Abstract
The use of computer equipment in the form of industrial controllers in the control systems of automated electric drives leads to the fact that standard methods and techniques for numerical simulation of such systems do not provide sufficiently reliable results. The feature of such systems is different mathematical description of the digital control system and the analog power section of the electric drive. The article proposes a modeling technique which takes into account the specifics of construction of modern electric drives.
Highlights
The emergence of fully controlled power semiconductor switches capable of switching sufficiently large currents at sufficiently large voltages, as well as development of sufficiently fast microcontrollers and industrial controllers, made it possible to switch to commercial production of automated electric drives (ED) with digital control systems in the 90s of the 20th century
Modern semiconductor controlled energy converters are discrete devices, the modulation frequencies of such keys are much higher than the quantization interval of the digital control system, especially if the latter is implemented by software
After output the control signal in the current quantization cycle and until the cycle, the system will be in the open state, but this is what happens in computer numerical control (CNC) systems
Summary
The emergence of fully controlled power semiconductor switches capable of switching sufficiently large currents at sufficiently large voltages, as well as development of sufficiently fast microcontrollers and industrial controllers, made it possible to switch to commercial production of automated electric drives (ED) with digital control systems in the 90s of the 20th century. The performance of modern controllers allows implementation of very complex control algorithms (with appropriate power supply from the power section of ED). The complexity of such systems implies that their investigation usually begins with construction of a mathematical model and analysis of its behavior. In this case, the electromechanical energy converter is a continuous (analog) part of the system, described by a system of differential equations. The study of such ED systems began from the moment of their appearance [1–10] and continues at present [11–17]; during study of these systems by the method of mathematical modeling, they do not take into account this feature
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