Hi everyone,
from last some days i am working on a circuit which converts the dc voltage into the ac. In the circuit is used astable multivibrator for generate the PWM to operate the mosfet. I used totem pole circuit drive the gate of mosfet. The problem is don't know what to do next. I know the principle of induction coil and start working to design a induction coil, i designed the switching circuit and generates the frequency but next step is to make circuit to convert dc voltage into ac which going to flow in coil for induction, i want to do this by using only two mosfets. I know a circuit which suitable for my application( In this circuit the center tapping coil is used. but I don't want to use extra inductor coil for circuit. I am looking something like H bridge circuit for change the polarity of the supply. If anyone know about that please let me know.
Here i found a circuit for same application, i tried but didn't understand the complete working of that circuit : https://1drv.ms/i/s!Ao-7jX45jaA4gaxPramT7a1BKNuIRA?e=xQxXNx

 

Hi
You already have a Thread on this topic which has been Closed.

Is this new Thread in any way discussing Free Energy or Over Unity Projects.?

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Hi
You already have a Thread on this topic which has been Closed.

Is this new Thread in any way discussing Free Energy or Over Unity Projects.?

Moderation.

Yes, this is new Thread for new circuit.

 

Hi Pradeep,
Free Energy or Over Unity Projects are not allowed on AAC Forums.

Moderation.

 

Hi Pradeep,
Free Energy or Over Unity Projects are not allowed on AAC Forums.

Moderation.

I didn't understand can you please explain?

 

Hi Pradeep,
Free Energy or Over Unity Projects are not allowed on AAC Forums.

Moderation.

I take a reference circuit of buck converter i need to change input voltage range of this circuit, can you help me in that ?
and i tried to simulate but in simulation its doesn't work. Can you know the circuit problem?

 

I take a reference circuit of buck converter i need to change input voltage range of this circuit

1) Please post a link to that reference circuit.
2) What is the present input voltage range and what is the range you want?
3) What is the intended output voltage?

in simulation its doesn't work

With L1 connected to the circuit ground that's not surprising!

 

The UC3842 isn't good for Buck regulators. It would make a good boost regulator, or even a SEPIC, but not a buck.

 

1) Please post a link to that reference circuit.
2) What is the present input voltage range and what is the range you want?
3) What is the intended output voltage?

With L1 connected to the circuit ground that's not surprising!

INPUT VOLTAGE RANGE IS 36V TO 80 VOLT AND OUTPUT IS FIX 12VOLT/3A.
IT IS A BUCK CONVERTER INSTALLED IN ELECTRICK SCOOTY, ITS CHINIES PRODUCT.
"With L1 connected to the circuit ground that's not surprising!" Yes, me also, but in simulation i checked i will not work without that connection.
I design another circuit by studying the datasheet of the ic, i have a doubt, in datasheet there is mestioned input voltage range is 12v-30v. and in simulation when i check the vcc pin have 100 volt when input volt is 100v. Please have look on circuit and help to solve this issue. output will be ok. but vcc pin of ic having high voltage and in simulation it works properly. Can i move to make prototype for this circuit for test it in real life?
The circuit diagram and output is in attachment.

 

The UC3842 isn't good for Buck regulators. It would make a good boost regulator, or even a SEPIC, but not a buck.

thanks for suggestion, i chooses lt1241 for that.

 

Why are you applying 100V to the Vcc pin of the LT1241? The Absolute Maximum is specified as 25V !
In the application circuit in the datasheet the offline Vcc voltage is limited by a 15V zener.

 

Why are you applying 100V to the Vcc pin of the LT1241? The Absolute Maximum is specified as 25V !
In the application circuit in the datasheet the offline Vcc voltage is limited by a 15V zener.

i tried by voltage divider and 30 volt zener diode but in that case the output is not come( output will become 100-500 microvolt). please suggest a circuit for power up the LT1241 ic. input voltage range is 30v to 100v.