Frequency conversion control device and explosion-proof frequency conversion motor with it

Abstract

The invention discloses a variable frequency controller and an anti-explosion variable frequency motor with the same. The variable frequency controller comprises a direct current laminating layer bus bar, multiple single phase variable frequency modules connected with the direct current laminating layer bus bar, an inner water cooling unit for cooling the single phase variable frequency modules, and multiple direct current filter capacitor groups. According to the variable frequency controller for the anti-explosion variable frequency motor, the single phase variable frequency modules and the direct current filter capacitor groups are arranged in a laminating mode, so the structural compactness of the variable frequency control device in the length, width and height space is improved, the size of the variable frequency controller is reduced, the structure of the variable frequency controller is enabled to be more compact and reasonable, the electrical distance between a high-voltage element and a shell is favorably increased, an electrical insulation protection device is favorably additionally arranged around the high-voltage element, and the high-voltage insulation performance of the variable frequency controller is improved.

Description

technical field [0001] The invention relates to the technical field of explosion-proof frequency conversion, in particular to a frequency conversion control device and an explosion-proof frequency conversion motor equipped with it. Background technique [0002] The frequency converter is a conversion device that converts power-frequency alternating current into frequency-adjustable alternating current by using the on and off functions of semiconductor power devices. The device first converts the power frequency alternating current into direct current, and then converts the direct current into frequency-adjustable alternating current to drive the load. Considering that the underground working environment such as coal mine has the characteristics of narrow space, humidity, and flammable and explosive components in the air, general-purpose frequency converters are strictly prohibited to be used in underground. Explosion-proof frequency converter is the product for frequency mo...

AI Technical Summary

Problems solved by technology

This connection method has the following disadvantages: the overall space occupation is large, wiring is inconvenient, the electromagnetic radiation of the connecting cable between the inverter and the motor interferes with the operation of peripheral equipment, and the cable between the inverter and the motor is long, which will cause reflection and superposition of harmonics and improve Peak voltage, easy to damage the motor insulation, poor heat dissipation of the inverter and the motor in the mine, etc.

[0004] In addition, due to volume limitations, the voltage level of explosion-proof inverters can only be within 1140V, which cannot meet the needs of coal enterprises for high-voltage and high-power inverters

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