A Parameter Design Method of Intrinsically Safe Buck Converter Considering Temperature Effect

A temperature effect and parameter design technology, applied in the field of converters, can solve problems such as potential safety hazards and increased energy released by converters, and achieve the effects of high reliability, reduced margins, and improved output intrinsically safe performance

Active Publication Date: 2022-06-17
秦智电子信息科技(深圳)有限公司
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  • Abstract
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Problems solved by technology

When the temperature rises, the capacitance value of the capacitor increases, and the energy released when the converter is short-circuited increases, resulting in potential safety hazards

Method used

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  • A Parameter Design Method of Intrinsically Safe Buck Converter Considering Temperature Effect
  • A Parameter Design Method of Intrinsically Safe Buck Converter Considering Temperature Effect
  • A Parameter Design Method of Intrinsically Safe Buck Converter Considering Temperature Effect

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Experimental program
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Embodiment Construction

[0119] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0120] The present invention is a method for designing parameters of intrinsically safe Buck converters considering temperature effects. The Buck converters are as follows: figure 1 As shown, including switch tube VT, diode VD, filter inductor L, output filter capacitor C, the equivalent series resistance R of C C , load resistance R, Buck converter input voltage is U i , the output voltage is U o , including as figure 2 The following steps are shown:

[0121] Step 1: Given the inductor current ripple Δi of the Buck converter L , output ripple voltage V PPB and the minimum ignition energy W B ;

[0122] Output ripple voltage V PPB Take the output voltage U of the Buck converter o 2% of;

[0123] Minimum ignition energy W B for:

[0124]

[0125] In formula (1), W B is the minimum ignition energy, C B is the capacitor correspon...

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Abstract

The invention discloses an intrinsically safe Buck converter parameter design method considering the temperature effect, including: given the inductor current ripple, output ripple voltage and minimum ignition energy of the Buck converter; Input voltage range, load range, operating temperature range, output voltage, operating frequency and the resistance value R of the equivalent series resistance C ; Calculate the minimum inductance and input voltage and R of the intrinsically safe Buck converter C The minimum value of capacitance within the dynamic range; calculate the capacity range of Buck converter capacitor C and the resistance range of equivalent series resistance within the operating temperature range; calculate the maximum short-circuit discharge energy and maximum output ripple voltage according to the above design parameters, and judge whether they meet Output intrinsically safe requirements, if satisfied, the design is complete; if not satisfied, it is necessary to reduce R C Or increase the working frequency and repeat the above steps until the requirements are met. The invention effectively improves the output intrinsic safety performance of the converter.

Description

technical field [0001] The invention belongs to the technical field of converters, and in particular relates to a parameter design method for an intrinsically safe Buck converter considering temperature effects. Background technique [0002] Nowadays, coal mines, petrochemical enterprises and other enterprises pay more and more attention to production safety. The production environment of these enterprises is very complex, often accompanied by flammable and explosive gases such as gas. Therefore, various electronic equipment is required to monitor the working environment in real time. The power supply must meet the explosion-proof requirements, and intrinsic safety is the best explosion-proof form at present. Therefore, it is of great significance to study the intrinsically safe power supply suitable for dangerous environments such as coal mines and petrochemicals. [0003] Intrinsically safe switching power supplies have the advantages of small size, high efficiency, light ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155
CPCH02M3/155
Inventor 皇金锋韩梦祺曹哲
Owner 秦智电子信息科技(深圳)有限公司
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