Making a DC to AC converter   - Page 1
Forum section: electronics / beginners

author: yashrk
author_rank: Frequent Contributor
timestamp: March 02, 2014, 10:26:58 am
content: I don't have any prior knowledge on this topicso any input is appreciate, I want to convert battery's DC volts in to AC (240V @50Hz).

author: AlfBaz
author_rank: Super Contributor
timestamp: March 02, 2014, 10:35:23 am
content: You could start by searching "inverter" or "power inverter"

author: yashrk
author_rank: Frequent Contributor
timestamp: March 02, 2014, 10:53:24 am
content: I tried but that stuff gets hard pretty quick

author: VK5RC
author_rank: Unknown
timestamp: March 02, 2014, 12:22:29 pm
content: I think of them as a funny combined boost and really buck (inverted) switch mode supply where the controller instead of switching at kilohertz, switches at 4-6 times the mains frequency to "maintain" a sinusoid profile.

author: Rasz
author_rank: Super Contributor
timestamp: March 02, 2014, 12:33:25 pm
content: do you need one for something? or just want to build one to learn about the subject?if you need one to power something just buy one or get an UPS and mod it

author: firewalker
author_rank: Super Contributor
timestamp: March 02, 2014, 01:24:45 pm
content: What kind o AC? Square wave? Pure sine? Modified sine?http://en.wikipedia.org/wiki/Power_inverterFor a pure sine, the easiest way would be with sine modulated PWM. I used this method to build a really simple pure sine inverter for my students. Just an AVR, couple MOSFETs and an old UPS transformer. I also wrote a quick and dirty python script to generate the PWM table.It's in Greek language, but it could be useful:Sine wave from PWM

author: mdszy
author_rank: Unknown
timestamp: March 02, 2014, 07:34:37 pm
content: Quote from: yashrk on March 02, 2014, 10:53:24 amWell no shit. Do you expect everything to be written for people who have no experience?

author: electronics man
author_rank: Frequent Contributor
timestamp: March 02, 2014, 08:43:58 pm
content: how about a transformer whith a mosfet in series on the lowside of the primery of a transformer and the gate is conected to a tap on the secondary, its not pure sine but it is AC.

author: AmmoJammo
author_rank: Frequent Contributor
timestamp: March 02, 2014, 08:49:53 pm
content: The simplest inverter circuit I've seen...I wouldn't actually build or use it though...http://aaroncake.net/circuits/inverter.asp

author: Rigby
author_rank: Super Contributor
timestamp: March 03, 2014, 12:49:58 am
content: Quote from: mdszy on March 02, 2014, 07:34:37 pmDude, come on. Is that necessary?

author: G7PSK
author_rank: Super Contributor
timestamp: March 03, 2014, 09:07:44 am
content: It is not really economical to build your own inverter these days. This is especially so if you have to source a large transformer, most of the modern units convert the LT DC to hf and use a hf transformer to convert the power to about 400 volts rectified to DC and then convert that to either modified or sine (ought to be called modified or wonky square) wave. I don't know about elsewhere in the world but here in the UK by the time you have just sourced the housing the cost is higher than a complete Chinese modified sine unit retail.

author: yashrk
author_rank: Frequent Contributor
timestamp: March 04, 2014, 07:33:45 am
content: Thanx guys for your input, I was actually very curious about it that how it will work..But as many of u suggested I will just choose some off the shelf solution for it. Thanx again.