METHOD OF DETERMINATION OF ELECTROMAGNETIC PARAMETERS OF ASYNCHRONOUS ELECTRIC MOTORS Russian patent published in 2017 - IPC G01R27/26 

FIELD: electricity.

SUBSTANCE: in the known method for determining the inductance of phase dissipation of the stator winding of an asynchronous motor, a constant voltage U0 and the current in the stator winding connected in a three-phase circuit. The stator winding is short-circuited when the rotor is stationary. The value of the derivative (di₁/dt)_t=0 of decaying stator current at the initial moment of the transient. Calculating the value of the inductance of the stator winding phase scattering where k is the factor that depends on the connection of the stator winding phase diagrams. According to the invention dimension derivative (di₁/dt)_t=0 is carried out using transitional tracks feature i₁(t) fading stator current as an array of its instantaneous values. Additionally, the envelope of this characteristic is approximated by the expression Determining the initial currents I₁, I_2, I₃ and the time constants T_1, T₂, T₃ exponents of the respectively gently, steep and supertransition sections of the characteristic i₁(t), and also the integral According to the measured and determined data, the electromagnetic parameters of the asynchronous motors are calculated.

EFFECT: increase in the identified electromagnetic parameters and the expansion of the arsenal of funds of a similar purpose.

5 dwg, 2 tbl