基于PWM控制音响电源的仿真研究

针对目前大多数大功率音响电源是笨重的线性电源的情况，研究了一种高效简便的复合式全桥开关电源。复合式稳压电源是由PWM控制全桥开关电源和线性稳压器构成，它同时拥有线性电源和开关电源两者的优点，不仅电源输出功率大，效率较高，而且稳压性能好，输出的纹波噪声很小。为验证其可行性与有效性，对Matlab/Simulink 建立音响电源仿真模型的输出电压电流波形进行分析，仿真结果表明，采用改进后的复合式音响电源，能有效降低输出纹波，提高电源效率及其稳定性。

Simulation Research on Acoustic Power Supply Based on PWM

In view of the fact that most of the high-power audio power supplies are heavy linear power supplies,an efficient and simple hybrid audio power supply is studied.It is composed of a PWM-controlled full-bridge switching power supply and a linear regulator,also has the advantages of both,that is high power output,high efficiency,and good voltage regulation performance,small output ripple and noise.In order to verify its feasibility and validity,the output waveforms of acoustic power simulation model established by Matlab/Simulink were analyzed.The results show that the improved composite sound power,can effectively reduce the output ripple and improve the power efficiency and stability.