Patent ID: 11933850
Assignee: HANGZHOU HENUOVA TECHNOLOGY CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. A method for detecting a slot wedge, an air gap and a broken rotor bar in a magnetic circuit of electric machinery according to claim 1, comprising
forming the distributed coupling magnetic field reflected full-cycle waves for reflecting the difference of the corresponding slot wedge after magnetic-field pulses concurrently moving are reversely coupled and received by adjacent two-phase symmetrical windings of a stator;
acquiring, by the waveform acquisition unit, adjacent two-phase coupling magnetic field reflected full-cycle waves of the stator to compare waveforms; and
displaying, in a form of a two-dimensional waveform, three time-domain projection surfaces formed into an angle of 120° in a circumferential direction, wherein waveforms of full-cycle waves of magnetic circuits reflect transient electromagnetic characteristics of a corresponding symmetrical magnetic circuits, and states of the symmetrical magnetic circuits.