Outdoor box type frequency conversion control station

Abstract

The invention provides an outdoor box type frequency conversion control station, which comprises an inner box part and an outer box part, wherein the outer box part comprises a high-voltage input end, a rectifier transformer with a load switch and a protective cover, wherein the load switch is positioned between the high-voltage input end and the rectifier transformer and is used for inputting high-voltage electricity supplied by the outside and connecting or disconnecting a high-voltage power supply; the rectifier transformer is used for reducing the voltage of the input high-voltage power supply and outputting a low-voltage power supply, and the inner box part comprises a low-voltage bus bar, power distribution switches, frequency inverters for the frequency conversion processing of the low-voltage power output by the rectifier transformer and outputting a driving power supply to an external AC motor, an IO control device for controlling the frequency inverters and related equipment, a heat dissipating device for dissipating heat inside the box body and receiving the control of the IO control device, and a box body for accommodating the low-voltage bus bar, the power distribution switches, the frequency converters, the IO control device, the heat dissipating device and other equipment.

Description

technical field [0001] The present invention relates to the motor drive control technology, in particular to the motor drive control technology in which the drive motor is far away from the main control room. Specifically, it is an outdoor box-type frequency conversion control station. Background technique [0002] In the existing technology, such as metallurgical stockyards, wharf stockyards, etc., the site is open, and the on-site drive motor is far away from the main control room. In this case, the motor can be controlled by low-voltage variable frequency drive. However, low-voltage variable frequency drive requires Large-section cables supply power, and the cost is very high. [0003] There is also a scheme of using a high-voltage frequency converter to drive the motor to control the motor, but in this scheme, the cost of the motor, frequency converter and cables is very high. [0004] There is also a scheme of using constant speed motor drive to control the motor. Howe...

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, such as metallurgical stockyards, wharf stockyards, etc., the site is open, and the on-site drive motor is far away from the main control room. In this case, the motor can be controlled by low-voltage variable frequency drive. However, low-voltage variable frequency drive requires Large cross-section cable power supply, the cost is very high

[0003] There is also a scheme of using a high-voltage frequency converter to drive the motor to control the motor, but in this scheme, the cost of the motor, frequency converter and cables is very high

[0004] There is also a scheme of using constant speed motor drive to control the motor. However, the starting current of this scheme is relatively large, and the impact on the power supply system is relatively large. It cannot be started at the same time. The startup time of the entire operation line is relatively long, and the running speed cannot be adjusted.

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