Equipped with intrinsically safe mine power supply to eliminate spark energy

Abstract

The invention discloses a mine intrinsically safe power supply with eliminating spark energy, comprises an intrinsically safe power supply body and a linear choke coil arranged in an explosion-proof housing, the positive electrode of the intrinsically safe power supply body is connected with one end of a linear choke coil inductance coil L1, the other end of the inductance coil L1 is connected with a positive electrode output terminal of the power supply, the positive electrode of the diode D1 is connected with the positive electrode output terminal of the power supply and the negative electrode is connected with the positive electrode of the intrinsically safe power supply body in parallel at both ends of the inductance coil L1; A negative electrode of an intrinsically safe power supply body is connected to one end of a linear choke coil inductance coil L2, At that other end of the inductor coil L2, a negative electrode output terminal of the power supply is connected, and a damp diode D2 is connected in parallel to both ends of the inductor coil L2. The positive electrode of the damping diode D2 is connected with the negative electrode of the intrinsically safe power supply body,and the negative electrode is connected with the negative electrode output terminal of the power supply. The invention has the advantage that the output carrying capacity of the intrinsically safe power supply for mining is improved.

Description

technical field [0001] The invention relates to a mine intrinsically safe power supply, in particular to a mine intrinsically safe power supply capable of eliminating spark energy. Background technique [0002] According to the requirements of the national standard GB3836, the power supply of electrical equipment used in underground coal mines must meet the requirements of intrinsically safe power supply. With the rapid development of the intelligentization of the Internet of Things, many underground coal mine equipment have added intelligent automatic control electrical equipment, so the demand for output power of intrinsically safe power supplies is increasing. Existing intrinsically safe power supplies used in coal mines, in order to reduce the spark energy that occurs when electrical equipment is loaded and short-circuited, all adopt the method of outputting series connection resistors to limit the power supply current, thereby consuming the spark energy; The way of con...

AI Technical Summary

Problems solved by technology

Existing intrinsically safe power supplies used in coal mines, in order to reduce the spark energy that occurs when electrical equipment is loaded and short-circuited, all adopt the method of outputting series connection resistors to limit the power supply current, thereby consuming the spark energy; The way of connecting resistance in series consumes too much energy, which reduces the load capacity of the intrinsically safe power supply and limits the total output power of the intrinsically safe power supply

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