Technoman
Senior Member
Hi
Is anyone as experimented the pfm (pulse frequency modulation) to drive motors of a robot. According to an article of a swiss company (Didel), it has some advantages over the pwm.
Translated from french (original text http://www.didel.com/pic/PwmPfm- "The PFM is little known, because it is not supported (integrated) by the micro controllers and is not necessary for the good high-frequency motors. In robotics amateur on the other hand, PWM is not usable, because the motor would not start under 30 % (per example) of PWM and is soon going to set in at an important speed, 30 % of the maximum speed . With the PFM, we choose a duration of impulse been enough so that the brought energy exceeds the friction and makes move the motor. [...] Some irregular moves will be possibly visible, but the average speed will be proportional to the PFM value."
Is anyone as experimented the pfm (pulse frequency modulation) to drive motors of a robot. According to an article of a swiss company (Didel), it has some advantages over the pwm.
Translated from french (original text http://www.didel.com/pic/PwmPfm- "The PFM is little known, because it is not supported (integrated) by the micro controllers and is not necessary for the good high-frequency motors. In robotics amateur on the other hand, PWM is not usable, because the motor would not start under 30 % (per example) of PWM and is soon going to set in at an important speed, 30 % of the maximum speed . With the PFM, we choose a duration of impulse been enough so that the brought energy exceeds the friction and makes move the motor. [...] Some irregular moves will be possibly visible, but the average speed will be proportional to the PFM value."