Abstract
The switch reluctance generator is one of the types of electric machines for autonomous power plants. The creation of a switch reluctance generator with a new method of excitation and switching phase winding in natural mode is the result of the study of electromagnetic processes of the switch reluctance generator. The new principle of exciting phase windings is based on the operating features of such electrical machines. One of them is the trapezoidal form of phase voltages. That is, this technical solution eliminates the need for tracking and switching phase currents depending on the position of the rotor. The winding is excited by switching capacitors of the idle phase. This can greatly simplify and reduce the cost of electronic control equipment of the switch reluctance generator. Due to the novelty of the design, neither foreign nor domestic scientists have ever investigated the considered technical solution. This article presents a mathematical model of a valve-inductor generator with capacitor excitation and thyristor control of the excitation current. The regulation of the excitation current is carried out by changing the ratio between the half-periods of the current transmitted by the thyristors and half-periods of the voltage applied to them. The mathematical model is created in a dynamic combination of ANSYS Maxwell and ANSYS Simplorer. The authors conducted an interdisciplinary calculation. The calculation results are given in the article in the form of time dependences of currents and EMF of windings and capacitors of excitation. As a result of the research, an experimental sample of a switch reluctance generator with capacitor excitation and microprocessor control was designed and manufactured at the enterprise NPP Resonance LLC. The oscillograms recorded on the test bench to a large extent coincide with the calculated dependences of currents and voltages, which confirms the adequacy of the model.
Keywords
Autonomous power plant, switch reluctance generator, computer model, finite element model, electric machine, electric current, EMF.
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