Patent ID: 11927639
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Transport (Mechanical engineering)
Classification: CPC B  G  Y | IPC B  G

Claim 14:
15. The fault detection method of claim 13, wherein
the high-voltage interlocking device further comprises a seventh resistance module, an end of the seventh resistance module being connected to the second connection end of the high-voltage component under detection, the end of the fourth resistance module, the first connection end of the second switch module, and the fault detection module, respectively, and another end of the seventh resistance module being connected to a fourth reference potential;
determining, by the fault detection module, the fault of the high-voltage component under detection according to the first detection signal comprises:
determining, by the fault detection module, that the short power supply fault occurs in the high-voltage component under detection, under a condition that a first short power supply determination condition is met, wherein the first short power supply determination condition comprises at least one of following sub-conditions: a high-level voltage of the first detection signal is equal to a first reference short power supply voltage, a low-level voltage of the first detection signal is equal to a second reference short power supply voltage, a high-level voltage of the second detection signal is equal to a third reference short power supply voltage, and a low-level voltage of the second detection signal is equal to a fourth reference short power supply voltage;
determining, by the fault detection module, that the open-circuit fault occurs in the high-voltage component under detection, under a condition that a first open-circuit determination condition is met, wherein the first open-circuit determination condition comprises at least one of following sub-conditions: the high-level voltage of the first detection signal is equal to a first reference open-circuit voltage, the low-level voltage of the first detection signal is equal to a second reference open-circuit voltage, the high-level voltage of the second detection signal is equal to a third reference open-circuit voltage, the low-level voltage of the second detection signal is equal to a fourth reference open-circuit voltage;
determining, by the fault detection module, that the short-ground fault occurs in the high-voltage component under detection, under a condition that a first short-ground determination condition is met, wherein the first short-ground determination condition comprises at least one of following sub-conditions: the high-level voltage of the first detection signal is equal to a first reference short-ground voltage, the low-level voltage of the first detection signal is equal to a second reference short-ground voltage, the high-level voltage of the second detection signal is equal to a third reference short-ground voltage, the low-level voltage of the second detection signal is equal to a fourth reference short-ground voltage.