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  1. Alec_t

    help with IR2110 chips

    Not the Appdata folder. Look in your Documents folder (as the instructions in that post #116 attachment indicate).
  2. Alec_t

    help with IR2110 chips

    uf5408 and IRF640 should be ok.
  3. Alec_t

    help with IR2110 chips

    From the datasheet, Vcc is in the 10-20V range. If in doubt, always check the datasheet.
  4. Alec_t

    help with IR2110 chips

    Look in the Regulator folder for the 7805. If your Vdd is 5V, Von in the P1 and P2 settings should be 5V too, not 3.3V.
  5. Alec_t

    help with IR2110 chips

    Change the gate-source resistors (R3,R4,R7,R8) to something much higher (e.g. 10k, which works ok in my simplified sim). With the present 1k, each bootstrap capacitor is discharging rapidly and the gate-source voltage is insufficient to keep the high-side MOSFET conducting; hence the spurious...
  6. Alec_t

    help with IR2110 chips

    There are several ways to add third party models to LTS. Here's one :- __Copy the sub and asy files to a folder of your choice. __Go to Tools/Control Panel. __Click the magnifying glass icon. __Add your chosen folder to the paths for the model file (.sub) and its symbol (.asy). LTS should then...
  7. Alec_t

    help with IR2110 chips

    Here are my model files (zipped .sub and .asy). The IR2110 model is one I created years ago because the 'official' one ran incredibly s-l-o-w-l-y, or not at all. I don't have the IRF640 model, so I used a similar one from the standard LTS library. Here's a simplified version of your sim using my...
  8. Alec_t

    help with IR2110 chips

    No. That 'noise' shouldn't be there, and certainly not at only node N008. Nodes N007 and N008 (i.e. the two half-bridge outputs) should have near-identical waveforms. Double-check all connections/values. You can't, unless you change the IR2110 model. I note that the pinout and symbol of yours...
  9. Alec_t

    help with IR2110 chips

    It's a Spice .param directive (command), entered as such directly on the schematic, using the .op tool at the end of the toolbar. The curly brackets tell LTS to calculate the contents, using values and parameters which have already been defined. Your post #86 defines the pulse parameters...
  10. Alec_t

    help with IR2110 chips

    Yes, you can use those numbers. They can be tweaked later if you like. A big advantage with simulation is the opportunity for "I wonder what will happen if I change this to ......", without the risk of letting the magic smoke out of real-world components.
  11. Alec_t

    help with IR2110 chips

    Ok. So dead-time needs to be greater than that. A practical value would be, say, 1us, providing some headroom to ensure no overlap between high and low sides conducting. Since your pulse period is 20ms, you can be a bit more generous with the dead-time if you wish. Pulse rise and fall times need...
  12. Alec_t

    help with IR2110 chips

    Don't concern yourself with RMS. The PULSE source merely switches between two voltage levels (Vinitial and Von).
  13. Alec_t

    Electric Scooter Battery Voltage Display

    Welcome to maker.pro! What battery tester? Make/model/specification?
  14. Alec_t

    help with IR2110 chips

    1H/(4.2)² = 57mH 1.8nF seems more likely for a power MOSFET. Multiply that by the sum of the drive circuit output impedance and any resistor in series with the FET gate to get the time constant. An alternative calculation you can do is work out the time taken to charge the 'Total gate charge'...
  15. Alec_t

    help with IR2110 chips

    I'm just guessing, but I'd think the high voltage winding of your transformer could well be in the order of 1 Henry. You can use that value for the sim, and calculate the inductance of the low-voltage winding. This article may help with modelling the motor. In post #56, the .tran 100m is a...
  16. Alec_t

    help with IR2110 chips

    Here's an example of generating anti-phase signals with dead-time defined by the dt parameter:-
  17. Alec_t

    help with IR2110 chips

    You enter the primary inductance value (if known, or your choice), then use the inductance ratio to calculate the secondary inductance and enter that.
  18. Alec_t

    help with IR2110 chips

    My sim experience with transformers is limited to starting with a turns ratio and squaring that to get an inductance ratio (which is what Spice needs), then guestimating coil resistance values. For a rough idea of dead-time, look at the total gate capacitance value given in the datasheet for the...
  19. Alec_t

    help with IR2110 chips

    Are you asking for those values just for the simulation, or are you actually building the circuit? For simulation only, the resistor power ratings and cap voltage ratings are irrelevant and using the default diode will be ok to get the sim running. You can worry about the values later. Once you...
  20. Alec_t

    help with IR2110 chips

    There are lots of 1kV fast-recovery diodes available (see e.g...
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