A single-inductor step-up and buck-boost dual-output DC converter

Abstract

The invention relates to a single-inductance step-up and buck-boost double-output direct current converter, which relates to direct current conversion technology. Including input voltage source, inductor, switch tube, diode, output capacitor and output resistance; input voltage source V i The positive terminal and the inductor L 1 Connected to one end of the inductor L 1 The other end of the switch tube is connected to the drain, the switch tube S 1 source of the input voltage source V i The negative terminal is connected, the switch tube S 2 source of the diode D s2 connected to the anode of the diode D s2 The cathode and output capacitor C 1 One end of the output resistance R 1 Connected to one end of the output capacitor C 1 the other end and the output resistor R 1 The other end is connected to the input voltage source V i The negative terminal of the switch tube S 3 source of the diode D s3 connected to the anode of the diode D s3 The cathode and output capacitor C 2 One end of the output resistance R 2 Connected to one end of the output capacitor C 2 the other end and the output resistor R 2 The other end is connected to the input voltage source V i positive end.

Description

technical field [0001] The invention relates to DC conversion technology, in particular to a single-inductance step-up and buck-boost dual-output DC converter. Background technique [0002] In many industrial and daily applications such as new energy DC microgrids, electric vehicles, and personal computers, there are multiple DC ports with different voltages, and DC converters are required between them to achieve voltage regulation and power control. One of the simplest solutions to this requirement is to use multiple independent DC converters. However, this solution uses a large number of components, resulting in a large system size and high cost. In order to optimize the cost and volume of the system, domestic and foreign studies have proposed an improved single-inductor multi-port DC converter, which only needs one inductor as a common power transmission path, thus effectively reducing the number of magnetic core components used. [0003] At present, based on the classi...

AI Technical Summary

Problems solved by technology

If one output voltage is lower than the input voltage, its output current will also be limited

In the third type of single-inductor dual-output DC converter, the positive terminal of the second output is connected to the negative terminal of the input, which can provide two outputs of boost and buck-boost at the same time, but when the current of each inductor is not zero In the commutation mode, there are always two semiconductor devices in the conduction state, and its conduction loss is relatively high ([3] L.Benadero, V.Moreno-Font, R.Giral, and A.E.Aroudi,"Topologies and control of a class of single inductor multiple-output converters operating in continuous conduction mode,"IET Power Electron.,vol.4,no.8,pp.927-935,Sept.2011)

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