主题：扬声器等效电路分析

此主题相关图片如下：

再看看复杂点的等效电路图!

任一节点处，流入的和流出的电流代数和为零，即流入的等于流出的；任一闭合回路中，电压升之和等于电压降之和，即电压的代数和为零。

这两个定律可以用于复杂电路的计算－－即不能用简单的串、并联方法来求解的电路。也称克希荷夫定律、基洛夫定律。

用spice模擬時.這些電阻電容電感值是如何套出數據來的

(都有公式计算的,有些材料数据需要测试).

邮件发给版主水仙吧:

adrian_chi@163.com

这里的一些数据有误.

给一个微型扬声器的简化模型(都是声学元件,如声压,声阻,声容,声质量)

上图数据按以下机电参数计算:

0.1m 0.1W 8ohm

Re: 7.21ohm

Sd: 0.0001158 m^2

BL: 0.45Tm

Eg: 0.89V

Rms: 0.023Kg/s

Cms: 0.00206m/N

Mms: 0.0000216Kg

            http://users.ece.gatech.edu/~mleach/papers/vcinduc.pdf
            Loudspeaker Voice-Coil Inductance Losses: Circuit Models, Parameter Estimation, and Effect on Frequency Response

by W. Marshall Leach, Jr., Professor
Georgia Institute of Technology
School of Electrical and Computer Engineering
Atlanta, Georgia 30332-0250 USA

Download Evaluation Version of AIM-Spice

Click here to download Version 5.0 for Windows Vista/XP/2003 Server/2000/NT.

另一个仿真软件.

SwitcherCAD^TM 是一款高性能 Spice III 仿真器、电路图捕获和波形观测器，并为简化开关稳压器的仿真提供了改进和模型。

http://ltspice.linear.com/software/swcadiii.exe

SPICE is the most commonly used analog circuit simulator today and is enormously important for the electronics industry. SPICE is a general purpose analog simulator which contains models for most circuit elements and can handle complex nonlinear circuits. The simulator can calculate dc operating points, perform transient analyses, locate poles and zeros for different kinds of transfer functions, find the small signal frequency response, small signal transfer functions, small signal sensitivities, and perform Fourier, noise, and distortion analyses.

The simulator was developed at the University of California, Berkeley, and was first released in 1972. Many scientists at Berkeley and other institutions contributed to the development and improvement in subsequent versions of SPICE. In 1975, Nagel described the next major release of SPICE, called SPICE2. The core of the program still remained intact, even after many improvements and additions. These included improved device models, numerical techniques, and user interfaces. The last major release, SPICE3, came in 1985 with a conversion of the source code from FORTRAN to the C programming language. The Berkeley version of SPICE is a public domain program, but since the late 1970s a number of companies have released commercial versions of SPICE, providing further improvements in user support, in user interfaces, and, in certain cases, also in models and in simulation convergence.

AIM-Spice is a new version of SPICE running under the Microsoft Windows and Linux operating systems. AIM-Spice for Windows is capable of displaying graphically the results of a simulation in progress, a feature that allows the operator to terminate a run based on an instant information on intermediate simulation results. The development of AIM-Spice was motivated by the need of a more user friendly interface, and as a vehicle for the new set of advanced device models for circuit simulation developed by our group.

the source code from FORTRAN to the C programming language

原来SPICE的源代码是从FORTRAN语言改成C语言

adrian_chi@163.com

电力声类比,南大声学专业肯定讲得更透.

主要问题是不可能人人读南大.