Switching value control method for high-voltage frequency converter and control plug-in thereof

Abstract

The invention relates to a switching value control method for a high-voltage frequency converter and a controller thereof; a switching value input measurement circuit of the high-voltage frequency converter is arranged at the input end of the high-voltage frequency converter to collect an input switch value signal of the high-voltage frequency converter, and the input switch value signal of the high-voltage frequency converter is accessed to a logical controller through signal amplitude decreasing, rectifying, filtering and isolating treatment; and the logic controller emits a control instruction after operation processing to control switch-on and switch-off of an external signal after being processed through the switching value input measurement circuit about potential conversion, isolating, filtering and relay isolation. In the switching value control method for the high-voltage frequency converter, an output switching value self-checking part is arranged; the output switching valueself-checking part performs amplitude decreasing and isolation to the output control switching value signal to feed in a logic processor to output the switching value state to feedback the output state to the logic processor through a feedback circuit, so as to realize switching value self-checking; moreover, the logic processor is communicated with a master controller of the high-voltage frequency converter through an optical fiber.

Description

technical field [0001] The present invention relates to a control method and structure of electrical components, in particular to a switching value control method and a control plug-in of a high-voltage frequency converter, and relates to a high-voltage frequency converter starting, stopping, resetting, emergency stop, etc. in the frequency converter. The measurement and control technology of key switch signals belongs to the field of measurement and control technology. It is mainly used in high-voltage frequency converters. Background technique [0002] At present, the whole world is troubled by energy shortage, and the energy situation in my country is particularly severe. With the rapid development of China's economy, energy has become a bottleneck restricting economic growth, saving energy and reducing consumption has become a serious concern of the country and enterprises. The high-voltage frequency converter with ideal energy-saving effect and speed regulation perfor...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiency that the existing high-voltage frequency converter is not strong enough to resist the strong interfe

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