대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1988년도 추계학술대회 논문집 학회본부
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- Pages.388-393
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- 1988
THE GRAPHICAL D-Q TRANSFORMATION OF GENERAL POWER SWITCHING CONVERTERS
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Rim, Chun-T.
(Dept. of Electrical Engineering, Korea Advanced Institute of Science and Technology) ;
- Hu, Dong-Y. (Dept. of Electrical Engineering, Korea Advanced Institute of Science and Technology) ;
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Cho, Gyu-H.
(Dept. of Electrical Engineering, Korea Advanced Institute of Science and Technology)
- 발행 : 1988.11.25
초록
New circuit D-Q transformation concept is introduced to analyze AC converters such as inverters, rectifiers and cyclo-converters with ease. The equivalent linear time invariant circuit is obtained by substituting switches with equivalent turn-ratio variable transformers and changing balanced AC reactors into equivalent DC reactors combined by gyrators. This circuit enables us to utilize the powerful linear system analysis techniques such as Laplace transform otherwise which could not be applied to the time varying switching systems. Direct substitution of switches of DC converters with transformers is shown as a preliminary. Then the modeling procedure is shown for a controlled rectifier-inverter circuit. Finally an analysis example is proposed for a buck-boost inverter and the result is compared with the conventional approach. This approach is applicable to all AC converter families to determine the AC transfer functions and the DC operating points. It is identified that the switching systems are equivalent to the RLC filter circuits with transformers and gyrators.
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