Alternator voltage regulator with revolution fixed plate and system for charging a battery by means of this alternating current generator

摘要

A phase winding detector (50) is preferably used to detect alternator (11) rotation in an alternator charging system (10). The detector (50) receives a single winding phase output signal (at 39) and utilizes sampling apparatus (71, 74, 76) to provide a sampled phase output signal (at 75). Comparison means (70) provides an output by comparing the phase output signal with the sampled phase output signal, whereby a detection of variation in the phase output signal is provided (at terminals 85, 87 and 51). After initial detection of variation of the phase winding output signal, preferably additional circuitry (77, 79, 83) results in comparing the phase winding signal with a fixed reference threshold (Vref). Detection of a phase winding output signal is implemented without use of a substantial DC blocking capacitor and is implemented by monitoring only one input signal terminal.