DEVICE FOR DIAGNOSIS AND QUICKLY PROTECTION OF ASYNCHRONOUS ENGINE Russian patent published in 2019 - IPC G01R31/34 H02H7/08 

FIELD: measurement technology.

SUBSTANCE: invention relates to devices for diagnosing and high-speed protection of asynchronous motors. Device for diagnosing and high-speed protection of the induction motor further comprises a magnetic induction sensor placed in the air gap of the induction motor and designed to measure the instantaneous values of magnetic induction, the scaled signal about the value of which from the output of the scaling amplifier of the magnetic induction signal is fed to the block of band-pass filters tuned to the harmonic frequencies of the diagnostic signs, the outputs connected to the first inputs of the comparators block, the second inputs of which are connected to the outputs of the shaper of amplitudes of the reference signals corresponding to the diagnostic features, the outputs of the comparators block are connected to the installation inputs of the trigger block and the inputs of the OR logic element connected by the output to the control input of the controlled switching device, the reset inputs of the trigger unit are interconnected and are the reset input of the error code, the visual display of which is performed by the indication unit of the error code signal, the inputs of which are connected to the outputs of the trigger block.

EFFECT: improving the speed of protection, increasing the accuracy of diagnosing an asynchronous motor.

1 cl, 10 dwg