Three-section type current transformer electricity taking circuit

The invention discloses a three-section type current transformer electricity taking circuit which at least comprises a current transformer, a rectifying circuit, an electronic switch, an overvoltage detection unit, a pre-voltage-stabilizing unit and a voltage-stabilizing output unit, the primary side of the current transformer is sleeved with a line, and the secondary side of the current transformer is connected with the rectifying circuit; the rectifying circuit adopts full-bridge rectification; the overvoltage detection unit is connected with the electronic switch and is used for generatinga first control signal when the charging voltage is higher than a first voltage preset value so as to control the conduction of the electronic switch; the electronic switch is connected with the rectifying circuit, when a first control signal is obtained, the electronic switch is switched on to enable an upper half bridge or a lower half bridge to be in short circuit to form a new current loop soas to enable the rectifyin