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Motor[i].PwmSf IDE setup calculation question
#2
Some amplifiers require that the PWM signal actually switch to continue to function properly. If we allow a 100% duty cycle by setting Motor[x].PwmSf to a value of 16,384 or higher, there may be an issue. Delta Tau Amplifers with this issue should fault out, but you might as well be safe.

For amplifiers without this limitation, PwmSf can be set higher and there is actually a reason to do so. For 3-Phase motors we like to use a feature called third harmonic injection. This lowers the voltage of the peak of a sine wave, but keeps it near the peak longer. PwmSf can be set higher to get back to the expected voltage. If it is set higher than 16,384 that means we are allowing voltage saturation for some part of a sine wave (this only really matters at speed).

The GPL 102 shows a maximum of 90% of 16,384 in the hardware specific manual and that should be used. It looks like there is an issue in system setup we will be looking into.
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RE: Motor[i].PwmSf IDE setup calculation question - Eric Hotchkiss - 03-18-2019, 12:10 PM

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