Method and system for removing interference signals in overcurrent protection
A technology of interference signal and overcurrent protection, applied in the protection of overcurrent response, emergency protection circuit devices, components of emergency protection devices, etc., can solve the problems affecting the accuracy of overcurrent protection, judgment errors, etc. Avoid misjudgment, improve work efficiency, avoid the effect of shutdown protection
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Embodiment 1
[0041] Such as figure 1 As shown, this embodiment provides a method for removing interference signals in overcurrent protection, including the following steps:
[0042] Step S102, comparing the current sampling signal with the current protection threshold to obtain a comparison result;
[0043] Step S104, performing delay processing on the original driving signal to obtain the delayed driving signal;
[0044] Step S106, performing a first calculation on the original driving signal and the delayed driving signal to obtain a calculation result;
[0045] Step S108, performing a second calculation on the comparison result and the calculation result to obtain an overcurrent protection result with the interference signal removed.
[0046]In this embodiment, the current sampling signal can be measured by hardware such as a sampling resistor, and the current protection threshold is set and adjusted by those skilled in the art according to actual needs. The original drive signal is ...
Embodiment 2
[0050] This embodiment provides a method for removing interference signals in overcurrent protection. In addition to the technical features of Embodiment 1 above, this embodiment further includes the following technical features.
[0051] Delaying the original driving signal to obtain the delayed driving signal specifically includes the following steps: according to the size of the interference signal in the current sampling signal, determine the delay time of the delay processing; according to the delay time, delay the original driving signal processing to obtain the delayed driving signal.
[0052] In other words, in this embodiment, the delay processing time is determined by the size of the interference signal in the current sampling signal. When the interference signal in the current sampling signal is large, the delay processing time can be appropriately increased to ensure that the interference signal Perform complete filtration. When the interference signal in the curr...
Embodiment 3
[0055] Such as figure 2 As shown, this embodiment provides a method for removing interference signals in overcurrent protection. In addition to the technical features of the above-mentioned embodiments, this embodiment further includes the following technical features.
[0056] Performing the first calculation on the original driving signal and the delayed driving signal, and obtaining the calculation result specifically includes the following steps:
[0057] Step S202, performing an AND operation on the original driving signal and the delayed driving signal;
[0058] Step S204, performing a negation operation on the output result of the AND operation of the original driving signal and the delayed driving signal to obtain an operation result.
[0059] In this embodiment, and budget means: when the original driving signal and the delayed driving signal are both high level, the output result is high level; when the original driving signal and the delayed driving signal are not...
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