| View previous topic :: View next topic |
| Author |
Message |
hendi
Guest
|
 Posted: Fri Jun 27, 2008 1:10 pm Post subject: DC to AC inverter for pure sine wave |
 |
|
is anyone can help?...
is there any dc to ac converter (12Vdc to 220-240Vac) schema that produces 500W pure sine wave?
thanks in advance |
|
| Back to top |
|
 |
torbjorn
Joined: 07 Jun 2007
Posts: 370
Location: Sweden
|
| Posted: Mon Jun 30, 2008 8:08 am Post subject: |
|
|
Inverters delivering sine wave are fairly cheap today, so i don't think it is a very economic DIY project.
A good place for finding schematics is to look at the application notes at some power semiconductor manufacturer's websites. I.e. Fairchild, Intersil, Texas Instruments. |
|
| Back to top |
|
|
hendi
Guest
|
| Posted: Mon Jul 07, 2008 2:54 am Post subject: DC to AC inverter for pure sine wave |
|
|
thanks for your advice.
I've searched at local shop and found out that the inverter can not be used for driving a motor load. why?
I'm looking the inverter just because I have an ac motor where I want to give the power from acid battery not from ac power. |
|
| Back to top |
|
|
torbjorn
Joined: 07 Jun 2007
Posts: 370
Location: Sweden
|
| Posted: Mon Jul 07, 2008 6:50 am Post subject: |
|
|
Usually, it should not be a problem connecting a motor to an inverter. Maybe that particular inverter design has problems with voltage or frequency regulation when connecting a "live" load as a motor with inertia to it, or maybe it cannot supply the high inrush current needed by some kinds of motors.
What kind of motor is it? A commutator (universal) motor or an induction motor? Does it have any speed control or soft start facilities? What is the motor to be used for? |
|
| Back to top |
|
|
hendi
Guest
|
| Posted: Sat Jul 12, 2008 6:05 am Post subject: |
|
|
I've look at the inverter that it produces a suitable frequency (50Hz) to the motor. I'm not sure what kind of the motor, maybe a universal one. It doesn't have speed control. It is used to drive some gears making any seed (paper) to be a powder like.
one more thing. is the modified sine wave = sine wave? is that ok to drive ac motor? |
|
| Back to top |
|
|
torbjorn
Joined: 07 Jun 2007
Posts: 370
Location: Sweden
|
| Posted: Mon Jul 14, 2008 12:58 pm Post subject: |
|
|
| When inverter vendors talk about "modified sine wave", they usually mean a staircase wave. Most motors should be able to run fairly well on a such voltage, perhaps they make somewhat more noise or operate with somewhat lower efficiency than on a pure sine wave. |
|
| Back to top |
|
|
power
Joined: 11 Jul 2008
Posts: 4
|
| Posted: Tue Jul 15, 2008 8:51 am Post subject: |
|
|
Hi Torbjorn,
Your comments has really helped me. thanks!
_________________
http://www.powercomars.com |
|
| Back to top |
|
|
hendi
Guest
|
| Posted: Thu Jul 17, 2008 6:20 am Post subject: |
|
|
I will find the pure sine wave since I will use it for a long time. The price is quite significant different between them.
Thanks torbjorn. |
|
| Back to top |
|
|
John_audson
Joined: 11 Aug 2008
Posts: 2
|
| Posted: Mon Aug 11, 2008 5:38 am Post subject: |
|
|
Hi Torbjorn,
Thanks for sharing this information.
_________________
Audience Response Solution |
|
| Back to top |
|
|
|
|
|
FAQ
