动态激磁功放大电流真峰值检测与自动调节电路

Detection and Automatic Adjustment Circuit of Current True Peak Value of the Dynamic Excitation Power Amplifier

介绍了一个采用全硬件方式设计的模块化电路,用以对动态激磁功率放大器末级输出电流的真峰值进行实时检测和自动跟踪调节。模块由峰值采样同步触发、真峰值采样保持和比较控制输出三部分电路构成。经试验验证,该电路实现了实时检测激磁功放末级输出的动态电流真峰值,并可对电流的过、欠流状态自动调节。该模块电路既可以应用在动态激磁功率放大器电路中,同时也可以应用在其他周期信号的真峰值检测电路中,为系统的正常工作提供了安全保障。

A modular circuit design is introduced, which wholly uses hardware approach for the real-time detec tion and automatic adjustment to the current peak value on the final stage of the dynamic excitation power am plifier. This module consists of three part of sampling and holding the true current peak, synchronous trigger to the current peak value sampling and the comparison and control output. The experiment shows that the circuit realizes the real-time detection of the dynamic current peak value outputed by the final stage of excitation pow er amplifier, and automatically adjusts current in both over-current and under-current state. This modular cir cuit can be applied to the dynamic excitation power amplifier circuit and the other peak value detection systems of periodic signals, which provides security for the normal operation of the system.