| 摘要 |
PCT No. PCT/SU87/00057 Sec. 371 Date Jan. 17, 1989 Sec. 102(e) Date Jan. 17, 1989 PCT Filed May 14, 1987 PCT Pub. No. WO88/09082 PCT Pub. Date Nov. 17, 1988.A gate-controlled electric drive comprises a synchronous motor (2) having m windings (2) and provided with a shaft position transducer whose output is connected to an address input of a permanent memory. The outputs for setting a pulse width code of said permanent memory are connected to inputs of pulse-width modulators, while outputs for setting a polarity code of said permanent memory are connected to inputs of a reverser. The outputs of the pulse-width modulators are connected to control inputs of corresponding control units, whereas inputs for setting polarity of the control units are connected to outputs of the reverser. The outputs of each control unit are connected to inputs of a respective switching unit based on bidirectional switches connected in a bridge circuit, a switching unit being connected to the respective winding of the synchronous motor. A timer (67) is connected to the control units and to an m-phase transformer whose output windings are connected directly to power inputs of the respective switching units. |
