Hello!
I have a custom-built single phase permanent magnet synchronous motor that I would like to drive with a sinusoidal current wave as a variable frequency drive.
The current wave needs to have an amplitude between 3-8 A which I could adjust for a range of voltages by varying a series resistor in-line with my coil windings. It must be of adjustable frequency with an accuracy of 0.01 Hz or better.
From my understanding, the questions I need to ask are:
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Can the refresh rate of the microstepping be fast enough so that I’ll be able to differentiate between a sine wave of 100.00 Hz and of 100.01 Hz? I’m using the STM32F411 MCU at a clock speed of 72 MHz if that helps.
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I’ve seen forum posts elsewhere state that you can increase the current output for a single phase by wiring the two phases from the bipolar driver in parallel - can this be done with this driver?
I’m trying out sinusoidal pulse width modulation on the 24v13 (Pololu 2992) but I figured it wouldn’t hurt to look at this board as a backup in case the accuracy isn’t what I want it to be
Thank you,
Nick