Intrinsic safety Buck converter parameter design method considering temperature effect

Abstract

The invention discloses an intrinsic safety Buck converter parameter design method considering a temperature effect. The intrinsic safety Buck converter parameter design method comprises the steps that inductive current ripples, output ripple voltage and minimum ignition energy of a Buck converter are given; the input voltage range, the load range, the working temperature range, the output voltage and the working frequency of the Buck converter and the resistance value RC of an equivalent series resistor under the working condition are given; the minimum inductance and the input voltage of the intrinsic safety Buck converter and the minimum capacitance value in the RC dynamic range are calculated; the capacity range of the Buck converter capacitor C and the resistance value range of the equivalent series resistor in the working temperature range are calculated; according to the design parameters, the maximum short-circuit discharge energy and the maximum output ripple voltage are calculated, whether the output intrinsic safety requirement is met or not is judged, and if yes, design is completed; and if not, the RC needs to be reduced or the working frequency needs to be improved, and the steps are repeated until the requirements are met. The output intrinsic safety performance of the converter is effectively improved.

Description

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

AI Technical Summary

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

Images