I have searched around to find a way to vary the frequency of the PWM signal on an Arduino with not much luck (all i have found is the examples changing the prescaler (i need smaller incrimental changes then what is allowed from this method). This question has been asked before by other members with no real answers (i hope that its actually possible).
I can successfully change the duty cycle in a single phase DC scenario but when i develop my three-phase AC system i would like the ability to vary the speed of the motor via changes in frequency.
Can anyone help or has successfully been able to vary the frequency in small steps?