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

Claim 2:
3. The method for detecting a slot wedge, an air gap and a broken rotor bar in a magnetic circuit of electric machinery according to claim 2, specifically comprising the following steps:
(1) controlling, by a personal computer (PC) terminal, the sequential circuit to generate the double concurrent pulses that are symmetrical reverse synchronous pulses;
(2) amplifying, by the driving power modules, the symmetrical reverse synchronous pulses and outputting the symmetrical reverse synchronous pulses to the front-end interface circuits, thereby converting into symmetrical reverse transient rotating magnetic-field pulses;
(3) transmitting the magnetic-field pulses to the power supply terminals on the adjacent phases of the stator windings through the impedance matching pins, coupling the magnetic-field pulses at the corresponding coil, air gap and squirrel cage rotor to generate the single groups of cyclic rotating magnetic potentials;
(4) generating the single rotating magnetic potentials in the adjacent slots on each of the adjacent phases of the stator windings;
(5) magnetically coupling the rotating electric potentials in the magnetic circuits with the two symmetrical phases to form the distributed coupling magnetic field reflected full-cycle waves for reflecting the difference of the corresponding slot wedge; and
(6) acquiring, by the waveform acquisition unit, the coupling magnetic field reflected full-cycle waves, and comparing three waveforms of the electric machinery, wherein every two phases in the waveforms are formed into an angle of 120°.