A Numerical Simulation Method for Temperature Characteristics of Loudspeaker Voice Coil and Magnetic Circuit
A technology of numerical simulation and temperature characteristics, applied in the field of loudspeakers, which can solve the problems of long development cycle and high cost
Active Publication Date: 2015-09-02
嘉善恩益迪电声技术服务有限公司 +1
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Problems solved by technology
[0004] The main problems to be solved by the present invention are: (1) the problem of high cost caused by relying on special hardware equipment to estimate the temperature by applying special excitation signals in the previous prediction method; The problem of long development cycle caused by the hardware simulation method of the excitation signal in the future; (3) instead of the traditional prediction method that can only predict the temperature of the magnetic circuit and the voice coil, the new numerical simulation method can predict the temperature of the voice coil and the magnetic coil. The temperature distribution of parts other than the road, and can simulate the distribution of heat flow, so as to understand the heat transfer process
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[0050] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0051] The present invention takes an axisymmetric circular car speaker as an example, and the analysis is not limited to the circular speaker or the car speaker. The temperature characteristics are analyzed by numerical simulation method. Such as figure 1 Shown, the steps of the present invention are as follows:
[0052] Step 1: Simplify the geometric model. figure 2 It is an axisymmetric circular loudspeaker. Simplify the speaker model and add an air model to the simplified model to correctly simulate the effects of air on heat conduction, convection, and radiation.
[0053] image 3 yes figure 2 The simplified geometric model diagram, because it is axisymmetric, only needs to build half of the model. In the figure, 1 is the dust cap, 2 is the voice coil skeleton, 3 is the centering piece, 4 is the air, 5 is the frame, 6 is the magnetic front...
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The invention provides a temperature characteristic value simulation method for the speech coil and magnetic circuit of a loudspeaker. The method comprises the following steps: firstly, establishing a plane geometric model including a speech coil, a magnetic circuit, and air in the magnetic circuit; defining unit types and material attributes; secondly, relating defined unit types and material attributes to faces representing different structures; thirdly, performing grid division to obtain a finite element model; fourthly, applying heat generation rate loading and heat convection boundary conditions, and meanwhile, arranging a radiation environment on the surface of the speech coil and the surface of the magnetic circuit near to the speech coil; and lastly, performing a steady-state analysis to obtain a temperature value, a heat flow density vector, and the like for any point in the speech coil and magnetic circuit of the loudspeaker.
Description
Technical field [0001] The invention is a speaker field, involving the numerical simulation method of the temperature distribution characteristics and thermal distribution characteristics caused by the thermal effects of the speaker sound and the magnetic circuit during the working process.This method can be used to simulate the distribution of the sound coil and magnetic circuit of the speaker in actual work, and then simulate the temperature at any time based on the temperature value of the temperature values based on steady -state analysis.This simulation method can be used to provide a reference for the thermal effect analysis of the speaker, the test of the theory of heat transfer, the influence of the rated power of the calibration, and the influence of the study of nonlinear distortion with the influence of temperature changes. Background technique [0002] Excessive temperature of the speaker not only affects the quality of the sound by affecting the linear and non -linea...
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IPC IPC(8): G06F17/50
Inventor 温周斌滕越陆晓徐楚林李宏斌许丽媛
Owner 嘉善恩益迪电声技术服务有限公司