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    Buck converter. Timestep too small, error in proteus

    Hi,
    I was trying to design a buck converter as shown in the attached file. When I simulate the converter design in proteus with PWM generated by ATmega32 it is giving a error
    "Timestep Too Small"
    Can you please try to help me with this.
    Attached: Schematic of the converter and the screen shot of the error message.
    Thank you. :)

    - - - Updated - - -

    The switching frequency used is 1.96kHz

    •   Alt11th June 2012, 10:21

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    Re: Buck converter. Timestep too small, error in proteus

    The timestep is on the order of 1.8 x 10 ^ -19. I suppose the unit is seconds?

    This is very slow. I can see it taking weeks to run, and generating a log of results that fills an entire hard disk.

    I don't know how to speed up the time step. Can you find a way to set it faster? Maybe around 10 ^ -6 (a millionth of a second). That's several hundred times your frequency of operation.



    •   Alt11th June 2012, 18:59

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    Re: Buck converter. Timestep too small, error in proteus

    Can you post your schematic?



    •   Alt12th June 2012, 07:18

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    Re: Buck converter. Timestep too small, error in proteus

    Quote Originally Posted by BradtheRad View Post
    The timestep is on the order of 1.8 x 10 ^ -19. I suppose the unit is seconds?

    This is very slow. I can see it taking weeks to run, and generating a log of results that fills an entire hard disk.

    I don't know how to speed up the time step. Can you find a way to set it faster? Maybe around 10 ^ -6 (a millionth of a second). That's several hundred times your frequency of operation.
    Yes make as faster as it can be in my case I have changed it to 50p sec when i had encounterd



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