Rectifier three-phase power supply-based variable-frequency governor

Abstract

The invention discloses a rectifier three-phase power supply-based variable-frequency governor, which comprises a detection module, a control module, a human-computer interaction module, a three-phase power supply, a phase-shifting transformer and a five-level inverter, wherein the three-phase power supply, the phase-shifting transformer and the five-level inverter are sequentially connected with one another; output ends of the three-phase power supply, the phase-shifting transformer and the five-level inverter are connected with an input end of the detection module; the output end of the detection module is connected with the input end of the control module; the output end of the control module is connected with the input ends of the human-computer interaction module and the five-level inverter; the rectifier three-phase power supply-based variable-frequency governor can carry out real-time monitoring on parameters of a voltage, a frequency, a fault and the like of a motor in a frequency converter, timely grasp the working state of the frequency converter and can timely take corresponding measures to ensure normal operation of the frequency converter according to the parameter change condition.

Description

technical field [0001] The invention relates to a frequency conversion speed regulation system, in particular to a frequency conversion speed regulator based on a rectified three-phase power supply, belonging to the field of frequency conversion speed regulation control. Background technique [0002] Since it was introduced into China in the 1980s, frequency converters, as important automation equipment in energy-saving applications and speed control, have been rapidly developed and widely used. In the practical application of the inverter, the frequency setting method of the inverter is mostly set by the panel or external terminals; At the same time, the location is scattered, the working environment is harsh, and the on-site panel adjustment is difficult to operate, and it is easy to cause problems such as misoperation; and when the analog quantity is adjusted through the external terminal, there are also problems such as low remote adjustment accuracy and inconvenient con...

AI Technical Summary

Problems solved by technology

In the practical application of the inverter, the frequency setting method of the inverter is mostly set by the panel or external terminals; At the same time, the location is scattered, the working environment is harsh, and the on-site panel adjustment is difficult to operate, and it is easy to cause problems such as misoperation; and when the analog quantity is adjusted through the external terminal, there are also problems such as low remote adjustment accuracy and inconvenient control; Frequency control is carried out by the switching value of the external control terminal of the inverter, which belongs to stepped speed regulation, which limits the scope of application

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