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Constant current and intrinsic safe power supply

An intrinsically safe power supply, rectification and filtering circuit technology, applied in the direction of electrical components, circuit devices, adjusting electrical variables, etc., can solve the problems of inflexible use, self-heavy, and individual functions cannot be fully realized, so as to improve the flexibility of use and reduce the The effect of self-weight and stable input current

Inactive Publication Date: 2015-03-04
山西八方电气股份有限公司
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Problems solved by technology

[0003] The present invention provides a constant current intrinsically safe power supply in order to solve the problems that the intrinsically safe equipment that requires constant current power supply in the existing mine is heavy, inflexible in use, and individual functions cannot be fully realized.

Method used

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  • Constant current and intrinsic safe power supply

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Embodiment Construction

[0015] Constant current intrinsically safe power supply, including rectification and filtering circuit, switching power supply circuit and overvoltage and overcurrent protection circuit; wherein, the switching power supply circuit includes transformer T, first transient voltage suppressor TVS1, photocoupler infrared receiving tube IC2-2, The first integrated module IC1 of model HP1542 and the first field effect transistor Q1, the overvoltage and overcurrent protection circuit includes the first one-way thyristor SCR1, the third integrated module IC3 and the second one-way thyristor SCR2, the model is HL051D The third integrated module IC3, the triode Q4, the second field effect transistor Q2, the photocoupler infrared emission tube IC2-1, the third field effect transistor Q3, the second transient voltage suppressor TVS2 and the third transient voltage suppressor TVS3;

[0016] The positive output end of the rectification filter circuit is connected to the opposite end of the f...

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Abstract

The invention relates to a mining intrinsic safe power supply, in particular to a constant current and intrinsic safe power supply. The constant current and intrinsic safe power supply comprises a rectification filter circuit, a switching mode power supply circuit and an overvoltage and overcurrent protection circuit, wherein an output end of the rectification filter circuit is connected with an input end of the switching mode power supply circuit; and an output end of a high-power factor switching mode power supply is connected with an input end of the overvoltage and overcurrent protection circuit. During work, an input end of alternating current power supply is connected with an external alternating current power supply, an output end of the overvoltage and overcurrent protection circuit is connected with an input end of intrinsic safe equipment requiring constant current power supply in a mine, and the overvoltage and overcurrent protection circuit outputs direct current meeting requirements to the intrinsic safe equipment requiring constant current power supply in the mine. The constant current and intrinsic safe power supply solves the problems that the conventional intrinsic safe equipment requiring constant current power supply in the mine is large in dead weight and inflexible to operate and certain functions cannot be realized comprehensively, and is suitable for the intrinsic safe equipment requiring constant current power supply in the mine.

Description

technical field [0001] The invention relates to a mine intrinsically safe power supply, in particular to a constant current intrinsically safe power supply. Background technique [0002] Intrinsically safe equipment that requires constant current power supply in underground mines all work in an explosive gas environment, so their power supply must also be packaged in a flameproof housing to meet the working environment requirements of the equipment, which leads to the inherently safe equipment being heavy, Inflexible use and the inability to fully realize individual functions affect the ease of use of intrinsically safe equipment. For this reason, it is necessary to invent a new intrinsically safe power supply for the intrinsically safe equipment that needs constant current power supply under the mine, so as to solve the problem that the intrinsically safe equipment that needs constant current power supply under the existing mine is self-heavy, inflexible in use, and The pr...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02M1/44H02H9/04H02H3/20H02H3/08
CPCH02M3/33523H02H3/08H02H3/20H02H9/04H02M1/44H02M3/33569
Inventor 刘向东
Owner 山西八方电气股份有限公司
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