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Proteus Simulation Error - BLDC motor controller

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idirfa

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I am trying to simulate a BLDC motor controller, using Proteus 8. I have tried doing everything but couldn't solve the error, "time-step too small". I have attached the simulation and hex file here, looking forward to experts here helping me out. View attachment ReCYK - Controller.rar
 

I don't know Proteus but that error message is a frequent topic here. Look among the menu for a command to change the timestep. Increase it in steps of 10x until you get a successful run.
Do you have an AC or pulsed waveform? A reasonable timestep is between 1/500 and 1/50 of one of your cycles.
 

Often this error is due to a earth not connected. I can't see your circuit.
 



The above is the schematics
 

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Try connecting a 10Mohm resistor to VS to ground, on all of the three chips, (not needed on the real circuit only for simulation)
 

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