The Research On The Theory Of Magnetic Integration And Its Application In Multiple Magnetic Circuit Transformers

Now, the auxiliary power on subway vehicles mostly takes use of bi-inverters, which have two output transformers and a huge bulk.Transformers can reduce the bulk of the auxiliary power considerably by magnetics integration, for the primary axial fission winding can help integrate two transformers, and series connection with balancing reactor at the primary and with low-pass filter at the secondary can help integrate several magnetics. So, 168kVA double axial fission and multiple magnetic circuit transformer via integrated magnetics are studied in this paper.How to design winding for a transformer not only to realize the integration of several magnetics on structure but also to satisfy the requirement of auxiliary power on performance after it adopts magnetic integration? We answer this question as follows:1. the status of the development and study on integrated magnetic at home and abroad is introduced, and the principles of magnetic integration for multi-inverter are stressed. Then the some important parameters are calculated theoretically. This paper does some simulation on macro auxiliary power system via the software of Matlab\simulink2.this paper discusses the basis of Ansys finite element analysis on both the electromagnetic field and the temperature field. After a simulated sample is given, we compute on this sample coupling analysis and steady non-linear analysis. By contrast with the experimental outcome of short circuit, we make certain that steady non-linear analysis should be used to analyze a true model. And then, we confirm the external conditions of finite element heat analysis after analyzing the cooling ways of multiple magnetic circuit transformers.3.we do short circuit analysis upon multiple magnetic circuit transformers by use of steady non-linear analysis and get the leakage reactance respectively between high voltage and high voltage,high voltage and low voltage,two high voltage and low voltage,low voltage and high voltage and low voltage and two high voltage. What's more, we do finite element analysis upon the temperature field of transformers and according to its distribution we get the wind speed to forced air cooling.4.we compare the computed outcome of simulation with the manufacturer's...