| 摘要 |
The method involves a control unit (3) switching AC to either a forward-motion connection (Y1) and a triac (4), or a reverse-motion connection (Y2) and another triac supplying a different winding (L2) of each motor (1). Each triac connection to the neutral line (G) is taken through a current-limiting resistance (5), the opening contact of a limit switch (S1 or S2), and a diode (7) whereby a control capacitor (6) is charged to the peak voltage. |
