Abstract
This paper deals with the computation of the performance characteristics of the single-phase self-excited induction generator by field–circuit method. It presents and compares previously unpublished results—self-excitation and no-load characteristics of the generator for different rotor speeds, and complete load steady-state performance characteristics for various types of the core materials. The discrepancies between the performance characteristics of the generator for the catalog’s magnetization curves of different types of electrical sheets and for an actual magnetic core of the generator for self-excitation transients and load steady-state are presented. The results may be useful for designing new constructions of single-phase self-excited induction generators.
Highlights
Single-phase self-excited induction generators (SP-Self-excited induction generators (SEIG)) driven by a small hydro or wind turbine may be utilized as an auxiliary source of energy in households, or as a primary electrical energy source in remote areas
Withregard regardto to the the considerable considerable differences differences between between the the magnetization magnetization curve of the thegenerator’s generator’s laminated that an electrical sheet, this paper the presents the curve of laminated corecore andand that of an of electrical sheet, this paper presents simulation simulation study of the performance characteristics of the single-phase self-excited induction study of the performance characteristics of the single-phase self-excited induction generator based on generator based computations on the field–circuit steel cores made electrical sheets, only the field–circuit for steelcomputations cores made offor electrical sheets, onlyoftaking into account their taking into account theircurves different magnetization curves given by the manufacturers
When applying other kinds of electrical sheets, e.g., M330, M470, M530 and M700, which are commonly used for laminated iron cores in induction machines (Figure 6), very similar waveforms of self-excitation voltage and steady-state load characteristics of the generator were obtained, since the magnetization characteristics of electrical sheets are close to each other (Figure 7)
Summary
Single-phase self-excited induction generators (SP-SEIG) driven by a small hydro or wind turbine may be utilized as an auxiliary source of energy in households, or as a primary electrical energy source in remote areas. Despite the fact that they have an inherently unsatisfactory frequency and voltage regulation, their construction is robust and manufacturing as well as maintenance costs are low They can be employed in simple or more complex small power systems. The method can be implemented inet a low-cost al., for an induction generator with a single-phase output based on a three-phase induction. The obtained results indicate that thegeneration method allows the generation at a under a variable prime mover speed, while the voltage regulation needs some improvement, e.g., by constant frequency under a variable prime mover speed, while the voltage regulation needs some the application e.g., of a by closed-loop control.
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