| T O P I C R E V I E W |
| ester |
Posted - Feb 26 2011 : 04:08:56 AM
hi.I want to build a circuit that inverter 9 v dc to 2000 v ac with 2wat power and frequency 1500 hz with IC 555 |
| 11 L A T E S T R E P L I E S (Newest First) |
| ester |
Posted - Mar 05 2011 : 11:03:08 AM
tanks alot. |
| audioguru |
Posted - Mar 04 2011 : 12:34:46 PM
quote:
Originally posted by ester
can u say me how i can eleminate high voltage loss ?
Replace the 555 with a CD4047 oscillator IC that has no voltage loss.
Replace the transistors with Mosfets that have a very low voltage loss.
Use a center-tapped transformer driven from a push-pull circuit.
Eliminate the coupling capacitor C4 and inductor L1.
Download Attachment:  Mosfets square-wave inverter.PNG
87.47 KB
 |
| ester |
Posted - Mar 04 2011 : 09:02:13 AM
can u say me how i can eleminate high voltage loss ? |
| audioguru |
Posted - Feb 27 2011 : 5:48:23 PM
quote:
Originally posted by ester
why garbage??????????????????????? i use a little 9V battery because it is my project that my teacher determined.
It is a garbage project because it has a high voltage loss as I explained.
I also showed that a little 9V battery is 9V only for a couple of minutes then its voltage quickly drops.
|
| ester |
Posted - Feb 27 2011 : 4:36:14 PM
why garbage???????????????????????i use a little 9V battery because it is my project that my teacher determined. |
| audioguru |
Posted - Feb 27 2011 : 11:36:45 AM
The circuit you found is garbage. It has too much voltage loss.
With a 9V supply, the output level of the 555 is about 3V peak and the output of the emitter-followers is about 2V peak. The inductor L1 feeding the transformer reduces the output level to 0.5V peak or less.
Why use a little 9V battery? The circuit will get a little warm so for an output of 2W the battery must supply about 2.2W if your transformer is perfect. Then the current from the battery is 2.2W/9V= 244mA and a little 9V battery voltage will drop to 7V in about 20 minutes.
Download Attachment: 9V alkaline, 250mA load.PNG
8.29 KB
 |
| ester |
Posted - Feb 27 2011 : 09:12:14 AM
i forget ,the waveform is not important.i should build the suitable transformer. |
| ester |
Posted - Feb 27 2011 : 09:09:45 AM
i have the total form of circuit but bigest problem is when i draw circuit in pspice softwave and change the value of eleman but give not correct response. i send circuit can u help me & say me what is the problem?
Download Attachment: DC-to-AC-with-IC.gif
8.17 KB |
| audioguru |
Posted - Feb 27 2011 : 08:49:55 AM
You are the person who needs a circuit, not me. So buy one, find one or design the circuit yourself. I will help you if you have trouble with your design. The biggest problem is finding a suitable transformer.
What are you powering with 2000VAC at 2W?
What waveform? (Square-wave or sine-wave) |
| ester |
Posted - Feb 27 2011 : 02:47:02 AM
tanks alot for message.but can you send me circuit ? |
| audioguru |
Posted - Feb 26 2011 : 10:28:32 AM
The max output current of a 555 is 200mA peak. With a 9V suppy its output voltage is about 3.5V peak.
Then its square-wave output power is only 200mA x 3.5V= 0.7W. So it must use a power amplifier to drive your stepup transformer. Then yje output power is 2 Watts.
The circuit is very simple. |
DC-to-AC-with-IC.gif