Three-level Boost circuit and multi-output parallel system

Abstract

The invention discloses a three-level Boost circuit and a multi-output parallel system, which prevent overvoltage damage of a switching device. The circuit comprises capacitors Cin and C1-C2, an inductor L1, switches K1-K2, diodes D1-D2 and D11-D13, and an output series capacitor group Co. Nodes P1 and P2 are arranged in the output series capacitor group Co; the negative electrode of the capacitorCin is connected with a low-potential end of the output series capacitor group Co; the positive electrode of the capacitor Cin is connected with a high-potential end of the output series capacitor group Co through the first end of the L1, the second end of the L1, the anode of D1, the cathode of D1, the anode of D2 and the cathode of D2 in sequence; the second end of the L1 is connected with a negative electrode of the Cin through the first end of the K1, the second end of the K1, the first end of the K2 and the second end of the K2 in sequence; the cathode of the D1 is connected with the negative electrode of the Cin through the anode of the C1, the anode of D11, the anode of D11 and the C2 in sequence; the second end of K1 is connected with the anode of D11; the anode of D12 is connected with the anode of D2, and the anode of D12 is connected with P2; the cathode of the D13 is connected with the P1, and the anode of the D13 is connected with the cathode of the D11; and K1 and K2 arealternately conducted.

Description

technical field [0001] The invention relates to the technical field of power electronics, more specifically, to a three-level Boost circuit and a multi-channel output parallel system. Background technique [0002] With the rise of power electronic converter system voltage, the withstand voltage requirements for related switching devices are also gradually increasing. However, due to the influence of semiconductor process performance and other aspects, the development of cost-effective devices has a certain lag, and it cannot meet the relevant requirements in the short term. Therefore, how to use lower voltage level devices to realize high-voltage power changes at a lower cost has become a research hotspot, and the proposal of multi-level technology can better solve this problem. [0003] The power change includes step-up conversion, step-down conversion, buck-boost conversion, etc. The present invention only focuses on preventing overvoltage damage to switching devices durin...

AI Technical Summary

Problems solved by technology

[0002] With the rise of power electronic converter system voltage, the withstand voltage requirements for related switching devices are also gradually increasing. However, due to the influence of semiconductor process performance and other aspects, the development of cost-effective devices has a certain lag, and it cannot meet the relevant requirements in the short term. Therefore, how to use lower voltage level devices to achieve high-voltage power changes at a lower cost has become a research hotspot, and the proposal of multi-level technology can better solve this problem

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