Table 1 Frequency values of fault characteristics at different observation points
From: Research on fault tracing method of traction drive control system
Grid frequency \(f \left(Hz\right)\) | Motor stator current frequency \({f}_{1} \left(Hz\right)\) | Slip rate \(s\) | Observation point 1 current fault characteristic frequency \(\left(1\pm 2s\right){f}_{1} \left(Hz\right)\) | Observation point 2 current fault characteristic frequency \({2sf}_{1} \left(Hz\right)\) | Observation point 2 current fault characteristic frequency \({2sf}_{1} \left(Hz\right)\) | Observation point 4 current fault characteristic frequency \(\left(4n\pm 1\right)f \pm 2s{f}_{1} \left(Hz\right)\) |
|---|---|---|---|---|---|---|
50 | 131.1 | 0.0172 | 126.6/135.6 | 4.5 | 4.5 | 45.5/54.5 145.5/154.5 245.5/254.5 |