| The research of the thesis is carried out around the development of hybrid exciting permanent magnet generator (HEPMG) and its control system. Five parts are included:First of all, the configuration was selected after draw an integrated comparison of among existent structure under appropriate condition. Then the selected configuration is ameliorated.Then to improve the accuracy of electromagnetic calculation, a series of key problems, which affect the calculation accuracy, is studied. Considering the effects of saturation, pole shape, some important coefficients including the effective pole-arc coefficient, the leakage coefficient, the air-gap coefficient are analyzed by electromagnetic method, and a series of useful curves are given. The q-axis and d-axis reactance, in which is parallel structure with several branches, is studied by analytical method. And calculation methods are given. Based on the above studies, HEPMG electromagnetic computer-aided design software is developed and verified by test results.Some key parameters to affect HEPMG performance are studied and some design rules are given. The principle of load distribution and estimate calculation of permanent magnet and electrical exciting are given. Methods of improving the power density and weakening aberration rate of sine wave are research. Being based on the above studies, two prototypes are developed of rated power are 7.5kW and 1.5kW.The digital simulation model of HEPMG system is given and simulation software is programmed. Then operate on performances of HEPMG system are studied in details through simulation. And method to reduce harm of short circuit is analyzed.Finally, proper control method was adapted, according to the theory of HEPMG. And control system is introduced briefly. It was proved by test.
|
PDF Full Text Request