Bài giảng Electrical and electronic principles: Chương 5 - ThS. Ngô Quốc Cường

TRƯỜNG ĐẠI HỌC SƯ PHẠM KỸ THUẬT<br /> <br /> TP. HỒ CHÍ MINH<br /> <br /> ELECTRICAL AND ELECTRONIC<br /> PRINCIPLES<br /> WEEK 5<br /> <br /> Cuong Q. Ngo<br /> <br /> Last classes<br /> • Maximum power transfer<br /> <br /> • MATLAB fundamentals<br /> • Single frequency AC analysis (MultiSim)<br /> <br /> 2<br /> <br /> CONTENTS (Today)<br /> • Magnetically coupled circuits<br /> • Transformer<br /> • Resonance<br /> <br /> 3<br /> <br /> 1.Magnetically coupled circuits<br /> • Mutual inductance<br /> – Mutual inductance is the ability of one inductor to induce a<br /> voltage across a neighboring inductor, measured in henrys<br /> (H).<br /> – If a current enters the dotted terminal of one coil, the<br /> reference polarity of the mutual voltage in the second coil<br /> is positive at the dotted terminal of the second coil<br /> <br /> 4<br /> <br /> 1.Magnetically coupled circuits<br /> • If a current leaves the dotted terminal of one coil, the<br /> reference polarity of the mutual voltage in the second coil is<br /> negative at the dotted terminal of the second coil<br /> •<br /> <br /> 5<br /> <br />