Patent ID: 11909322
Assignee: WUXI SI-POWER MICRO-ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 7:
8. The power conversion circuit adopting the isolation type power conversion method based on demagnetization iteration control according to claim 7, characterized in that the demagnetization time iteration control unit comprises a second switch and a third switch, wherein a control end of the second switch is electrically connected with an output end of the secondary side turn-off/turn-on unit, a control end of the third switch is electrically connected with the output end of the secondary side turn-off/turn-on unit through a pulse trigger circuit, a first base electrode of the second switch is electrically connected with a second voltage-controlled current source circuit, a second base electrode of the second switch is electrically connected with a first base electrode of the third switch and a positive input end of a third comparator TB, a second base electrode of the third switch and a negative electrode of the secondary side of the high-frequency transformer in the demagnetization stage share a common ground, the second base electrode of the second switch is further electrically connected with a first base electrode of a fourth switch and one end of a second capacitor, a second base electrode of the fourth switch is electrically connected with one end of a third capacitor, the second base electrode of the fourth switch is further electrically connected with a negative electrode of a positive iteration error amount voltage source and a positive electrode of a negative iteration error amount voltage source, a positive electrode of the positive iteration error amount voltage source is electrically connected with a negative input end of the third comparator TB through a fifth switch, a negative electrode of the negative iteration error amount voltage source is electrically connected with the negative input end of the third comparator TB through a sixth switch, an output end of the third comparator TB is electrically connected with a D input end of a second D trigger, a Q output end of the second D trigger is electrically connected with a control end of the fifth switch, a Q non-output end of the second D trigger is electrically connected with a control end of the sixth switch, and a control end of the fourth switch and a CP input end of the second D trigger are both electrically connected with an ONTRIG output end of the first comparator, and the output end of the third comparator TB is also electrically connected with the control signal modulation circuit.