Electronic control for switching variable speed/variable voltage electric generator

摘要

An adjustable speed propulsion engine for a boat also drives an electric generator which supplies electric power to an electric load circuit on the boat. A solid state electronic control circuit senses when generator voltage departs from a voltage "window" or range defined by preselected low and high voltages (as a result of a departure in engine speed from a cruise speed range to some lower or high speed) and operates a contactor to disconnect the generator from the load circuit to prevent low or high voltage damage to electrical equipment on board. The electronic control circuit operates the contactor to reconnect the generator to the load circuit only when generator voltage rises to a preselected initial turn-on voltage which is above the preselected low voltage but below the normal rated voltage of the generator. The electronic control circuit includes time delay means to prevent a transient low voltage condition ("flicker") from causing disconnection of the generator from the load circuit.