Mining explosion-proof frequency converter with emergency power supply and control method

Abstract

The invention discloses a mining explosion-proof frequency converter with an emergency power supply and a control method. The explosion-proof frequency converter is composed of an explosion-proof frequency converter box and an explosion-proof battery box. The explosion-proof frequency converter box comprises an explosion-proof shell I, a frequency converter, a DC / DC converter and an EMS controller, and the frequency converter, the DC / DC converter and the EMS controller are mounted in the explosion-proof shell I; the explosion-proof battery box comprises an explosion-proof shell II, a battery unit and a high-voltage distribution box; and the battery unit and the high-voltage distribution box are arranged in the explosion-proof shell II. When the mining explosion-proof frequency converter is powered off, the EMS controller sends a control instruction to the DC / DC converter, the DC / DC converter firstly converts the electric energy stored in the explosion-proof battery box and then supplies power to the direct current bus of the frequency converter, normal operation of the frequency converter is maintained, and the purpose that the frequency converter is not shut down in the power failure is achieved.

Description

technical field [0001] The invention belongs to the field of mining explosion-proof frequency converters, in particular to a mine-use explosion-proof frequency converter with an emergency power supply and a control method. Background technique [0002] Mine explosion-proof inverter is an important equipment in coal mines, which is used to drive important equipment such as local fans, belts, winches and so on. In the known technology, the existing explosion-proof frequency converter is composed of an explosion-proof casing and a frequency converter inside the casing. Disadvantages of the existing explosion-proof inverter: when the existing explosion-proof inverter and its driven equipment, such as the local fan, encounter a power failure on site, it will stop immediately and cannot run. For coal mines, it is very dangerous for the local fan to stop running, because it will cause the gas concentration in the roadway to exceed the limit, and even cause a major accident of gas ...

AI Technical Summary

Problems solved by technology

Insufficiency of the existing explosion-proof frequency converter: When the existing explosion-proof frequency converter and its driven equipment such as local fans encounter a power outage on site, they will stop immediately and cannot operate

For coal mines, it is very dangerous to stop the operation of the local fan, because it will cause the gas concentration in the roadway to exceed the limit, and even cause a major accident of gas explosion

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