Boost type DC-DC converter

Abstract

The invention relates to a boost type DC-DC converter. The boost type DC-DC converter comprises an inductor L1, a diode D1, a capacitor C1, an inductor L2, a capacitor Co and an electronic switch; theelectronic switch is provided with a port a and a port b; one end of the inductor L1 is connected with the positive end of a DC power source Vi; the other end of the inductor L1 is simultaneously connected with the anode of the diode D1 and the port a of the electronic switch; the cathode of the diode D1 is simultaneously connected with one end of the capacitor C1, one end of the capacitor Co andone end of a load Z; the port b of the electronic switch is simultaneously connected with the other end of the capacitor C1 and one end of the inductor L2; and the other end of the load Z is simultaneously connected with the other end of the capacitor Co, the other end of the inductor L2, and the negative end of the DC power source Vi. The input and output current of the boost type DC-DC converter is continuous, and the output voltage of the boost type DC-DC converter is greater than or equal to the voltage of the DC power source and have 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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