Starting Characteristics of the TRN-Sd System With Energy Storage in the Excitation Circuit

With the simultaneous limitation of the starting current at a given level, the quadratic dependence of the moment on the voltage does not allow creating moments that rotate that exceed the moment of the natural characteristic of the synchronous motor, which is a significant disadvantage of this starting method. Therefore, the purpose of the work is to study the static and dynamic characteristics when controlling the voltage of the thyristor voltage regulator in the stator of a synchronous motor and the influence of the capacitive energy storage on the starting modes at different moments of static resistance of production mechanisms with using calculation dependencies. For different moments of static resistance, calculated dependences of the asynchronous start mode of the synchronous motor were obtained. Analysis of calculated dependencies shows that the starting torque exceeds a fourfold value, and the average value of the torque is at a two-fold level. When the capacitive energy storage device was turned on in the excitation circuit, the moment increased by 15%, and the time decreased by 20%. Turning on capacitive energy storage devices in the excitation winding in combination with a thyristor voltage regulator in the stator circuit provides the necessary asynchronous moment of the synchronous motor depending on the moment of static resistance when the current load of the stator windings is reduced.