Study Of Inductive Load Effect In Boost Converter

The theory of nonlinear system provides a theoretical foundation for the power electronic technology. It provides a good reference to solve actual problen(?)s of power electronics technology. The way of dealing with the nonlinear model is ap(?)lied to the analysis of power electronic circuits. It makes great effect to understand chaotic phenomena and the stability of entire circuit system and it also makes very positive significance in avoiding, producing, controlling or enhancing chaos in power electronics circuits.In recent years, with the development of switching power technology, power switching converters have more and more widely application in real life. However, it also makes great problems such as power loss, low output efficiency, great difference between theoretical and practical in practical engineering applications. This paper analyses the disturbances components of energy storage device and load in main circuit based on the practical application of switching converter. It includes parasitic resistance in inductance and perceptual load in the complex output because high-power electrical products have inductive load. When current changes rapidly, it will produce electromotive force voltage and cause the power overload in a flash. It also may produce a strong effect to resistance and result in reactive power consumption. It will absorb the output electricity, pollute the input signal or cut down the life of power supply.Voltage ahead of current is the main characteristic of inductive load. The system's equation of state based on inductive load characteristics and parasitic resistance characteristics is established firstly in this paper. Then the inductive load Boost converter's Matlab/Simulink numerical simulation model is constructed. Inductive resistance load value under the selected stability initial values is changed step by step to simulate and obtain furcating charts under the different inductance parameter. The system begins to show instability phenomenon under the consideration of circumstance of inductive load. As the inductive load increasing, stability of the whole system significantly decreases. Through constructing discrete time mapping equations of Boost converter and calculates jacobian matrix's characteristic value at the balance point, the theoretical analysis is consistent with the value simulation result. It indicates that the Boost converter load parasitic inductance has an important affection to the system's stability, namely the inductance load's change may cause the furcating behavior. The conclusions of this paper play a very active role in the analysis of the actual circuit design. Switching boost converter's load effect has great effect on input phase, stability of small signal, ratio of input and output impedance, and the ratio of Boost converter's output efficiency. The important influence to the system's stability from parasitic inductance mentioned in this paper provides a reference for converter's load design and improving the stability of converter.