Quadratic high-gain boost converter with continuous input current

Abstract

The invention relates to a quadratic high-gain boost converter with a continuous input current, comprising an input boost module, a voltage conversion module and a rectifier filter output module, specifically comprising a first switching tube S1, a second switching tube S2, a first inductance L1, a second inductance L2 or transformer T, a first diode D1, a second diode D2, a first capacitor C1 anda second capacitor C2, and comprising a non-isolated topological structure or an isolated topological structure. The quadratic high-gain boost converter provided by the invention can realize non-isolated boost of an output voltage and also can realize isolated boost of the output voltage, thereby being applicable to an occasion that a high voltage needs to be output in a boost mode.

Description

technical field [0001] The invention relates to a square high-gain step-up converter with continuous input current, in particular, it is suitable for occasions where a positive voltage is output and a step-up conversion is required, especially for occasions where a higher voltage needs to be output in a step-up mode. Isolation conversion, also capable of isolation conversion, belongs to the technical field of switching power converters. Background technique [0002] As an essential part of the active stand-alone satellite payload, the on-board power supply is widely used in satellite systems of different platforms including Tiantong series satellites, Fengyun series satellites, and Ocean series satellites. [0003] Satellite payloads are generally composed of two parts: functional loads and on-board power supplies (EPC). The functional loads include solid-state power amplifiers, traveling wave tube power amplifiers, receivers, frequency converters, and digital processing equ...

AI Technical Summary

Problems solved by technology

[0005] When the post-stage load is a power amplifier, there are mainly the following problems now: 1. When using a non-isolated topology for cascading and isolating two-stage cascading, when the bus range is low (such as the lowest bus of the existing platform is 13V), with The increase in the voltage required by the post-stage load is limited by the gain of the pre-stage non-isolated converter. The turn ratio of the power isolation transformer is very large, and the ensuing problem is that the copper loss increases. The inter-electrode capacitance and inter-electrode inductance of the transformer also increase, which will cause unpredictable common state conduction and voltage and current spikes and other electromagnetic interference problems; 2. When using a single-stage isolated topology, when the turn ratio is 1 , the output voltage is generally proportional to the duty cycle, that is, the output voltage cannot be higher than the input voltage. Also in th

Images