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Soft switching DC/DC converter with less assembly

A DC converter and converter technology, which can be applied to conversion equipment without intermediate conversion to AC, high-efficiency power electronic conversion, climate sustainability, etc. loss, the effect of reducing electromagnetic interference

Active Publication Date: 2005-12-28
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it still has shortcomings, because there are a lot of added parts, so its net size cannot be reduced in some occasions. If the number of parts can be reduced, it can be used in a wider range and obtain more good results

Method used

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  • Soft switching DC/DC converter with less assembly
  • Soft switching DC/DC converter with less assembly
  • Soft switching DC/DC converter with less assembly

Examples

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Embodiment Construction

[0028] Please see image 3 , which is a schematic circuit diagram of a (boost) DC / DC converter 1 with soft switching in the first preferred embodiment of the present invention, and its architecture and operating principle are described below.

[0029] image 3 Among them, the (boost) DC / DC converter 1 with soft switching includes the basic components of the aforementioned DC / DC converter with soft switching: an input capacitor Ci; a main inductor L; a main switch module 11, It includes: a main switch Sm (a MOSFET), with a first terminal (source), a second terminal (drain) and a control terminal (gate); and a resonant capacitor Cr, the first terminal of which is electrically connected to The second end of the main switch Sm is electrically connected to the first end of the main switch Sm; an auxiliary switch module 12 with soft switching includes: an auxiliary switch Sa (a MOSFET) with a first One terminal (source) is electrically connected to a first terminal, a second termi...

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Abstract

The invention consists of an input capacitor, a main inductance and a main switch module that includes a main switch connecting to a resonant capacitor, an auxiliary switch connecting in parallel to main inductance. The main inductance consists of an auxiliary switch, a resonant inductance and a resonant diode whose cathode is connected with main switch, a main diode and an output capacitor. A driving signal is inputted from a driving circuit to make soft switch between main switch and auxiliary switch.

Description

technical field [0001] The present invention relates to a DC / DC converter with soft switching, and more particularly to a soft switching DC / DC converter with relatively few components. Background technique [0002] For known technology one of the present invention, please refer to figure 1 , the circuit is composed of an input capacitor Ci, a main inductor (main choke) L, a switch Sm, a main diode (main diode) Db and an output capacitor Cb electrically connected in parallel with each other. It is a traditional non-isolated boost DC / DC converter (boost DC / DC converter), which is a hard-switching architecture. Therefore, if you want to increase the switching frequency, the switching loss will be greatly increased, and the size of the heat sink needs to be increased. In addition, the problem of electromagnetic interference (EMI) will be aggravated by the increase of the switching frequency. In order to solve this electromagnetic interference The EMI filter required for the pr...

Claims

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Application Information

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IPC IPC(8): H02M3/06
CPCY02B70/10
Inventor 张育铭
Owner DELTA ELECTRONICS INC
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