Circuit for increasing over-current protection anti-interference capability
An overcurrent protection and circuit technology, applied in the field of frequency converters, can solve problems such as malfunction, personal injury, disturbing the normal operation of the system, etc., and achieve the effect of effective overcurrent protection, great significance, and strong anti-electromagnetic interference ability.
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[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0016] Such as Figure 1 to Figure 2 As shown, a circuit for improving the anti-interference ability of over-current protection, including three-phase current output current signal, current signal anti-interference circuit, precision rectification absolute value circuit, proportional integral circuit, over-current comparison circuit, over-current signal anti-interference circuit and a DSP processing circuit, the three-phase current output current signal is connected to a precision rectification absolute value circuit through a current signal anti-interference circuit, the precision rectification absolute value circuit is connected to a proportional integral circuit, and the proportional integral circuit is connected to an overcurrent comparison circuit The over-current comparison circuit is connected with the over-current signal anti-interferen...
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