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ESC question


(Richard) #1

@Rusty-What causes the short motor RPM burst when I kill power to the microprocessor supplying the pulse signal to the ESC? Any way I can stop that within my motor control program.

Thanks


(Rusty) #2

Richard,

If the microcontroller is mid-pulse on the PWM, then cutting power can provide a reduced pulse length to the ESC. For example, if you are sending 1500 and pull the power, it might get cut off at 1000, sending a valid signal to the ESC.

There are a few options.

  1. Turn off power to the thrusters at the same time.

  2. Stop sending pulses before shutting down power.

  3. Reduce pulse frequency (if you’re using faster than 50 Hz) to reduce the likelihood of a pulse getting cut short.

Best,

Rusty


(Richard) #3

Understand, thanks. It isn’t a big deal, more curious than anything.