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Intrinsically safe power supply and intrinsically safe transformer module

An intrinsically safe and intrinsically safe technology, applied in the field of switching power supplies, can solve problems such as transformers not meeting safety requirements, and achieve the effect of improving safety and reducing failure

Inactive Publication Date: 2020-06-05
ZHEJIANG SUPCON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current transformers do not meet intrinsic safety requirements

Method used

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  • Intrinsically safe power supply and intrinsically safe transformer module
  • Intrinsically safe power supply and intrinsically safe transformer module
  • Intrinsically safe power supply and intrinsically safe transformer module

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Embodiment Construction

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] When electrical equipment is used in hazardous areas, explosion-proof design and certification are required. Intrinsically safe equipment is a commonly used type of explosion protection for electrical equipment. To design electrical equipment as intrinsically safe equipment, it is necessary to add targeted protection circuits accordin...

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Abstract

The invention provides an intrinsically safe switching power supply and an intrinsically safe transformer module. The intrinsically safe switching power supply based on a Buck circuit comprises the Buck circuit and an intrinsically safe protection circuit. The Buck circuit comprises a controllable switch, a diode, an inductor and an output filter capacitor, and the intrinsically safe protection circuit is connected to the two ends of the inductor in parallel and used for clamping the voltage at the two ends of the inductor and avoiding abnormal high temperature or sparks caused by too high voltage at the two ends of the inductor. The intrinsically safe protection circuit comprises two voltage stabilizing branches, and each voltage stabilizing branch comprises two voltage stabilizing diodeswhich are reversely connected in series, so that each voltage stabilizing branch can realize a bidirectional voltage clamping effect. Moreover, the risk of failure of the whole intrinsically safe protection circuit caused by failure of a protection device can be reduced by adopting the two voltage stabilization branches, so that the safety of the switching power supply is further improved.

Description

technical field [0001] The invention belongs to the technical field of switching power supplies, and in particular relates to an intrinsically safe power supply and an intrinsically safe transformer. Background technique [0002] With the development of industry and the advancement of automation technology, the application of industrial control systems is becoming more and more extensive, including many dangerous and explosive areas, so the safety requirements for industrial control systems are getting higher and higher in many occasions. [0003] For industrial control systems used in hazardous areas, a common type of explosion protection is intrinsically safe. Intrinsically safe equipment needs to evaluate all circuits in the system and design according to the requirements of intrinsically safe standards. The energy storage element in the circuit is the focus and difficulty of evaluation and design. If a large amount of energy in the energy storage element is suddenly rel...

Claims

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Application Information

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IPC IPC(8): H02M1/32
CPCH02M1/32
Inventor 陈宇陈凌霄杨振国戴晨阳
Owner ZHEJIANG SUPCON TECH
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