Chia sẻ trao đổi mọi vấn đề về AC Servo.

[Tuanlm]

Cái này làm thương mại thì tuyệt rồi. Còn làm để cho vui như mình thì thấy ngại.

@Nhatson:
"PWM control need Error amplifier, PFM control only need comparators.
maybe the feedback stability of PFM is better than that of PWM.
PWM ~
adv:
- fixed frequency (good for applications which need to aviod certain frequency band)
disadv:
low efficiency in light load condition

PFM ~
adv:
- higher efficiency in light load condition
- easy to implement cos no error amplifier is involved
disadv:
- wide frequency band (noise)"