Excavator characteristics of asynchronous electric drive with non-contact parametric regulation
Abstract
Modern development of power semiconductor technology makes it possible to obtain special characteristics of the asynchronous drive and to expand the field of its application. The simplest way to form the required characteristics is to regulate the parameters of the rotor and stator circuits of the induction motor by means of thyristors. For non-contact regulation of the rotor circuit resistance, the rotor circuit of the motor includes a rectifier assembled according to the Larionov scheme of uncontrolled semiconductor diodes . A resistance R and a choke L are included in the DC circuit of the rectifier. The resistance can be shunted by thyristor T1. A capacitance C is used to turn off thyristor T1, which is switched on by thyristor T2. The auxiliary circuit of inductance L1 and diode D1 serves to recharge the capacitance in the process of switching thyristors.
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References
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