Detecting system and diagnostic method using the same
A detecting system and a diagnostic method applying the same are provided. The detecting system comprises a power module, a sensing module and a processing module. The sensing module electrically connected to the power module. The sensing module is configured to measure the impedance value of at least one signal terminal of the power module. The processing module electrically connected to the sensing module. The processing module is configured to receive the impedance value and determine whether the impedance value meets an abnormal threshold.
1 . A detecting system, comprising:
a power module being a configuration of a three-phase six-pulse bridge and including a plurality of signal terminals;
a sensing circuit electrically connected to the power module and configured to actively measure an impedance value of the plurality of signal terminals of the power module, wherein the sensing circuit includes a plurality of switch elements respectively electrically connected to the plurality of signal terminals to select one of the signal terminals for measurement; and
a processing module electrically connected to the sensing circuit, wherein the processing module is configured to receive the impedance value and determine whether the impedance value meets an abnormal threshold,
wherein the processing module includes a comparator, the comparator is configured to compare the impedance value with a preset threshold value to determine whether the impedance value meets the abnormal threshold value,
wherein the sensing circuit includes an impedance element and a regulator, the impedance element is electrically connected to the plurality of signal terminals, the regulator is electrically connected to the impedance element and the power module, and
the processing module is configured to perform a voltage division calculation of impedance based on an equivalent circuit formed by the impedance element, the regulator and one of the plurality of signal terminals to obtain the impedance value at the one of the plurality of signal terminals.
2 . The detecting system according to claim 1 , wherein the sensing circuit includes a buffer electrically connected to the switch elements.
3 . The detecting system according to claim 2 , wherein the processing module includes a selector, the buffer is electrically connected between the selector and the switch elements, and the selector is configured to selectively switch the switch elements.
4 . The detecting system according to claim 1 , wherein the sensing circuit includes a buffer electrically connected to the comparator.
5 . The detecting system according to claim 4 , wherein the impedance element is electrically connected to the buffer.
6 . The detecting system according to claim 1 , wherein the processing module includes a register, the register is electrically connected to the comparator, and the register is configured to temporarily store a determination result of whether the impedance value meets the abnormal threshold.
7 . A diagnostic method applying the detecting system according to claim 1 , comprising:
integrating the sensing circuit into a driving controller;
suspending the activation of the driving controller;
measuring the impedance value of the plurality of signal terminals of the power module, and
receiving the impedance value and determining whether the impedance value meets the abnormal threshold, wherein activating the driving controller if the impedance value meets the abnormal threshold, outputting a warning message and cancelling the activation of the driving controller if the impedance value does not meet the abnormal threshold.
8 . The diagnostic method according to claim 7 , wherein the sensing circuit includes a buffer electrically connected to the switch elements.
9 . The diagnostic method according to claim 8 , wherein the processing module includes a selector, the buffer is electrically connected between the selector and the switch elements, and the selector is configured to selectively switch the switch elements.
10 . The diagnostic method according to claim 7 , wherein the sensing circuit includes a buffer electrically connected to the comparator.
11 . The diagnostic method according to claim 10 , wherein the impedance element is electrically connected to the buffer.
12 . The diagnostic method according to claim 7 , wherein the processing module includes a register, the register is electrically connected to the comparator, and the register is configured to temporarily store a determination result of whether the impedance value meets the abnormal threshold.