สำนักราชบัณฑิตยสภา

«“√ “√ √“™∫— ≥±‘µ¬ ∂“π ªï ∑’Ë Ú˜ ©∫— ∫∑’Ë Û °.§.-°.¬. ÚıÙı ¡ß§≈ ‡¥™π§√‘ π∑√å ˜Û˜ ·≈â «„Àâ ∑√“π´‘ ‡µÕ√å Q 1 °— ∫ Q 2 º≈— ¥ °— π∑”Àπâ “∑’Ë µ— ¥µà Õ«ß®√¥â «¬§«“¡∂’Ë Ÿ ß√“« Ú °‘ ‚≈‡Œ‘ √µ´å „π§√÷ Ë ß√Õ∫∑’ Ë ‡À¡“– ¡¢Õß√Õ∫°“√‡ª≈’Ë ¬π·ª≈ß ·√ߥ— π°√–· ≈— ∫¥â “π‡¢â “. °‘ µµ‘ °√√¡ª√–°“» §ÿ ≥ ÿ √æß…å ÿ «√√≥°«‘ π π‘ ‘ µ À≈— ° Ÿ µ√ª√‘ ≠≠“‡Õ° Àâ Õߪؑ ∫— µ‘ °“√ Abstract A Switched-capacitor, Direct-current Power Supply Mongkol Dejnakarintra Fellow, the Academy of Science, the Royal Institute, Thailand A guideline for designing and constructing a low voltage direct current power supply without using a power transformer was presented. The power supply circuit uses one or more sets of capaci- tors and diodes to substitute for the transformer. The author also gives a demonstrative example in designing and constructing a 15-volt, 1-ampere DC power supply with an AC input voltage of 220 volts. Key words : direct current power supply, switched-capacitor Ú. Spencer JD, Pippenger DE. The volt- age regulator handbook. Dallas, Texas: Texas Instruments; 1977. p. 63-76. Û. Williams BW. Power electronics de- vices, drivers and applications. New York: John Wiley & Sons; 1987. p. 309-29. Ù. ©— µ√™— ¬ ◊ ∫Õ‘ π∑√å . °“√ÕÕ°·∫∫·≈– √â “ß ·À≈à ß®à “¬°”≈— ߉øøÑ “°√–· µ√ß‚¥¬„™â µ— « ‡°Á ∫ª√–®ÿ ≈¥·√ߥ— π. √“¬ß“π‚§√ßß“π «‘ »«°√√¡‰øøÑ “ ¿“§«‘ ™“«‘ »«°√√¡‰øøÑ “ §≥–«‘ »«°√√¡»“ µ√å , ®ÿ Ó≈ß°√≥å ¡À“«‘ ∑¬“≈— ¬, °∑¡.; ÚıÙÚ. «‘ ®— ¬Õ’ ‡≈Á °∑√Õπ‘ ° å °”≈— ß, ¿“§«‘ ™“ «‘ »«°√√¡‰øøÑ “ §≥–«‘ »«°√√¡»“ µ√å ®ÿ Ó≈ß°√≥å ¡À“«‘ ∑¬“≈— ¬ ‰¥â ™à «¬ ‡À≈◊ Õ„π°“√«— ¥ ¡√√∂π–¢Õß«ß®√ ·À≈à ß®à “¬°”≈— ߉øøÑ “„πß“ππ’È . ‡Õ° “√Õâ “ßÕ‘ ß Ò. ¡ß§≈ ‡¥™§√‘ π∑√å , ™“µ√’ »√’ ‰ææ√√≥. Õ‘ ‡≈Á °∑√Õπ‘ ° å æ◊È π∞“π. °∑¡: ´’ ‡ÕÁ ¥¬Ÿ ‡§™—Ë π; ÚıÚ˜, Àπâ “ ÒÙı-ˆÛ.