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DC/DC converting circuit and double-way and multi-quadrant DC/DC converting circuits

A technology of conversion circuit and conversion unit, which is applied in the direction of converting DC power input to DC power output, electrical components, and adjusting electrical variables, etc., and can solve problems such as complex structure of the conversion circuit

Active Publication Date: 2015-07-08
SUNGROW POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the MOS tube rectification DC / DC conversion circuit can improve the conversion efficiency after entering the through state, but in the MOS tube rectification DC / DC conversion circuit, it is necessary to configure an auxiliary power supply for the first power tube and the second power tube respectively. Make the conversion circuit enter the straight-through state, resulting in a more complex structure of the conversion circuit

Method used

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  • DC/DC converting circuit and double-way and multi-quadrant DC/DC converting circuits
  • DC/DC converting circuit and double-way and multi-quadrant DC/DC converting circuits
  • DC/DC converting circuit and double-way and multi-quadrant DC/DC converting circuits

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Embodiment Construction

[0063] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0064] The invention discloses a DC / DC conversion circuit, which has a simple structure and high conversion efficiency.

[0065] see figure 2 , figure 2 It is a structural schematic diagram of a DC / DC conversion circuit disclosed in the present invention. It includes: a DC / DC conversion unit 21, a bootstrap drive unit 22 and a controller (not shown in the figure).

[0066] in:

[0067] The DC / DC conversion unit 21 is used to convert the input voltage to a ...

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Abstract

The invention discloses a DC / DC converting circuit which comprises a DC / DC converting unit, a bootstrapping driving unit and a controller. The DC / DC converting unit comprises a first power tube and a second power tube. The bootstrapping driving unit comprises a driving chip, a diode and a bootstrapping capacitor. The diode, the bootstrapping capacitor and the first power tube form a charging loop. The bootstrapping capacitor provides driving charges for the second power tube. Under the situation that input voltage meets preset conditions, the controller lowers the switching frequency and the duty ratio of the first power tube, and during first power tube connecting, charges charged into the bootstrapping capacitor can maintain driving charges needed by the second power tube. The DC / DC converting circuit is simple in structure and high in converting efficiency. The invention further discloses a double-way DC / DC converting circuit, a two-quadrant DC / DC converting circuit and a four-quadrant DC / DC converting circuit.

Description

technical field [0001] The invention belongs to the technical field of DC / DC converters, in particular to DC / DC conversion circuits, bidirectional and multi-quadrant DC / DC conversion circuits. Background technique [0002] There are two main types of DC / DC conversion circuits at present, one is diode rectification type, and the other is MOS tube (metal-oxide-semiconductor field effect transistor) rectification type. figure 1 A step-up DC / DC conversion circuit is shown. In the diode rectification type DC / DC conversion circuit, due to the large conduction voltage drop of the diode, the conduction loss of the conversion circuit is relatively large, and the conversion efficiency is low. At present, MOS tube rectification type DC / DC conversion circuits are mostly used. [0003] In order to improve the conversion efficiency of the conversion circuit, during the operation of the MOS tube rectification type DC / DC conversion circuit, when the input voltage reaches the output voltag...

Claims

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Application Information

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IPC IPC(8): H02M3/155H02M1/08
CPCH02M1/088H02M3/155
Inventor 崔开涌胡兵薛丽英刘宝其姜安营
Owner SUNGROW POWER SUPPLY CO LTD
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