一种软开关三电平Boost变换器及其调制策略
By introducing soft-switching circuits and modulation strategies into a three-level Boost converter, soft switching of the main and auxiliary switching transistors is achieved, solving the problems of high loss and electromagnetic interference under hard switching conditions, improving circuit efficiency and reducing noise, and simplifying EMI filter design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUHAN UNIV
- Filing Date
- 2022-12-29
- Publication Date
- 2026-07-17
AI Technical Summary
The switching transistors of the three-level boost converter operate in a hard-switching state, resulting in high switching losses and diode reverse recovery losses, severe electromagnetic interference noise, low circuit conversion efficiency, and increased difficulty in EMI filter design.
A soft-switching three-level Boost converter is adopted. By introducing soft-switching circuit sub-units and modulation strategies, zero-voltage turn-on and near-zero-voltage turn-off of the main switch and zero-current turn-on and near-zero-voltage turn-off of the auxiliary switch are achieved, thereby reducing switching losses.
It greatly reduces the switching losses of the three-level Boost converter, improves the circuit conversion efficiency, reduces electromagnetic interference noise, and simplifies the design of EMI filters.
Smart Images
Figure CN115882726B_ABST