I made a simple 4x IRF3205 H Bridge for testing some thing out, the breadboard works well, but can't simulate on Proteus.
The schematic and error message attached, please help.
Again, the text is too small to read.
This is not how to make a H bridge.
The bottom MOSFETs, (Q2, Q4) have a Gate to Source voltage of 0 or supply voltage. (can't read what the supply is) The MOSFETs have a G-S max voltage of 20V. In spice this is not a problem but in real life 24V will kill parts.
The top MOSFETs are driven wrong. They are not turned on well. If the Gate is pulled up to 24V then the source will only be at 19V.
We do not know what the two switches are doing. From what we know, of your circuit we can not tell if all the FETs are off or all are on or what.
"too much CPU load" probably is: spice can not get started. It does not know the starting condition.
Please do not save and post your schematic as a fuzzy tiny JPG file type. Even when I enlarged it I cannot read the text. Make the schematic much larger and use PNG file type instead that is very clear.
How many volts does the motor need?
What is the voltage of the upper Mosfets drains?
What is the voltage of the Mosfets gates?
What is the voltage at the left motor wire?
What is the voltage at the right motor wire?
Do you know why the upper right Mosfet is barely turned on?
I see that there are junction spots where the four resistors connect to the gate wires. Also where the motor connects to the vertical wires running between the upper and lower mosfets. But I do not see junction spots were the gnd symbol connects to the wire connecting to the source pins of the lower mosfets, nor where the +12V connects to the drains o the upper mosfets.
So, I wonder if you have a power connection problem.
I see that there are junction spots where the four resistors connect to the gate wires. Also where the motor connects to the vertical wires running between the upper and lower mosfets. But I do not see junction spots were the gnd symbol connects to the wire connecting to the source pins of the lower mosfets, nor where the +12V connects to the drains o the upper mosfets.
So, I wonder if you have a power connection problem.
Please do not save and post your schematic as a fuzzy tiny JPG file type. Even when I enlarged it I cannot read the text. Make the schematic much larger and use PNG file type instead that is very clear.
How many volts does the motor need?
What is the voltage of the upper Mosfets drains?
What is the voltage of the Mosfets gates?
What is the voltage at the left motor wire?
What is the voltage at the right motor wire?
Do you know why the upper right Mosfet is barely turned on?
Thank you. I'll improve the picture.
How many volts does the motor need?
24V
What is the voltage of the upper Mosfets drains?
??
What is the voltage of the Mosfets gates?
20V
What is the voltage at the left motor wire?
??
What is the voltage at the right motor wire?
??
The '??' need to get next time test.