All About Circuits Forum  

Go Back   All About Circuits Forum > Electronics Forums > General Electronics Chat

Notices

General Electronics Chat Discussion forum for general chat about anything electronics related, including asking questions about material in the All About Circuits E-book, Worksheets, and Videos.

Closed Thread   Post New Thread
 
Thread Tools Display Modes
  #1  
Old 07-19-2009, 02:17 PM
jeffwong jeffwong is offline
New Member
 
Join Date: Jul 2009
Location: Malaysia
Posts: 9
Send a message via MSN to jeffwong
Default Pure sine wave inverter

I have a Pure Sine Wave Inverter design circuit diagram, but the output is too small, which is 120Vac from 12Vdc input.My desire output is 240Vac from 12Vdc input. Please give me some advice that how i can modify the circuit to increase the output voltage ?
The supply voltage to the Mosfet(VDD) is 170Vdc, this make me difficult because the power supply input to the inverter is only 12Vdc. What can i do so that i can supply 12Vdc instead of 170Vdc to the Mosfet?
Attact with the circuit desig diagram.


Thanks........
Attached Images
File Type: gif Inverter.gif (50.7 KB, 318 views)
  #2  
Old 07-19-2009, 02:34 PM
beenthere's Avatar
beenthere beenthere is offline
Senior Member
 
Join Date: Apr 2004
Location: Missouri, USA (GMT -6)
Posts: 15,815
Blog Entries: 10
Default

The inverter's output will have to be applied to a transformer for the output voltage increase. For a 240 volt output, the transformer will have a greater number of turns in the secondary than a transformer that gives a 120 VAC output.

Are you aware that the power out of an inverter is a product of voltage and current? That same power must be driven in the transformer input from those 12 volt batteries. For a 1000 watt output and no losses (not possible), the batteries must supply 83.3 amps of current.

For a square wave inverter, the drivers can be switched very quickly so they do not heat. For a sine wave inverter, the ohmic heating becomes a major problem. That means more drivers in parallel, huge heat sinks, and, probably, fans to control the waste heat.

I am not sure what your circuit will do - it is too small to read.
__________________
First comes the hardware, then the software.
  #3  
Old 07-19-2009, 03:24 PM
millwood
Guest
 
Posts: n/a
Default

with that particular topology, your output is limited to Vdd. if you want higher output voltage, you should look for a different topology, for example, flyback.

with a flyback, you can power both Vcc / Vdd from 12v and output 240v.
  #4  
Old 07-19-2009, 04:18 PM
Bill_Marsden's Avatar
Bill_Marsden Bill_Marsden is offline
Super Moderator
 
Join Date: Mar 2008
Location: Dallas, TX (GMT-5 w/ DST)
Posts: 19,022
Blog Entries: 5
Default

Just to make it a little easier to read, I rotated it.
Attached Images
File Type: png temp.PNG (73.2 KB, 231 views)
__________________
..
"Good enough is enemy of the best." An old engineering saying, Author unknown.

General info:
If you have a question, please start a thread/topic. I do not provide gratis assistance via PM nor E-mail, as that would violate the intent of this Board, which is sharing knowledge ... and deprives you of other knowledgeable input. Thanks for the verbage Wookie.
  #5  
Old 07-20-2009, 08:35 AM
jeffwong jeffwong is offline
New Member
 
Join Date: Jul 2009
Location: Malaysia
Posts: 9
Send a message via MSN to jeffwong
Default Pure Sine Wave Inverter

Im not like to use transformer, i would like to modify the circuit design. What can i do in this circuit design to increase the output voltage from 120Vac to 240Vac output?
The inverter will use in household, mostly will use car battery to supply the 12Vdc to the inverter.
If i want to increase the output voltage, am i need to incease the supply voltage to the Mosfet(VDD) ?
What software have the Mosfet Driver component so that i can do simulation?
  #6  
Old 07-20-2009, 08:37 AM
jeffwong jeffwong is offline
New Member
 
Join Date: Jul 2009
Location: Malaysia
Posts: 9
Send a message via MSN to jeffwong
Default Pure Sine Wave Inverter

Dear millwood:
What is flyback?
Is that one type of Inverte. Could you send me a circuit diagram to me?


