Inherent safety switch power supply for mine

An intrinsically safe, switching power supply technology, applied in the direction of conversion equipment with intermediate conversion to AC, irreversible AC power input to DC power output, etc. Easy installation, small size, low power consumption

CN102710151AInactive Publication Date: 2012-10-03XIANGMEI LEADER MINING EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2012-10-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an inherent safety switch power supply for mine. The switch power supply comprises a switch transformer and is characterized in that one end of the switch transformer is connected with an input filter circuit via a full-bridge rectifying circuit, and the other end of the switch transformer is connected with a switch tube via an output rectifying filter circuit and a voltage stabilizing current limiting control circuit; and the switch transformer is directly connected with the switch tube. The inherent safety switch power supply disclosed by the invention is mainly used in a coal mine firedamp environment and other explosive gases environments.
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Description

technical field

[0001] The invention relates to a switching power supply, in particular to a mining intrinsically safe switching power supply. Background technique

[0002] Most of the existing mine-used intrinsically safe DC power supplies use a DC voltage stabilization method, that is, the voltage is stepped down by a rectifier transformer, rectified and filtered by a rectifier bridge, and then the required DC voltage is output through a voltage regulator tube. This kind of equipment consumes a lot of power, has low efficiency, is bulky and heavy, and is very troublesome to install and use, and the protection is single-circuit protection. The mining intrinsically safe switching power supply involved in the present invention has the advantages of small volume, low power consumption, high efficiency, convenient installation, and is designed for double voltage stabilization and double overcurrent protection. Contents of the invention

[0003] The object of the present inve...

Examples

Embodiment Construction

[0008] The present invention and its specific implementations will be described in further detail below in conjunction with the accompanying drawings.

[0009] see Figure 1-2 , the present invention includes a switching transformer, characterized in that: one end of the switching transformer is connected to the input filter circuit through a full-bridge rectifier circuit, and the other end is connected to the switching tube through an output rectifying and filtering circuit, a voltage stabilizing and current limiting control circuit, and the switching transformer It is also directly connected to the switch tube.

[0010] The present invention is composed of an input filter circuit, a full-bridge rectifier circuit, a switching transformer, a switch tube, a voltage stabilizing and current limiting control circuit, and an output rectifying and filtering circuit. The input is an AC 127V or 220V power supply, and the output is two intrinsically safe power supplies, one of which is...