Boost DC-DC converter with continuous input and output current

Abstract

A boost DC-DC converter with continuous input and output currents includes a diode D1, a capacitor C1, an inductor L1, an inductor L2, a capacitor Co and one electronic switch, the electronic switch has a port a and a port b, the anode of the diode D1 is simultaneously connected to the positive terminal of a DC power supply Vi and to the port a of the electronic switch, the cathode of the diode D1is connected to one end of the capacitor C1 and one end of the inductor L1 at the same time, the port b of the electronic switch is simultaneously connected to the other end of the capacitor C1 and one end of the inductor L2, the other end of the inductor L1 is simultaneously connected to one end of the capacitor Co and one end of a load Z, and the other end of the load Z is simultaneously connected to the other end of the capacitor Co, the other end of the inductor L2 and the negative end of the DC power supply Vi. The boost DC-DC converter is characterized in that the input and output currents are continuous, the output voltage is greater than or equal to the DC power supply voltage, and the output voltage is of the same polarity.

Description

technical field [0001] The invention relates to a direct current-direct current (DC-DC) converter, especially a step-up DC-DC converter with continuous input and output currents and the same polarity of input and output voltages, which can be used as a basic unit to form multi-input and Multi-output DC power system, such as: DC power module parallel system, LED array drive system, distributed photovoltaic power generation system, etc. Background technique [0002] The existing basic DC-DC converters with boost function include Boost converter, Buck-Boost converter, Cuk converter, Sepic converter and Zeta converter. As listed in Table 1, without considering the output capacitor, none of the above five basic DC-DC converters with a step-up function satisfies the requirement of "both input and output currents are continuous and input and output voltages have the same polarity". Require. [0003] [0004] Table 1. Contents of the invention [0005] In order to overcome t...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings that the existing basic DC-DC converters with a boost function do not meet the requirements of "continuous input and output currents and the same polarity of input and output voltages", the present invention provides a boost DC-DC converter It can realize continuous input and output current and the same polarity of input and output voltage, expanding the types of DC-DC converters

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