| 摘要 |
At least one thyristor bridge (14) and communication chokes (7, 8 and 9) protecting the thyristors (1-6) thereof against excess current peaks supply the motor (12), e.g. a lift d.c. motor. In order to dampen noise, at least one series resonance circuit (16) is connected across the motor terminals and the commutation chokes (7, 8 and 9) incorporated in the circuit operate additionally as series damping chokes (15). <IMAGE> |
