| 摘要 |
The proposed alternating-current drive contains a wound-rotor induction motor, two three-phase bridge rectifiers with control units, an inductance coil, a current transducer, a summing unit, a relay element, and a current set-point unit. The stator winding of the motor is connected to the mains terminal. The terminals of the motor rotor winding are connected to the three-phase input of the first rectifier. The terminals of the cathode group of the first rectifier are connected to the terminals of the anode group of the second rectifier. The second rectifier is designed as a completely controlled rectifier. The terminals of the anode group of the first rectifier are connected to the terminals of the cathode group of the second rectifier via the inductance coil and the detecting element of the current transducer that are connected in series. The output of the current transducer is connected to the inverting input of the summing unit. The noninverting input of the summing unit is connected to the output of the current set-point unit. The output of the summing unit is connected to the input of the relay element, which output is connected to the input of the control unit of the second rectifier. |
