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ROTOR TESTING SYSTEM
The surge test applies steep pulses of energy to the coil winding under test. The Model RT6400 Tester uses a Waveform Signature Analysis technique to gather data from the ringing pattern produced by the part under test. This data is then compared to the waveform signature of a good part. Ringing time, amplitude, frequency and number of ringing cycles are analyzed using a 64-bit digital signal-processing technique. ESW rotor testers optimize the waveform ringing by automatically selecting the proper discharge capacitance needed for resonance with the coil winding under test. Pulse amplitude is digitally monitored and displayed on the user video screen. Surge voltage is adjustable from 0 to 3000 volts.
The surge test will reject winding and insulation faults such as shorts between the windings and insulation breakdowns.
The resistance test will reject open windings, wrong wire size, or wrong number of turns if they fall outside of the resistance limits.
The hipot test is capable of rejecting rotors for such discrepancies as excessive leakage and breakdowns between the wire and the adjacent metal.
The hipot voltage is manually adjustable from 0-3000 volts. Test times are programmable from .1 to 10 seconds.
A built in hipot fault feature prevents the rotor from going through the test without a proper hipot test being performed. If a proper hipot test is not performed, a screen alert appears.
The hipot test is capable of rejecting stators/fields for such discrepancies as excessive leakage and breakdowns between the wire and adjacent metal.
Magnetic Field Test (Optional Test):
The Model RT6400 tests single phase rotors. Phase and field strength differences detected during this test can be caused by improper slot loading of the winding, core-losses and/or mixed lead connections. All of these characteristics can have negative effects in final product performance.
The ESW magnetic field probe will operate within a broad range of lamination sizes. The radial and/or axial probe location seldom needs to be altered as long as it remains located somewhere within the lamination core. Each winding signature is individually saved as part of the limit record for each rotor setup.
With the use of ESW’s probes, each winding is checked individually for proper wire connection, phasing, and core-loss.
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