RLC电路频率特性的实验研究精要.doc

学号20100601050105 密级 兰州城市学院本科毕业论文 RLC电路频率特性的实验研究 学 院 名 称：培黎工程技术学院 专 业 名 称：物理学 学 生 姓 名：关进京 指 导 教 师：赵 磊 讲师 二○一四年五月 BACHELORS DEGREE THESIS OF LANZHOU CITY UNIVERSITY Experimental study of the frequency characteristics of the RLC circuit College ： Bailie Engineering Technology Subject ：physics Name：Directed by ：lecture May 2014 郑 重 声 明 本人呈交的学位论文，是在导师的指导下，独立进行研究工作所取得的成果，所有数据、图片资料真实可靠。尽我所知，除文中已经注明引用的内容外，本学位论文的研究成果不包含他人享有著作权的内容。对本论文所涉及的研究工作做出贡献的其他个人和集体，均已在文中以明确的方式标明。本学位论文的知识产权归属于培养单位。 本人签名： 日期： 摘 要 RLC电路是一种由电阻(R、电感L)、电容(C组成的电路结构R、L、CRLC电路的基本规律做了归纳和推导，重点对RLC中谐振特性做出了说明，使初学者对其规律有全面认识；接着用实验的方法，探究了RLC谐振电路的特性，重点对于谐振中的品质因数(Q)值进行了细致研究，电路品质因数Q 值的物理意义在于揭示了电路谐振程度的强弱，体现电路对信号源频率的选择性以及电路中无功功率对有功功率的比例。充分理解谐振和品质因数的物理含义对掌握和应用其原理起到事半功倍的效果，为初学者和《RLC电路；谐振；品质因数Q ABSTRACT RLC circuit is composed of resistance (R), inductor (L) and capacitance (C). Because of R, L, C’s different responses to excitation, it becomes hard for beginners to grasp the basic law. This paper started from the conclusion and derivation of the basic law of RLC circuit theoretically, and focused on the description of the RLC resonant characteristics, to make beginners have a comprehensive understanding. With experimental methods, this paper explored the characteristics of the RLC resonant circuit, especially studied the quality factor (Q) value in resonance carefully. The physical significance of the Q value is it reveals the strength of the degree of resonant circuit and shows the selectivity of the circuit to signal source frequency, also the active power to the reactive power ratio. To grasp and apply the principles of the quality factor of resonance, it will get twice the result with half the effort through fully understand the physical meaning of that. This paper provided st