| 摘要 |
<p>The circuit has a braking resistance (12) and a series braking thyristor (13). The electric drive has a single-phase network rectifier with a bridge circuit having two series rectifier diodes (1, 2), two series main thyristors (3, 4) in parallel with these and two further series extinction thyristors (5, 6) also connected in parallel. A switching capacitor (7) is connected between the two latter and the two main thyristors (3, 4). The braking resistance (12) and braking thyristor (13) are coupled across either of the main thyristors (3, 4), so that during braking the bridge circuit acts as a thyristor regulator for the braking resistance (12).</p> |
