Chained double-bridge self-coupled stepdown topology

A chain-type, self-coupling technology, applied in the direction of instruments, electric variable adjustment, output power conversion devices, etc., can solve the problems of failure mode hazards, low output power, large volume, etc., to achieve the elimination of energy loss, high power density, Solve the effect of low output power

Active Publication Date: 2016-03-30
AEROSPACE CHANGFENG CHAOYANG POWER SUPPLY
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] The invention creates a brand-new circuit topology in the field of switching power supplies at home and abroad, and solves the

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  • Chained double-bridge self-coupled stepdown topology
  • Chained double-bridge self-coupled stepdown topology
  • Chained double-bridge self-coupled stepdown topology

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Embodiment Construction

[0048] Applications in the field of buck conversion:

[0049] The power supply is generally DC280V. Many high-power electronic devices need to provide DC28V voltage. The output power of the original circuit form is 0-600W, but the output power can be increased to 3000W by using the "chain double bridge auto-coupling step-down topology". And small size, light weight, more suitable for the use of the environment.

[0050] The topology of the circuit adopts "chain-type double-bridge auto-coupling step-down topology". The main transformer B of the circuit uses EE55 magnetic core, Q1, Q2, Q3, and Q4 use C2M0160120D, and D1 and D2 use MUR3020. Set the working frequency to 280KHz, the main transformer B adopts the following Figure 10 The output power is 3000W and the measured efficiency is 96.2%.

[0051] Finally, it should be noted that obviously, the above-mentioned embodiments are only examples for clearly illustrating the present invention, rather than limiting the implementat...

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Abstract

The invention relates to a brand-new circuit topology, particularly relates to a chained double-bridge self-coupled stepdown topology, and aims at solving the disadvantage that the traditional stepdown DC converters are low in output power, large in volume, low in efficiency and low in reliability. According to the technology of the chained double-bridge self-coupled stepdown topology, two tubes are used for staggered driving, so that the output power can be enhanced by one time. The high-frequency transformers are designed into a coupling-free chained structure, so that the energy loss of coupling conversion is eliminated and the efficiency is improved. According to the chained double-bridge self-coupled stepdown topology, the stepdown power supplies can be provided with the following advantages under the requirement for same power and electric parameter: the volume is decreased by 50%, the output power is improved by one time, the efficiency is improved by 10% and the efficiency can be up to 96%.

Description

technical field [0001] The invention relates to a positive output step-down DC converter. Background technique [0002] At present, the commonly used step-down switching power supply circuits at home and abroad include BOOST step-down circuit and flyback-based step-down circuit topology. [0003] The main circuit diagram of the BOOST step-down circuit is as follows: figure 1 As shown, the working principle is: the input power stores the energy in the energy storage inductor (L) through the on-off of the power switch tube (Q) and superimposes it with the input voltage, and then transmits it to the output capacitor (C) through the fast recovery isolation diode (D). Complete the depressurization process. [0004] The main circuit diagram based on the flyback buck topology is as follows: figure 2 As shown, when the switch tube (Q) is turned on, the primary coil of transformer B stores energy, and when the switch tube is turned off, the primary energy storage is coupled to th...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/3353H02M3/33592Y02B70/10
Inventor 刘建华高海燕谢振利
Owner AEROSPACE CHANGFENG CHAOYANG POWER SUPPLY
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