METHOD FOR FORMING THE FLUX LINKAGE OF AN ASYNCHRONOUS MOTOR ROTOR AS PART OF AN ELECTRIC DRIVE WITH VECTOR FIELD-ORIENTED CONTROL WHEN OPERATING IN A LIMITED VOLTAGE ZONE Russian patent published in 2021 - IPC H02P21/08 H02P21/14 H02K17/16 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering, in particular to a vector field-oriented control system for an electric drive based on an asynchronous motor with a short-circuited rotor. The method for forming the flux linkage of the rotor of an asynchronous motor with a short-circuited rotor as part of an electric drive with vector field-oriented control for static operation mode is that it provides the creation of a signal of a given moment M_ref, by means of which the dependence of the flux linkage of the rotor on the given moment M_ref is formed to determine the value of the flux linkage of the rotor at a given moment . At the same time, the maximum flux linkage is calculated, which, when the stator voltage reaches the given value , limits the value of the rotor flux linkage at a given moment and generates a flux linkage signal ψ_ref. Next, the boundary angular rotation frequency ω ^Pmax of the rotor is determined. If the angular frequency of the rotor is ω≤ω _Pmax, then a signal of a given flux linkage is formed, which corresponds to the flux linkage signal ψ_ref. As soon as the angular frequency exceeds the boundary value ω>ω_Pmax, a task signal is generated for the rotor flux linkage in the power reduction zone, which is determined taking into account the value of the maximum stator voltage . Next, the resulting signal of the specified flux linkage of the asynchronous motor rotor is formed, the value of which at ω≤ω ^Pmax corresponds to the signal of the specified flux linkage ψ_ref for the limited voltage zone, and at ω>ω^Pmax, to the value of the signal of the rotor flux linkage task in the power reduction zone.

EFFECT: increase in the energy performance of an asynchronous electric drive with vector field-oriented control when operating in the area of limiting the stator voltage and in the area of high engine speeds.

1 cl, 6 dwg, 1 tbl