基于DSP的三通道交錯(cuò)并聯(lián)Boost變換器中耦合電感的研究
[Abstract]:The design of coupling inductor symmetry in three-channel boost converter using interleaving parallel magnetic integration technology is a difficult work, based on the basic theory of pulse width modulation. In this paper, the static equivalent inductance and transient response speed of three-channel boost converter are studied under the condition of duty cycle at D _ 2 / 3. The theoretical basis and mathematical calculation are used to verify that the converter can achieve the optimal control purpose under the condition of D 2 / 3. So this paper studies the interleaved parallel magnetic integration theory of three-channel Boost converter and the control mode of PWM technology combined with DSP digital control to complete this work. First of all, the equivalent inductance expressions of the inductor made by magnetic integration technique in the duty cycle D2 / 3 three-channel staggered parallel boost converter are derived, and the static and transient characteristics of the magnetically coupled inductor are analyzed. The advantages of three-phase symmetric coupling inductors are proved. Secondly, two different design schemes are put forward to design the inductance value symmetry of the three-phase "ei" coupling inductor, and the advantages and disadvantages of the two design schemes are compared by quantitative calculation and simulation experiment. Finally, a more accurate scheme for the physical design of the three-phase ei coupling inductor is determined. Finally, according to the better design scheme, the three-phase symmetrical "ei" coupling inductor is fabricated and tested and used in the three-channel staggered parallel boost converter. The correctness of the theoretical analysis and the feasibility of the designed magnetic structure are verified by using the simulation experiment and the prototype circuit experiment of DSP digital control.
【學(xué)位授予單位】:遼寧工程技術(shù)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TM46
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