| 摘要 |
1,060,317. Electric motor control systems. HANS STILL G.m.b.H. May 14, 1964 [May 15, 1963], No. 20207/64. Heading H2J. [Also in Division H3] A commutating circuit for a D.C. load comprises a motor 7 in series with a thyristor 1 having an extinguishing circuit including a capacitor 3, a second thyristor 2, with an inductance 5 and a third rectifier 4 connected across the thyristor 2. Connected in the main circuit is an air cored choke 8, the stored energy from which supplements the voltage from the source B for capacitor charging. Where the rectifier 4 is uncontrolled, an additional diode (9) (Fig. 5, not shown) must be connected serially with the choke. An alternative arrangement (Fig. 4, not shown) is described in the Specification. |
