Hey Friends
I'm creating wireless energy transfer circuit for that I'm using inverter circuit to generate 150 kHz square wave signal.I have attached the circuit diagram.When i assembled the circuit,I gave 12 V DC power supply.However at the output i got a square wave of 6 V max Voltage.This means there is voltage drop across the mosfets. Please note I have used Mosfet IRFZ44N in the circuit and not IRLZ44n.
Please tell me how to get a square voltage with 12v max voltage

 

Do you have access to an oscilloscope to see just what is going on?

 

This is what I got on oscilloscope
It is ac square wave signal with vp=5v and Vpp=10v

 

Do you have access to an oscilloscope to see just what is going on?

this is what i got on oscilloscope
This is what I got on oscilloscope
It is ac square wave signal with vp=5v and Vpp=10v

 

One thing that caught my interest is the "gate pull down" resistors.

They should normally only be installed in the circuit when there is a possibility that the driver circuit can go in tree state mode, and it does not happen in this circuit.

R8 and R9 are actually mounted Drain-Gate, and try to pull the two top transistors on.

 

One thing that caught my interest is the "gate pull down" resistors.

They should normally only be installed in the circuit when there is a possibility that the driver circuit can go in tree state mode, and it does not happen in this circuit.

R8 and R9 are actually mounted Drain-Gate, and try to pull the two top transistors on.

I change the r8 and r9 resistors from gate to drain to gate to source
That didn't affect anything

 

What load is the FET bridge driving?

 

What load is the FET bridge driving?

The output of the inverter is directly Connected to oscilloscope
Otherwise will be connected to transmitting coil in series with a capacitor

 

The output of the inverter is directly Connected to oscilloscope

So the probe tip is connected to one output. Is the earth clip on the probe connected to the other output or the ground of the circuit?

 

So the probe tip is connected to one output. Is the earth clip on the probe connected to the other output or the ground of the circuit?

Yes that's what I did

 

Yes that's what I did

Which did you do: earth clip to the other output, or earth clip to circuit ground?

 

Earth clip to the other oitput

 

Now check with the earth clip connected to circuit ground and the probe tip to each output.

 

Why are you trying to transmit power as a square wave? Isn't a sine wave much more efficient at transmitting (I.e. Broadcasting) energy?

 

Why are you trying to transmit power as a square wave? Isn't a sine wave much more efficient at transmitting (I.e. Broadcasting) energy?

The load is a series rlc circuit which will make it into a sinewave

 

Hey Friends
I'm creating wireless energy transfer circuit for that I'm using inverter circuit to generate 150 kHz square wave signal.I have attached the circuit diagram.When i assembled the circuit,I gave 12 V DC power supply.However at the output i got a square wave of 6 V max Voltage.This means there is voltage drop across the mosfets. View attachment 123360 Please note I have used Mosfet IRFZ44N in the circuit and not IRLZ44n.
Please tell me how to get a square voltage with 12v max voltage

A 555 timer i think that is the most simple way or 2xTransistor oscilator:
About 555 this is a cool simulation which maybe will work for you http://www.falstad.com/circuit/e-555square.html
About transistors you can use this

 

A 555 timer i think that is the most simple way or 2xTransistor oscilator:
About 555 this is a cool simulation which maybe will work for you http://www.falstad.com/circuit/e-555square.html
About transistors you can use this

I have decided to used Royer oscillator
what do u think about royer oscillator

 

I have decided to used Royer oscillator
what do u think about royer oscillator

Jim Williams; appnote writer for LT, and NS at one time has covered the Royer in some detail, so those appnotes are worth studying.

https://www.google.co.uk/url?sa=t&r...es.php&usg=AFQjCNHzH7C2Ec0TmYpbQ2V3AqWDyb7PPA

 

The output of the inverter is directly Connected to oscilloscope
Otherwise will be connected to transmitting coil in series with a capacitor

For the driver to work you need a load. Put say a 100 ohm resistor where tou would normally put the coil. Then put the ground clip on ground and one probe on each side of the resistor.

 

For the driver to work you need a load. Put say a 100 ohm resistor where tou would normally put the coil. Then put the ground clip on ground and one probe on each side of the resistor.

For the driver to work you need a load. Put say a 100 ohm resistor where tou would normally put the coil. Then put the ground clip on ground and one probe on each side of the resistor.

I measured the voltage with the coil connected to circuit the results were same