多态的大功率可控硅开关功率放大器的仿真

Simulation and research of high-power silicon controlled rectifier switching power amplifier based on various working state

为了满足远距离海底探测对发射信号大功率的需求,选用了一种大功率可控硅开关功率放大器。在临界换流、自然换流和强迫换流3种工作状态下,分析了该功率放大器的工作原理,并建立了等效电路模型。运用Or CAD仿真了临界换流状态时的等效电路模型;在自然换流状态和强迫换流状态下,为获得功放电流值和负载电流值,对其等效电路模型分别建立了非线性数学模型,并通过Matlab和VC++采用四阶Runge-Kutta法对非线性数学模型进行求解。以上方法能够求得该功率放大器电路在任意时刻、任意点处的电流电压值,能较客观、真实地反映电路的工作状况,对工程应用具有一定的参考价值。

For the requirement of high-power transmit signals in long-distance submarine detection,a high-power siticon controlled rectifier switching power amplifier （SPA）was used.The operating principle of this SPA was analyzed and the equivalent circuit models were established under different working states including critical commutating state,natural commutating state and compulsive commutating state.The equivalent circuit models were emulated in OrCAD when the SPA worked in critical commutating state.For the acquisition of power amplifier and load current value about SPA in natural and compulsive commutating state,the nonlinear mathematical models were established in the base of equivalent circuit models,then they were solved by fourth-order Runge -Kutta method under the platform of Matlab and VC ＋＋.The methods mentioned can calculate the voltage and current at any time any point of the SPA;it can reflect the working state of circuit objectively and factually;the research may be of certain reference for engineering application.