Speed control system with current negative feedback
Source: InternetPublisher:aytwartoofyoroo Keywords: Speed control system error amplifier Updated: 2020/07/01
Another improved solution is to introduce the current feedback signal at the summing point of the error amplifier
and add a current feedback loop. See picture for this plan. In the L292 circuit , the current proportional to the average current of the motor flows through the external circuit
between pin 5 and pin 7. As
shown in the figure, the sample is sampled from the 510fl resistor, amplified and adjusted by an operational amplifier, and then sent
to the error amplifier . 2 feet. The feedback coefficient is set by the potentiometer RP. Properly adjusting
RP can suppress the impact of load current on speed.
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