| 摘要 |
The invention relates to a changeover switch for changing between two current paths (1, 2; 3, 4) of a DC circuit that comprises in every current path a bridge contact system (110, 120; 230, 240) with two contact paths (111, 112; 121, 122; 131, 132; 141, 142) and one bridge conductor (113; 123; 133; 143). Said bridge conductors of the two current paths (1, 2; 3, 4) that are alternatively closed are insulated from one another while they are actuated by a common solenoid system (EM1, EM2). The inventive changeover switch is advantageously used as a polarity reverser in a so-called H-bridge circuit for motor drives with alternating sense of rotation. |
