双时基NE556定时器在三相电动机正反转控制电路中的应用

谭琦耀

Application of Dual Timebase NE556 Timer on the Control Circuit of Positive and Negative Rotation for Three-phase Motors

TAN Qi-yao

工业技术创新 . 2017, (1): 140 -142 . DOI: 10.14103/j.issn.2095-8412.2017.01.038