Motor Winding Maintenance
Perform impulse testing and use the results in motor winding maintenance and trend management.
Measurement Example
Check for Insulation Defects and Deterioration
Even If No Non-Defective Part is Available
On a standard, properly configured 3-phase motor, the phases (U,V,and W) are balanced. Consequently, the response waveforms obtained when an impulse voltage is applied between phases (U-V,V-W,W-U) will be almost identical.
By tentatively identifying the response waveform obtained from one phase as the waveform for a non-defective part and comparing it to the response waveforms from the other phases, you can detect insulation failures and deterioration.
Non-Defective Product Response Waveform
Example of Response Waveform Exhibiting Insulation Deterioration
Example of Response Waveform Exhibiting Insulation Short
Instruments Used
IMPULSE WINDING TESTERST4030A
・High-precision waveform detection: 200 MHz, 12-bit resolution
・Quantification of response waveforms
(using a patent held by Toenec Corporation)
Discharge Detection FunctionST9000
・Detection of discharges obscured by noise
(option)