METHOD FOR DETERMINING THE TECHNICAL QUALITY INDICATORS OF THE MAGNETIC CIRCUIT OF THE INDUCTOR OF A THREE-PHASE LINEAR ASYNCHRONOUS ELECTRIC MOTOR Russian patent published in 2023 - IPC G01R31/34 H02K41/02 

FIELD: electrical engineering.

SUBSTANCE: invention is related to the field of determining the technical quality indicators of magnetic circuits of inductors of linear induction motors. Three experiments are carried out in succession, in each of which a vector-pulse of the supply voltage is formed on one of the spatial axes of the device in form of a voltage pulse, close in shape to the Dirac delta function, on a combination of phases C, A, B of the winding. In each experiment, current pulses of i_C(t), i_A(t), i_B(t) phases C, A, B of the winding are recorded, their amplitudes are selected and stored in the columns of the Green's matrix. In this case, in the first experiment, phase B is connected antiparallel to phase A, and phase C is short-circuited. In the second experiment, phase C is connected antiparallel to phase B, and phase A is short-circuited. In the third experiment, phase A is connected antiparallel to phase C, and phase B is short-circuited. According to the elements of the formed Green's matrix, the amplitudes of the current impulse vector are calculated in three experiments. As indicators of the magnitude of the magnetizing current along the spatial axes of the device, the amplitudes of the magnetizing currents along these axes are calculated. As indicators of the uneven distribution of magnetic properties along the axes, the angles of deviation of the current vector pulses from these axes are calculated. As an indicator of the magnitude of the magnetizing current of the magnetic circuit of the inductor, the average value of the amplitudes of the magnetizing current along the axes is calculated. As an indicator of the uneven distribution of the magnetic properties of the magnetic circuit of the inductor, the average value of the angles of deviations of the current vector pulses from the axes is calculated. By comparison with the indicators of the reference magnetic circuit, the technical quality of the tested magnetic circuit is judged.

EFFECT: enhancement of functionality.

1 cl, 6 dwg