ENERGY HARVESTING SYSTEM USING VARIABLE ADJUSTMENT OF CAPACITOR TO PREVENT SATURATION OF MAGNETIC FLUX DENSITY OF CORE AND OPERATION METHOD THEREOF

• Main Authors: CHO, YONG SUN, PARK, DONG IN, PARK, SONG PUM
• Format: Patent
• Language: English; Korean
• Published: 10.08.2021
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSFORMERS

According to one embodiment of the present invention, an energy harvesting system includes: a secondary circuit generating a second voltage in accordance with an induced electromotive force by a primary circuit delivering a first voltage including an alternating current (AC) component of a predetermined size; a core magnetically associated with the primary and secondary circuits in accordance with a predetermined turns ratio; a capacitor variable-adjustment circuit having one end connected with one end of the secondary circuit, and delivering a first output voltage associated with a second voltage through the other end; a plurality of diode circuits connected with the other end of the capacitor variable-adjustment circuit and the other end of the secondary circuit; and a controller measuring a second output voltage delivered from the plurality of diode circuits, and controlling capacitance for the capacitor variable-adjustment circuit based on the measured second output voltage. Therefore, the present invention is capable of inducing an improvement in energy efficiency. 본 일 실시 예에 따른 에너지 하베스팅 시스템은, 미리 정해진 크기의 교류(AC) 성분을 포함하는 제1 전압을 전달하는 제 1차 회로에 의한 유도기전력에 따른 제2 전압이 생성되는 제2 차 회로; 미리 정해진 권선비(turns ratio)에 따라 제1 차 회로 및 상기 제2 차 회로와 자기적으로(magnetically) 연관되는 코어; 일단은 제2차 회로의 일단과 연결되고, 제2 전압과 연관된 제1 출력전압을 타단을 통해 전달하는 커패시터 가변조정회로; 커패시터 가변조정회로의 타단 및 제2 차 회로의 타단과 연결되는 복수의 다이오드 회로; 및 복수의 다이오드 회로로부터 전달되는 제2 출력전압을 측정하고, 측정된 제2 출력전압을 기반으로 커패시터 가변조정회로를 위한 정전용량(capacitance)를 조절하는 제어 장치를 포함한다.