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Method for regulating variation of output voltage of switching power supply

A technology of output voltage and adjustment method, which is applied in the field of switching power supply, can solve problems such as no consideration, and achieve the effect of reducing damage and reducing inrush current

Inactive Publication Date: 2013-10-30
咸阳华清设备科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the performance of the currently commonly used digital control system for switching power supplies is higher than that of the analog control system, and the stability of the output voltage has been greatly improved in the case of drastic load changes, it generally does not consider how to ensure Stability of output current

Method used

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  • Method for regulating variation of output voltage of switching power supply
  • Method for regulating variation of output voltage of switching power supply
  • Method for regulating variation of output voltage of switching power supply

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Embodiment Construction

[0020] Below in conjunction with embodiment the present invention is described in further detail:

[0021] The invention aims at the situation that the switching power supply generates a large inrush current when the output voltage rises or falls suddenly, and reduces the change rate du / dt of the output voltage through a digital control method to reduce the inrush current, thereby ensuring the normal operation of the equipment. Reduce damage to power supplies and other equipment-related components. In order to reduce the surge current caused by the adjustment of the output voltage of the power supply, the adjustment method of the rising rate and falling rate of the digital output voltage is as follows:

[0022] (1) The digital control system of the switching power supply compares the target setting value of the output voltage every certain time interval T, and the absolute value of the difference Vdlt between the preset value and the previous preset value after the time interv...

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Abstract

The invention relates to a digital-control switching power supply, in particular to a method for regulating variation of output voltage of the switching power supply. When the output voltage of the switching power supply is regulated to increase or decrease, the speed of the increase or decrease of the output voltage is reduced through a digital method, and therefore an impact current caused by regulation of the output voltage is reduced. Due to the adoption of the digital method, the impact current can be regulated within an acceptable range according to the actual needs, and meanwhile the speed regulation is taken into account. The method for regulating the variation of the output voltage of the switching power supply has the advantages of effectively reducing the large impact current generated in the regulation process of the output voltage of the switching power supply, largely reducing the damage to related elements, and guaranteeing the power supply not to trip out caused by large current in the working process and not to affect work. The method for regulating the variation of the output voltage of the switching power supply is suitable for digital-control switching power supplies, particularly large-power switching power supplies with the power of more than 1kW.

Description

(1) Technical field [0001] The invention relates to a digitally controlled switching power supply, in particular to a method for adjusting the output voltage variation of the switching power supply. (2) Technical background [0002] The basic structure of switching power supply is as figure 1 As shown, its control part can be an analog system or a digital system. Traditional switching power supplies generally use analog control systems, and their control components are mainly analog discrete components and integrated operational amplifiers. The cost of this switching power supply is low, but because there are many discrete components, and its performance is easily affected by the ambient temperature, the stability of such a closed-loop control is not good. It is difficult for the analog control system to achieve fine control with a high degree of complexity. For switching power supplies, it is difficult to ensure the stability of the output when the load and output voltage...

Claims

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Application Information

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IPC IPC(8): H02M1/32
Inventor 尤剑鸣章宏康选林
Owner 咸阳华清设备科技有限公司
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