12.05.2014 Views

Automating Manufacturing Systems - Process Control and ...

Automating Manufacturing Systems - Process Control and ...

Automating Manufacturing Systems - Process Control and ...

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

continuous actuators - 24.6<br />

ASIDE: A PWM signal can be used to drive a motor with the circuit shown below. The<br />

PWM signal switches the NPN transistor, thus switching power to the motor. In this<br />

case the voltage polarity on the motor will always be the same direction, so the<br />

motor may only turn in one direction.<br />

signal<br />

source<br />

V+<br />

DC motor<br />

V+<br />

V-<br />

power<br />

supply<br />

com<br />

Figure 24.5<br />

PWM Unidirectional Motor <strong>Control</strong> Circuit

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!