Circuit for realizing high-frequency detection and low-frequency reconstruction of phase current of inverter based on CT (Computed Tomography)

The invention discloses a circuit for realizing inverter phase current high-frequency detection and low-frequency reconstruction by an algorithm based on a CT (Computed Tomography). The circuit is characterized in that a high-frequency detection unit is connected with a signal conditioning unit; the high-frequency detection unit provides a high-frequency signal for the signal conditioning unit; the signal conditioning unit is connected with the low-frequency reconstruction unit; the low-frequency reconstruction unit is connected with the high-frequency detection unit; the signal conditioning unit is used for conditioning the high-frequency signal to obtain a positive half-cycle signal; and the low-frequency reconstruction unit restores the positive half cycle signal to obtain the actual phase current of the inverter. According to the invention, current detection is carried out by using the current transformer, and an additional isolation circuit does not need to be designed, so that the cost is reduced; by ad