kodak.com (Ilia Levi) writes: >As many of you probably heard, Rochester, NY area had a very bad >ice storm and many houses were left without electrical power for >several days. > [...] If you're in an urban area, dismiss it as a fluke. Probably won't happen again. But if it happens again, race down to your nearest equipment rental yard ! I live in a rural area, so a generator is the best standby source of electricity. I got a new 5kW unit for less than $500. I can run my whole house on it without fussing with extension cords, etc. It is impossible to buy/construct and operate a battery/inverter system with an equal rating as a generator, especially if you are without electricity for several days.