| Abstract |
The paper refers particulary to a vector-controlled, sine-wave current converter fed induction motor drive system. The essential novelty consists in an original application of the vector-control principle. The magnetic flux in the air-gap is identified by means of the motor model, in a stator current oriented feedback loop. A control loop, oriented according to the magnetic flux in the air-gap was adopted, in order to determine the manipulated variables which control the power electronic converter. So, a vector-control system, in agreement with the converter and the identification part of the system was obtained. The paper presents the detailed field-oriented speed control system. The induction motor state identification is analysed, the rotor speed and phase currents measurements being discussed through the adequate test loops and digital recording programmes. The paper presents the strategies used for the motor acceleration and reversing regime too. The results refer to the dynamic behaviour of the drive system. |
