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ABSTRACT 7

I. 서론 9

II. 이론적 고찰 10

A. 연속전류모드의 DC-DC 컨버터 10

1. DC-DC 컨버터 10

2. 벅 컨버터의 구동원리 및 구조 12

3. 출력전압의 맥동 19

B. 불연속전류 모드의 DC-DC 컨버터 21

C. DC-DC 컨버터 설계시 고려사항 25

III. 시뮬레이션 26

A. 시뮬레이션 26

B. 시뮬레이션 결과 고찰 29

IV. 실험 및 결과 32

A. 시스템 구성 32

1. 시스템 구성 32

2. 게이트 드라이브 34

B. DC-DC Converter의 실험 결과 고찰 36

V. 결론 38

참고문헌 40

표목차

Table 1. DC-DC buck converter simulation parameters 29

그림목차

Fig. 1. The basic DC-DC switching converter 10

Fig. 2. The driving principle of the buck converter 12

Fig. 3. Buck converter basic waveforms 13

Fig. 4. Buck converter waveforms 19

Fig. 5. Discontinuous current waveforms of the buck converter 21

Fig. 6. Analysis's process of PSpice 28

Fig. 7. Buck DC-DC converter simulation waveforms 30

Fig. 8. Output voltage by Input voltage 22[V] 31

Fig. 9. Output voltage by Input voltage 18[V] 31

Fig. 10. Buck DC-DC converter circuit 32

Fig. 11. Buck converter system configuration 33

Fig. 12. Square wave generating circuit 34

Fig. 13. Differentiator circuit 35

Fig. 14. Gate drive circuit 35

Fig. 15. Buck converter input voltage & current 36

Fig. 16. Buck converter output voltage & current 37

초록보기

Mankind since the industrial revolution has evolved over two centuries by the development of science and technology, mass production, due to large-scale development is current1y benefiting the rich civilization. In many industrial applications, When the constant voltage DC power is supplied to the load changes to maintain the nominal value of DC voltage control is necessary. DC load is needed to efficient1y convert constant voltage. It is a DC-DC converter.

The DC-DC buck converter is electronics device which converted high voltage to low voltage. The development of technology various electronic devices are widely used DC-DC buck converter using high frequency switching function the DC-DC buck converter is available in medium size and small size.

In this paper, analog method PWM circuit and the DC-DC buck converter had been a design. Using the Pspice simulation tool made a DC-DC buck converter design, theoretical analysis experiments have been to make the actual converter design and the actual converter and simulation is compare the characteristics.