Converter transformerelectromagnetic field-fluid-temperature fieldcoupling calculation method

Abstract

The invention relates to a converter transformerelectromagnetic field-fluid-temperature fieldcoupling calculation method. Firstly, it is supposed that temperature distribution is uniform, units adopt loss and magnetization characteristic curves at the same temperature, magnetic field distribution and loss are analyzed by adopting an electromagnetic field value method, the loss is transferred to a fluid-temperature field calculating unit by utilizing high-precision rapid node data mapping algorithm; the nonuniformity of heat source distribution and the temperature influence on oil motion viscosity are considered, and fluid-temperature field distribution is analyzed by adopting a fluid-temperature field value calculation method; then a temperature field calculation result is mapped to magnetic field partition unit nodes by utilizing a rapid heterogeneous grid node data mapping algorithm, magnetization characteristic data in an electromagnetic field are corrected, magnetic field distribution and its loss under harmonic excitation are re-calculated, and further fluid-temperature field distribution is calculated by utilizing loss; cyclical iteration of electromagnetic field-fluid-temperature field is constantly performed till convergence conditions are met, and the temperature field distribution inside a converter transformer is obtained.

Description

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AI Technical Summary

Benefits of technology

The technical effect of this patented technology compared to current methods for studying inductive power transmission (IPT) converters by calculating their losses caused due to changes made during operation or environmental factors such as ambient temperatures. By considering these influences over the coolant flow within the device's structure, we aimed at accurately predicting how well it will perform under various conditions without losing its ability to transmit signals effectively. Additionally, our researchers found that adding certain materials into specific parts of an IPL design could improve performance even more than traditional designs.

Problems solved by technology

Technological Problem: Current Converter Transformer Temperatures Analysis methods have limitations due to factors like thermal conductivity and eddy currents caused by the use of iron cores and metals within them. These issues lead to imbalanced temperatures and poor cooling performance of the device's structure. Additionally, there are difficulties associated with calculating the distributed power quantity and temperature fields throughout the entire system because these calculations require knowledge about both the location where the devices operate well and how much energy input occurs through the air gap.

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