Fast peak detector for variable frequency three-phase sinusoidal signals

A fast peak detector for three-phase variable frequency sinusoidal signals is proposed. This novel detector fully uses the three-phase characteristic to achieve instantaneous response and frequency independence characteristics. Moreover, the proposed detector possesses excellent linearity and low sensitivity to small voltage unbalance and harmonic distortion. Because of its promising accuracy and transient response, it can be used to improve the transient response performance of the conventional sinusoidal peak detectors. Theoretical analysis and some experimental results are also detailed in this context