Boosting DC converter device based on tap inductor

Abstract

The invention discloses a boosting DC converter device based on a tap inductor. The boosting DC converter device comprises a circuit unit and a switching tube. The circuit unit comprises a first capacitor, a second capacitor, a first diode, a second diode, a third diode and an inductor. The first diode and the second diode are successively connected in series and are parallelly connected between two ends of the first capacitor. One end of the first capacitor is used as an input-end anode, and the other end is used as an output end. One end of the inductor is connected with one end, which is used as the input-end anode, of the first capacitor; and the other end of the inductor is connected with one end of the second capacitor. A tap end is connected with the anode of the third diode. The other end of the second capacitor is connected with a connecting point between the first diode and the second diode. The cathode of the third diode is connected with the drain electrode of the switch tube. The source electrode of the switch tube is used as an input-end cathode. The gate electrode is used for inputting a control signal which performs controlling for switching on or off the switch tube. The boosting DC converter device based on the tap inductor can realize a relatively high step-up ratio and furthermore has advantages of simple circuit structure, high flexibility and small size.

Description

technical field [0001] The invention relates to the technical field of direct current power converters, in particular to a boost direct current conversion device based on tapped inductors. Background technique [0002] With the development and popularization of distributed power generation systems such as photovoltaic power generation and fuel cells, step-up DC converters (that is, DC-DC converters) are receiving more and more attention. [0003] In the prior art, the commonly used step-up DC converter Boost converter can theoretically achieve a high voltage gain when the duty cycle of the Boost converter is large enough, but in practical applications due to the voltage and current pressure of the device And loss limitation, the duty cycle of the Boost converter is usually not greater than 0.8. In addition, in order to obtain high voltage gain, the cascaded Boost converter can be used to increase the boost ratio, but the cascaded Boost converter is a high-order converter, a...

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Problems solved by technology

In addition, in order to obtain high voltage gain, the cascaded Boost converter can be used to increase the boost ratio, but the cascaded Boost converter is a high-order converter, and its dynamic model and control strategy are not yet mature.

Furthermore, it is realized by using a transformer or coupled inductor with a high turns ratio, but the design of a high turns ratio transformer and coupled inductor is difficult and the loss is large

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