Explosion suppression and intrinsically safe type frequency conversion and speed regulation integral machine with 3300V for mine

Abstract

The invention discloses an explosion suppression and intrinsically safe type frequency conversion and speed regulation integral machine with 3300V for a mine. The frequency conversion and speed regulation integral machine comprises an electric motor and a frequency converter, wherein the frequency converter is arranged in the upper part of the electric motor, a motive force power supply cavity is arranged on the rear end of the electric motor, a control module which is electrically connected with the frequency converter is arranged on a casing of the frequency converter, a frequency-converted power and energy storage module is arranged inside the frequency converter, and the electric motor is a multi-winding electric motor. The frequency-converted power and energy storage module of the explosion suppression and intrinsically safe type frequency conversion and speed regulation integral machine with 3300V for the mine is distributed in a layered shape from bottom to top, and thus the overall size of the frequency converter is reduced. A multi-circuit independent coil group is adopted for the multi-winding electric motor, each independent coil group can be independently matched with a power supply with the same circuit number, thus the requirement of simultaneous input of multiple power supplies is met, the problem of outputting by the electric motor which is used for matching with the multiple power supplies of the frequency converter is solved, and the matching of the electric motor and multiple output of the frequency converter is realized. The multiple output is adopted for the frequency converter topology structure of the frequency converter, so that the output voltage of each circuit is relatively decreased, and the requirement of a withstand voltage of a power appliance is further lowered.

Description

technical field [0001] The invention relates to a variable frequency motor, in particular, a 3300V mining explosion-proof and intrinsically safe frequency conversion and speed regulation integrated machine. Background technique [0002] At present, the volume of frequency converters used in underground coal mines is large, especially the problem of large volume of 3300V frequency converters has not been solved, which has caused serious constraints to the miniaturization of frequency converters. [0003] If the frequency converter adopts the form of dual or multi-channel output, it can effectively solve the volume problem of the frequency converter. The traditional motor winding form, such as Figure 1-2 As shown, taking the star connection as an example, the stator has 72 slots, three-phase windings, four branches for each phase, and the coil span is 1-16. Inverter in the form of one-way output forms a complete set; if one inverter is used to control multiple motors in serie...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the fact that the current frequency converter is large in size and takes up underground space, and the frequency conversion motor cannot be matched with it when performing multi-channel output, resulting in the failure of the frequency converter to work well. High voltage withstand requirements, complicated topological structure, large structure, high cost of power devices, simple structure of two-level inverter circuit but large output harmonics, etc., designed a 3300V mine flameproof and intrinsically safe type Frequency conversion and speed regulation all-in-one machine

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