Development and research of a simulation model of an asynchronous electric drive with a single-phase frequency speed controller
Introduction. This article is devoted to the study of the characteristics of an asynchronous electric drive with a single-phase frequency speed controller when connected to a single-phase supply network. To study the characteristics, the means of computer simulation were used. Materials and Method. At the initial stages of the development of new circuits of frequency converters, in order to assess their characteristics, the use of computer modeling tools is justified. Simulation models allow obtaining the main characteristics of an electric drive and assessing its efficiency. To build the most reliable computer simulation model of an asynchronous electric drive with a single-phase frequency speed controller, the Matlab Simulink software package was used. Result. As a result of the work done, a computer simulation model of a single-phase frequency speed controller for a three-phase asynchronous electric motor has been developed. A study of the characteristics of an electric drive was carried out on the basis of a simulation model. The analysis of the research results has been carried out. It was revealed that a three-phase asynchronous electric motor, which is controlled by a single-phase frequency speed controller, can be successfully used in an electric drive when powered from a single-phase network. Discussion. The operation of asynchronous electric motors puts forward a number of requirement. In particular, a three-phase AC network is required for their operation. In some cases, there is no access to a three-phase AC network and consumers are powered from a single-phase network. In this case, as an alternative to the existing methods of supplying three-phase electric motors, it is possible to use the original circuits of single-phase frequency converters of the vector-algorithmic type. The developed converters are distinguished by their simple design and low cost. In turn, the method of computer simulation shows a high practical value for the study of electric drives in order to minimize financial and time cost. Conclusion. The investigated asynchronous electric drive with a single-phase frequency speed controller when connected to a single-phase supply network can be successfully used in an electric drive when powered from a single-phase network.