DIODE EXCITERS OF A BRUSHLESS MEDIUM POWER SYNCHRONOUS GENERATOR

Authors

DOI:

https://doi.org/10.20535/1813-5420.4.2022.273435

Keywords:

diode, exciter, brushless, synchronous, generator, calculation method.

Abstract

The aim of the work is a comparative analysis of the parameters of the diode exciter of a brushless synchronous generator of medium power on the number of pole pairs of an auxiliary electric machine, the development of recommendations for choosing the number of pole pairs of an auxiliary electric machine and the design of the exciter.

An improvement of the automated method of electromagnetic calculation of the exciter of a brushless synchronous machine has been carried out. The diode exciters of a brushless synchronous generator with a power of 250 kW with the number of pole pairs p = 2 based on a three-phase bridge rectifier and an auxiliary electric machine of a synchronous type with different numbers of pole pairs are compared. At the first stage, a preliminary electromagnetic calculation of the auxiliary electric machine is performed, taking into account the initial value of the relative magnitude of the resulting electromotive force, the allowable values ​​of inductions in all sections of the magnetic circuit in in forced mode, the length of the magnetic circuit and the rotor winding support are determined. According to the results of the calculation of the rectifier model in the quasi-steel mode of operation, the relative value of the resulting electromotive force of the auxiliary electric machine is specified.

At the first stage, a preliminary electromagnetic calculation of the auxiliary electric machine is performed, taking into account the initial value of the relative magnitude of the resulting electromotive force, the allowable values ​​of inductions in all sections of the magnetic circuit in in forced mode, the length of the magnetic circuit and the rotor winding support are determined. According to the results of the calculation of the rectifier model in the quasi-steel mode of operation, the relative value of the resulting electromotive force of the auxiliary electric machine is specified pB = 4.

References

Glebov I. A. Scientific bases of systems designing of excitation of powerful synchronous machines – Leningrad: Science. – 1988. – 322 p. [Rus]

GOST 21558-2000 / Interstate standard: Excitation system for turbogenerators, hydrogenerators and synchronous compensators // General specifications. – Date of introduction 2003–07–01.

Planning of electric machines: textbook for the institutes of higher / pod red. I.P. Kopilova. – 4-e izd., perer. i dop. – M.: Izdatelstvo Jurajt, 2011. – 767 p

Galinovskiy O. Parameters and characteristics of semi-conductor rectifiers of valve generators // Mountain electromecanics and automatics: scientific and technical collection. – 2012.– release 88 – pp. 48-54.

Galynovskiy O., Lenska O., Melnik N. Direct frequency converter with artificial and natural commutation for brushless asynchronized machines // Electrical Engeneereng and Eltctromechanics. – 2015. – № 5. – pp. 23-30.

Galynovskiy O., Dubchak Y., Lenska O. Comparative analysis of diode and thyristor exciters of brushless synchronous machines // Bulletin of the National Technical University «KhPI». Series: Problems of electrical machines and apparatus perfection. – Kharkiv. NTU «KhPI». – 2019. – №2. – pp. 41-45.

Published

2023-09-18

Issue

Section

MONITORING, DIAGNOSTICS AND MANAGEMENT BY ENERGY PROCESSES AND EQUIPMENT