CALCULATION OF TRANSIENT PROCESSES DURING THE START-UP OF AN ELECTRIC DRIVE WITH AN ASYNCHRONOUS MOTOR CONNECTED DIRECTLY TO THE NETWORK
Keywords:
Open adjustment system, transient process, stator current flow, space vector, flow application, electromagnetic torque.Abstract
This article calculates the transient processes occurring during the start-up of an electric drive using a system of equations describing the mathematical expression of an asynchronous motor electric drive in an open-loop control system. The calculations take into account the mathematical expression of the speed control system of an asynchronous motor electric drive, which ensures the invariance of the stator flux linkage, the nonlinearity of the voltage dependence on the frequency, and the nonlinearity of the system itself. The article also analyzes the equations that provide the relationships between voltages, currents, and flux linkages in the form of phase vectors, as well as the equations that determine the electromagnetic torque of an asynchronous motor. The calculation equations additionally include the equations of the mechanics of the electric drive and the equations that relate the angular frequency of the supply voltage to the engine speed and the angular frequency of the rotor electric driving force.
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