| 摘要 |
<p>A synchronized asynchronous three-phase induction motor provided with a rotor fed by direct current with three star-connection windings (r1, r2, r3) connected to slip rings (S1, S2, S3), the current to the slip rings being transferred by means of carbon brushes (b1, b2, b3), the improvement consisting in that the conventional double rows of brushes on the slip rings are replaced by one single row of brushes of double width, the middle brush being divided into two (b21, b22), each thereof being connected to the positive (+) terminal of the supply voltage (V=) via a separate series resistor (R).</p> |
