Automation of adjustment stages by high-performance semiconductor converters

• Published in: IOP conference series. Materials Science and Engineering 2018-11, Vol.450 (4), p.42006
• Main Authors: Grigorev, M A, Gryzlov, A A, Katrichek, V S
• Format: Article
• Language: English
• Subjects: Automation; Drilling rigs; Electric drives; Frequency converters; Reliability; Synthesis
• ISSN: 1757-8981; 1757-899X; 1757-899X
• DOI: 10.1088/1757-899X/450/4/042006

In this paper, methods of frequency synthesis of semiconductor converter control are proposed, allowing automation of the commissioning stages of high-performance semiconductor frequency converters. Attention is paid to increasing the reliability of the synthesis of the regulation system using the method of synchronous detection of measured signals. It is shown that the proposed frequency synthesis methods allow us to construct a mathematical model of the object being identified. The proposed generalized methods for the synthesis of current control loops, electromagnetic moment, based on the method of experimental frequency characteristics can be useful for technological objects, which allow the study of frequency characteristics without disturbing the conditions of the process. The proposed method has been quite successfully tested on the example of objects of drilling rigs: electric drive for lifting winch and electric drives for drilling pumps. By increasing the reliability of the synthesis of the current control loops and the electromagnetic torque of semiconductor converters, it was possible to significantly expand the uniform transmission band of the current control loop by about 20%. It is established that an experimental technique for determining the frequency characteristics of CCL has been proposed and tested, which makes it possible to evaluate the capabilities of CCLs of various electric drives and indicates the possibilities for expanding the band of uniform transmission of the frequencies of the CCLs under investigation. On the other hand, the extension of the band of uniform transmission of CCL allows increasing the limiting values of the rotational speed of the motor. This allows you to raise the speed of powerful compressor units without the use of multipliers to 6000 - 9000 rpm.