首页>
外国专利>
Circuit and method for frequency synthesis for signal detection in automatic voltage regulation for synchronous generators
Circuit and method for frequency synthesis for signal detection in automatic voltage regulation for synchronous generators
展开▼
机译:同步发电机自动调压中用于信号检测的频率合成电路和方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
Automatic voltage regulation is shown involving full wave rectifying a power signal and generating a reference corresponding to an operating voltage level, line sampling the power signal and comparing it to the reference to generate a line sync signal synchronized to the power signal. Producing 90° out of phase signals synchronized to the line sync signal with a PLL locked onto the line sync signal that outputs a phase error signal. Generating a quadrature signal from the phase signals. Sampling the peaks of the rectified power signal using the quadrature signal to produce a control signal. Subtracting the error signal and damping signal from the reference to produce a duty cycle modulation signal. The duty cycle modulation signal controls a duty cycle of a field voltage control signal that oscillates at a predetermined frequency. The field voltage control signal is low-pass filtered to produce the damping signal. The control signal is utilized to detect a short circuit condition and engage a circuit protection device. The reference voltage may also be obtained from another generator so that the output voltage is controlled to operate in sync with the other generator.
展开▼