Single-phase four-level rectifying power supply based on pseudo totem pole structure

Through a single-phase four-level rectifier power supply based on a pseudo-totem pole structure, the problems of large volume, low efficiency and high voltage stress of traditional two-level rectifiers in high-power applications are solved, and a low-cost and high efficiency power supply is realized Designed for modern power supply needs.

CN119134931AActive Publication Date: 2024-12-13CHINA THREE GORGES UNIV
View PDF 3 Cites 0 Cited by

Patent Information

Application Number
CN202411168119.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-08-23
Publication Date
2024-12-13
Estimated Expiration
2044-08-23

AI Technical Summary

Technical Problem

In high-power applications, traditional two-level rectifiers have large filter size and low efficiency, and high voltage stress on the switching tube and high cost, making it difficult to meet the needs of modern power supplies.

Method used

Using a single-phase four-level rectifier power supply based on a pseudo-totem pole structure, the four-level DC bus split is achieved through 8 fully controlled power switches and 6 diodes, combining inductors and capacitors, and reducing the voltage stress of power devices. The circuit structure is optimized through 8 operating modes to reduce the volume of the filter inductor and output capacitor.

Benefits of technology

It realizes low harmonic content and low power device voltage stress, reduces device selection cost, improves the efficiency and reliability of the rectifier, and the bridgeless structure reduces on-state losses, and the overall design tends to be small-volume modular.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119134931A_ABST
    Figure CN119134931A_ABST
Patent Text Reader

Abstract

A single-phase four-level rectifying power supply based on a pseudo totem pole structure comprises eight full-control power switch tubes S1 to S8, diodes D1 to D6, inductors L1 and L2 and capacitors C1 to C3. One end of the alternating current power supply ug is connected with the anode of the diode D5 and the cathode of the diode D6 at an end point n; the other end of the AC power supply ug is connected with one end of an inductor L1 and one end of an inductor L2; the other end of the inductor L1 is respectively connected with the anode of the diode D1 and the drain electrode of the switch tube S1 at an end point a; the other end of the inductor L2 is connected with the cathode of the diode D2 and the source electrode of the switching tube S4 at the end point b. The cathode of the diode D1 is respectively connected with the drain electrode of the switching tube S3, the cathode of the diode D5, the anode of the capacitor C1 and the anode of the load RL at an end point p; the source electrode of the switching tube S2 is connected with the anode of the diode D2, the anode of the diode D6, the cathode of the capacitor C3 and the cathode of the load RL at an end point m. According to the rectifier, the pseudo totem pole rectification technology and the four-level topology technology are fused, so that the stress of a switch tube can be effectively reduced, the overall efficiency of a system is improved, and a bridge arm direct connection phenomenon does not exist.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Three-level pseudo totem pole type converter suitable for single-phase AC / DC hybrid microgrid

    CN114884388A

  • Flying capacitor multi-level rectifier and control method thereof

    CN118017809A

  • Single-phase four-level rectifier circuit, power supply and electronic equipment based on pseudo-totem pole structure

    CN119787845A