Research into influence of a capacitor connected in series to an asynchronous motor on the motor operation

: pp. 17-20
Lviv Polytechnic National University
Lviv Polytechnic National University
Lviv Polytechnic National University

Transmission of electrical energy to the place of consumption is accompanied by its loss, defined by the magnitude of currents that flow through thetransmission line. As the main load is inductive in nature, the currents in the line have reactive components, which provide additional energy losses in the line. For their reduction, a capacitor set is connected in parallel or in series to the consumer. The paper proposes a method and an algorithm of the research into the influence of capacitance value of the series capacitor set on the basic parameters and characteristics of asynchronous motors (AM). Unlike the classical equivalent circuits, the developed algorithm uses a mathematical model of AM in form of nonlinear equations system, which takes into account nonlinear dependences of flux linkage on currents and current displacement in squirrel-cage rotor bars. This allows the highly accurate determination of the electromagnetic parameters of the motor and varying (due to skin effect) resistances of the rotor winding, which significantly affect the occurrence of resonance.

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