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High-reliability DC-DC switching power supply formed by discrete members

A technology of switching power supply and discrete components, which is applied in the field of high reliability DC/DC switching power supply, can solve the problems of high development cost, difficult reduction of ripple, long development cycle, etc., and achieve light weight, high conversion efficiency and small volume Effect

Inactive Publication Date: 2017-06-20
范洪国
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, most of the DC / DC conversion modules are imported from abroad, which results in high development costs, long development cycles, and difficult reduction of ripples. Some protection measures inside the DC / DC conversion modules do more harm than good to the bombarded products.

Method used

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  • High-reliability DC-DC switching power supply formed by discrete members
  • High-reliability DC-DC switching power supply formed by discrete members
  • High-reliability DC-DC switching power supply formed by discrete members

Examples

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Embodiment Construction

[0013] in figure 1 Among them, the high-reliability DC / DC switching power supply composed of discrete components is composed of a power main loop and a control loop. The power main loop includes input filter, power switch, transformer, output rectifier filter, and the control loop includes sampling isolation circuit and PWM control circuit.

[0014] in figure 2 The input filter circuit has two functions: one is to prevent input noise, and the other is to control the noise generated by the switching power supply and fed back to the input power supply. It is mainly composed of conjugate filter coil L1, polar capacitor C1 and non-polar capacitor C2 and C3. One thing to note here is: non-polar capacitors are best placed close to the voltage input end of the transformer.

[0015] in image 3 In the output rectifier filter circuit, the AC signal output by the transformer is converted into a DC signal. Two Schottky rectifier tubes V1 and V2 are used in the circuit to form a full-wave r...

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Abstract

The high-reliability DC / DC switching power supply composed of discrete parts of the present invention is composed of a power main loop and a control loop. This switching power supply has the characteristics of high isolation, good stability, small size, light weight, high conversion efficiency, etc., and this switching power supply has no protection measures such as overcurrent and overvoltage, which is especially suitable for Shangtian products.

Description

Technical field [0001] The invention relates to a high-reliability DC / DC switching power supply composed of discrete parts. Background technique [0002] The DC / DC switching power supply is a DC stable power supply controlled by a switching method. It is widely used in aerospace ground test equipment and missile weapon products due to its high isolation, good stability, small size, light weight and high conversion efficiency. Most of the secondary DC power supplies used in aerospace systems in the past are composed of input and output filter circuits and DC / DC conversion modules. Among them, most of the DC / DC conversion modules are imported from abroad, which results in high development costs, long development cycles, and it is difficult to reduce ripple. Some protection measures inside the DC / DC conversion modules do more harm than good to the products on the bomb. Summary of the invention [0003] In order to solve the above problems, the present invention designs a high-relia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28
CPCH02M3/28
Inventor 范洪国
Owner 范洪国
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