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«“√ “√ √“™∫— ≥±‘ µ¬ ∂“π ¡ß§≈ ‡¥™π§√‘ π∑√å 107 ªï ∑’Ë ÛÚ ©∫— ∫∑’Ë Ò ¡.§.-¡’ .§. Úıı Abstract A High-frequency Switched-capacitor, DC Power Supply Circuit Mongkol Dejnakarintra Fellow of the Academy of Science, The Royal Institute, Thailand This article presents a design and construction of a 15-kHz switched-capacitor, DC power supply circuit based on adaptation from a 50-Hz switched-capacitor, DC power supply circuit described in previously published articles. Experimental results from the new circuit show that, given the same DC power output, this 15-kHz circuit has approximately the same efficiency as the 50-Hz circuit but has a smaller size and weight as expected. Key words : DC power supply, capacitor, high frequency ‚§√ß°“√√≥√ߧå çªï Úıı ‡ªì πªï ¿“…“‰∑¬ ‡©≈‘ ¡æ√–‡°’ ¬√µ‘ ‡π◊Ë Õß„π‚Õ°“ ¡À“¡ß§≈ ‡©≈‘ ¡æ√–™π¡æ√√…“ ¯ æ√√…“ ı ∏— 𫓧¡ Úııé √“™∫— ≥±‘ µ¬ ∂“π√à «¡°— ∫Àπà «¬ß“π¿“§√— ∞·≈–‡Õ°™π ‰¥â ·°à ”𗠰𓬰√— ∞¡πµ√’ °√–∑√«ß «— ≤π∏√√¡ °√–∑√«ß»÷ °…“∏‘ °“√ °√¡ª√–™“ — ¡æ— π∏å ∫√‘ …— ∑ ‡Õ‡™’ ¬ ‡∑‡≈«‘ ™—Ë π ·Õπ¥å ¡’ ‡¥’ ¬ ®”°— ¥ ·≈–∫√‘ …— ∑ ‡«‘ √å §æÕ¬∑å ‡ÕÁ π‡µÕ√å ‡∑π‡¡π∑å ®”°— ¥ (¡À“™π) ®— ¥ß“π√≥√ß§å „Àâ ªï Úıı ‡ªì πªï ¿“…“‰∑¬ ‡©≈‘ ¡æ√–‡°’ ¬√µ‘ æ√–∫“∑ ¡‡¥Á ®æ√–‡®â “Õ¬Ÿà À— « ‡π◊Ë Õß„π‚Õ°“ ¡À“¡ß§≈‡©≈‘ ¡æ√–™π¡æ√√…“ ¯ æ√√…“ ı ∏— 𫓧¡ Úıı ‚¥¬¡’ °‘ ®°√√¡√à «¡°— πµ≈Õ¥ªï §≥–°√√¡°“√Õ”π«¬°“√®— ¥ß“π ªï ¿“…“‰∑¬œ À«— ß«à “‚§√ß°“√π’È ®–™à «¬ª≈ÿ °°√–· „Àâ §π‰∑¬À— π¡“æŸ ¥·≈–„™â ¿“…“‰∑¬Õ¬à “ß∂Ÿ °µâ Õß Õ’ °∑—È ß‡ªì π°“√‡º¬·æ√à º≈ß“π¥â “π¿“…“‰∑¬¢Õß√“™∫— ≥±‘ µ¬ ∂“π Ÿà ª√–™“™π ·≈–‡æ‘Ë ¡ª√– ‘ ∑∏‘ ¿“æ °“√„Àâ ∫√‘ °“√∑“ß«‘ ™“°“√¢Õß√“™∫— ≥±‘ µ¬ ∂“π Ÿà ª√–™“™π„Àâ °«â “ߢ«“ß·≈–∑—Ë «∂÷ ߬‘Ë ß¢÷È π