Authors O.G. Mezhakov
Month, Year 08, 2016 @en
Index UDC 681.51
DOI 10.18522/2311-3103-2016-8-3748
Abstract The work is devoted to the study of control processes in pulse-width DC converters. The pulse-width non-insulated step-down DC converter is considered. The purpose of this work is to carry out the synthesis of synergetic controller for pulse-width non-insulated voltage converter and assess the quality of the output voltage transfer characteristic at different loads. Implementation of control algorithms on digital calculators is also the aim. Controllers The synergetic controllers provide an asymptotic stability for pulse-width converters relatively to their desired operating modes, invariance to changes in pulse-width converter load and robustness to their settings change. When the pulse converter functions in a wide range of ambient temperatures, the radio characteristics change under the influence of external factors affecting the stability of the system. Possible random changes in current load, emissions and input voltage falls reduce the mean time between failures (MTBF) of the voltage converter radioelements. The studies have shown the fea-sibility of synergetic controller in switch-mode power supplies in working conditions of uncertain external disturbances. Shown is the advantage of synergetic method in comparison to conventional controllers owing to the implementation of functions of radio parameters dependence on external factors in the synthesized control action. The result is the system stability increase, the radioactive elements "stress" load reduction and MTBF increase. The issue of the practical realization of the synthesized synergetic controller and the step-down non-insulated voltage pulse converter is con-sidered. A comparative analysis of the periphery of 8- and 32-bit microcontrollers is carried out. As a result, defined is the range of microcontrollers capable of meeting the requirements of computing power and the synergetic controller periphery.

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Keywords Pulse width converter; step-down non-insulated voltage converter; method of AKAR; syn-thesis; control; integral adaptation; PID controller; variable structure; microcontroller
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