Table 2 Time required for propagation of different faults in the traction drive control system to different observation points
From: Research on fault tracing method of traction drive control system
| Â | Fault feature propagation to different observation points experience time \({\Delta t}_{p,h}^{k}\) | ||||
|---|---|---|---|---|---|
Observation point 1 | Observation point 2 | Observation point 3 | Observation point 4 | ||
Fault type | Traction motor failure | 0 \({T}_{1}+{T}_{2}+{T}_{3}\) | \({T}_{1}+{T}_{2}+{T}_{3}\) | \({T}_{1}+{T}_{2}+{T}_{3}\) | \(2\left({T}_{1}+{T}_{2}+{T}_{3}\right)\) |
TCU external communication port has analog and digital interference | \({T}_{2}+{T}_{3}\) | \({T}_{2}+{T}_{3}\) | \({T}_{2}+{T}_{3}\) | \({T}_{2}+{T}_{3}\) | |
TCU output control signal abnormal | \({T}_{3}\) | \({T}_{3}\) | \({T}_{3}\) | \({T}_{3}\) | |
Speed sensor failure, stator current sensor failure | 0 | \({T}_{1}+{T}_{2}+{T}_{3}\) | \({T}_{1}+{T}_{2}+{T}_{3}\) | \({T}_{1}+{T}_{2}+{T}_{3}\) | |
Rectifier input side current sensor, intermediate DC link current sensor fault | \({T}_{1}+{T}_{2}+{T}_{3}\) | \({T}_{1}+{T}_{2}+{T}_{3}\) | \({T}_{1}+{T}_{2}+{T}_{3}\) | \({T}_{1}+{T}_{2}+{T}_{3}\) | |
Rectifier input side voltage sensor, intermediate DC link voltage sensor failure | \({T}_{1}+{T}_{2}+{T}_{3}\) | \({T}_{1}+{T}_{2}+{T}_{3}\) | \({T}_{1}+{T}_{2}+{T}_{3}\) | \({T}_{1}+{T}_{2}+{T}_{3}\) | |
Inverter power device failure or deterioration of electrical characteristics | \({T}_{3}\) | \({T}_{3}\) | \({T}_{3}\) | \({T}_{1}+{T}_{2}+{2T}_{3}\) | |
Failure of rectifier power devices or deterioration of electrical characteristics | \({T}_{1}+{T}_{2}+{2T}_{3}\) | \({T}_{3}\) | \({T}_{3}\) | \({T}_{3}\) | |
Passive component failure or deterioration of electrical characteristics | \({T}_{1}+{T}_{2}+{T}_{3}\) | 0 | 0 | \({T}_{1}+{T}_{2}+{T}_{3}\) | |