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

Claim 12:
13. A fault detection method, applicable to a high-voltage interlocking device comprising:
a first resistance module, an end of the first resistance module being connected to a first connection end of a first switch module, a first connection end of a high-voltage component under detection, and an end of a second resistance module, respectively, and another end of the first resistance module being connected to a first power terminal;
the first switch module, a second connection end of the first switch module being connected to a first reference potential through a third resistance module, and a control terminal of the first switch module being configured to receive a first driving signal to enable the first switch module to be turned on or off according to the first driving signal;
the second resistance module, another end of the second resistance module being connected to a second reference potential;
a fourth resistance module, an end of the fourth resistance module being connected to a second connection end of the high-voltage component under detection and a first connection end of a second switch module, and another end of the fourth resistance module being connected to a second power terminal;
the second switch module, a second connection end of the second switch module being connected to a third reference potential through a fifth resistance module, and a control terminal of the second switch module being configured to receive a second driving signal to enable the second switch module to be turned on or off according to the second driving signal;
a fault detection module, configured to determine a fault of the high-voltage component under detection according to a first detection signal obtained from the first connection end of the high-voltage component under detection, wherein the fault of the high-voltage component under detection comprises a short power supply fault, an open-circuit fault or a short-ground fault,
wherein an on-off state of the first switch module is opposite to an on-off state of the second switch module, when the first switch module is turned on, power of the high-voltage interlocking device is supplied by the second power terminal, and when the second switch module is turned on, the power of the high-voltage interlocking device is supplied by the first power terminal,
the method comprising:
obtaining, by the fault detection module, the first detection signal from the end of the second resistance module; and
determining, by the fault detection module, the fault of the high-voltage component under detection according to the first detection signal;
wherein the fault of the high-voltage component under detection comprises any of a short power supply fault, an open-circuit fault or a short-ground fault.