Thanks.......
  #7  
Old 07-20-2009, 08:41 AM
jeffwong jeffwong is offline
New Member
 
Join Date: Jul 2009
Location: Malaysia
Posts: 9
Send a message via MSN to jeffwong
Default Pure Sine Wave Inverter

Dear Bill_Marsden:
Izit the circuit diagram very blur?





Thanks..........
Attached Images
File Type: gif Inverter Circuit Diagram.gif (50.7 KB, 149 views)
  #8  
Old 07-20-2009, 12:37 PM
Bill_Marsden's Avatar
Bill_Marsden Bill_Marsden is offline
Super Moderator
 
Join Date: Mar 2008
Location: Dallas, TX (GMT-5 w/ DST)
Posts: 19,022
Blog Entries: 5
Default

Quote:
Originally Posted by jeffwong View Post
Dear Bill_Marsden:
Izit the circuit diagram very blur?
No, the schematic is quite good. But when I trace something like that I start from my left and go right. Most schematics do. Going up and down feels unnatural. It's a personal preference, but one shared by many people.
__________________
..
"Good enough is enemy of the best." An old engineering saying, Author unknown.

General info:
If you have a question, please start a thread/topic. I do not provide gratis assistance via PM nor E-mail, as that would violate the intent of this Board, which is sharing knowledge ... and deprives you of other knowledgeable input. Thanks for the verbage Wookie.
  #9  
Old 11-06-2009, 10:51 AM
ezeebube ezeebube is offline
New Member
 
Join Date: Oct 2009
Location: Lagos,Nigeria
Posts: 7
Default

Hey guys,considering the schematic posted by Jeffwong,how can this circuit be connected to a transformer?Will the two outlets from the two IR2110 ICs be used as signals to Mosfets?(I'm considering how it is done in a square wave version)Do you think that this diagram is perfect?Please i need your answers.
  #10  
Old 11-06-2009, 12:18 PM
beenthere's Avatar
beenthere beenthere is offline
Senior Member
 
Join Date: Apr 2004
Location: Missouri, USA (GMT -6)
Posts: 15,815
Blog Entries: 10
Default

The circuit is very incomplete, so who can say if it is functional? You also have another thread open on this topic.
__________________
First comes the hardware, then the software.
Closed Thread   Post New Thread

Tags
, , ,


Related Site Pages
Section Title
Worksheet Design Project: Power inverter
Worksheet CMOS logic gates
Worksheet Power conversion circuits
Worksheet Design Project: Simple component curve-tracer circuit
Worksheet Mixed-frequency signals
Textbook The "operational" amplifier : Operational Amplifiers
Textbook Other waveshapes : Mixed-frequency Ac Signals
Textbook Class B audio amplifier : Analog Integrated Circuits
Textbook Half-wave rectifier : Discrete Semiconductor Circuits
Textbook Rectifier circuits : Diodes And Rectifiers


Similar Threads
Thread Thread Starter Forum Replies Last Post
Building a 3 Phase Sine wave inverter Celcius1 The Projects Forum 7 09-18-2011 04:37 PM
120v 60Hz Sine Wave low power inverter peterb33 The Projects Forum 3 06-13-2009 07:23 PM
Need Pure Sine Wave Inverter rangoju123 The Projects Forum 2 04-08-2009 03:52 AM
triangular to sine wave kahafeez The Projects Forum 13 12-16-2008 07:27 PM
changing a modified sine wave to true sine wave using simulink hyde6666 The Projects Forum 0 07-15-2008 06:35 PM

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 11:07 AM.


User-posted content, unless source quoted, is licensed under a Creative Commons Public Domain License.
Powered by vBulletin
Copyright ©2000 - 2014, vBulletin Solutions, Inc.